802934 Commits

Author SHA1 Message Date
Stephen Brennan
b8a9a6df60 mm, vmstat: drop zone->lock in /proc/pagetypeinfo
Commit 93b3a674485f6a4b8ffff85d1682d5e8b7c51560 upstream

Commit 93b3a674485f ("mm,vmstat: reduce zone->lock holding time by
/proc/pagetypeinfo") upstream caps the number of iterations over each
free_list at 100,000, and also drops the zone->lock in between each
migrate type. Capping the iteration count alters the file contents in
some cases, which means this approach may not be suitable for stable
backports.

However, dropping zone->lock in between migrate types (and, as a result,
page orders) will not change the /proc/pagetypeinfo file contents. It
can significantly reduce the length of time spent with IRQs disabled,
which can prevent missed interrupts or soft lockups which we have
observed on systems with particularly large memory.

Thus, this commit is a modified version of the upstream one which only
drops the lock in between migrate types.

Fixes: 467c996c1e19 ("Print out statistics in relation to fragmentation avoidance to /proc/pagetypeinfo")
Signed-off-by: Stephen Brennan <stephen.s.brennan@oracle.com>
Reviewed-by: Aruna Ramakrishna <aruna.ramakrishna@oracle.com>
Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-03 08:38:02 +02:00
Greg Kroah-Hartman
6b7b0056de Linux 4.19.192
Link: https://lore.kernel.org/r/20210524152324.382084875@linuxfoundation.org
Tested-by: Shuah Khan <skhan@linuxfoundation.org>
Tested-by: Jason Self <jason@bluehome.net>
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Tested-by: Pavel Machek (CIP) <pavel@denx.de>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Hulk Robot <hulkrobot@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
v4.19.192
2021-05-26 11:48:36 +02:00
Luiz Augusto von Dentz
30126d4ba7 Bluetooth: SMP: Fail if remote and local public keys are identical
commit 6d19628f539fccf899298ff02ee4c73e4bf6df3f upstream.

This fails the pairing procedure when both remote and local non-debug
public keys are identical.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:36 +02:00
Anirudh Rayabharam
1dfd47b684 video: hgafb: correctly handle card detect failure during probe
commit 02625c965239b71869326dd0461615f27307ecb3 upstream.

The return value of hga_card_detect() is not properly handled causing
the probe to succeed even though hga_card_detect() failed. Since probe
succeeds, hgafb_open() can be called which will end up operating on an
unmapped hga_vram. This results in an out-of-bounds access as reported
by kernel test robot [1].

To fix this, correctly detect failure of hga_card_detect() by checking
for a non-zero error code.

[1]: https://lore.kernel.org/lkml/20210516150019.GB25903@xsang-OptiPlex-9020/

Fixes: dc13cac4862c ("video: hgafb: fix potential NULL pointer dereference")
Cc: stable <stable@vger.kernel.org>
Reported-by: kernel test robot <oliver.sang@intel.com>
Reviewed-by: Igor Matheus Andrade Torrente <igormtorrente@gmail.com>
Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20210516192714.25823-1-mail@anirudhrb.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Tetsuo Handa
17d6c58c5f tty: vt: always invoke vc->vc_sw->con_resize callback
commit ffb324e6f874121f7dce5bdae5e05d02baae7269 upstream.

syzbot is reporting OOB write at vga16fb_imageblit() [1], for
resize_screen() from ioctl(VT_RESIZE) returns 0 without checking whether
requested rows/columns fit the amount of memory reserved for the graphical
screen if current mode is KD_GRAPHICS.

----------
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <fcntl.h>
  #include <sys/ioctl.h>
  #include <linux/kd.h>
  #include <linux/vt.h>

  int main(int argc, char *argv[])
  {
        const int fd = open("/dev/char/4:1", O_RDWR);
        struct vt_sizes vt = { 0x4100, 2 };

        ioctl(fd, KDSETMODE, KD_GRAPHICS);
        ioctl(fd, VT_RESIZE, &vt);
        ioctl(fd, KDSETMODE, KD_TEXT);
        return 0;
  }
----------

Allow framebuffer drivers to return -EINVAL, by moving vc->vc_mode !=
KD_GRAPHICS check from resize_screen() to fbcon_resize().

Link: https://syzkaller.appspot.com/bug?extid=1f29e126cf461c4de3b3 [1]
Reported-by: syzbot <syzbot+1f29e126cf461c4de3b3@syzkaller.appspotmail.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Tested-by: syzbot <syzbot+1f29e126cf461c4de3b3@syzkaller.appspotmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Maciej W. Rozycki
8c5ec4a731 vt: Fix character height handling with VT_RESIZEX
commit 860dafa902595fb5f1d23bbcce1215188c3341e6 upstream.

Restore the original intent of the VT_RESIZEX ioctl's `v_clin' parameter
which is the number of pixel rows per character (cell) rather than the
height of the font used.

For framebuffer devices the two values are always the same, because the
former is inferred from the latter one.  For VGA used as a true text
mode device these two parameters are independent from each other: the
number of pixel rows per character is set in the CRT controller, while
font height is in fact hardwired to 32 pixel rows and fonts of heights
below that value are handled by padding their data with blanks when
loaded to hardware for use by the character generator.  One can change
the setting in the CRT controller and it will update the screen contents
accordingly regardless of the font loaded.

The `v_clin' parameter is used by the `vgacon' driver to set the height
of the character cell and then the cursor position within.  Make the
parameter explicit then, by defining a new `vc_cell_height' struct
member of `vc_data', set it instead of `vc_font.height' from `v_clin' in
the VT_RESIZEX ioctl, and then use it throughout the `vgacon' driver
except where actual font data is accessed which as noted above is
independent from the CRTC setting.

This way the framebuffer console driver is free to ignore the `v_clin'
parameter as irrelevant, as it always should have, avoiding any issues
attempts to give the parameter a meaning there could have caused, such
as one that has led to commit 988d0763361b ("vt_ioctl: make VT_RESIZEX
behave like VT_RESIZE"):

 "syzbot is reporting UAF/OOB read at bit_putcs()/soft_cursor() [1][2],
  for vt_resizex() from ioctl(VT_RESIZEX) allows setting font height
  larger than actual font height calculated by con_font_set() from
  ioctl(PIO_FONT). Since fbcon_set_font() from con_font_set() allocates
  minimal amount of memory based on actual font height calculated by
  con_font_set(), use of vt_resizex() can cause UAF/OOB read for font
  data."

The problem first appeared around Linux 2.5.66 which predates our repo
history, but the origin could be identified with the old MIPS/Linux repo
also at: <git://git.kernel.org/pub/scm/linux/kernel/git/ralf/linux.git>
as commit 9736a3546de7 ("Merge with Linux 2.5.66."), where VT_RESIZEX
code in `vt_ioctl' was updated as follows:

 		if (clin)
-			video_font_height = clin;
+			vc->vc_font.height = clin;

making the parameter apply to framebuffer devices as well, perhaps due
to the use of "font" in the name of the original `video_font_height'
variable.  Use "cell" in the new struct member then to avoid ambiguity.

References:

[1] https://syzkaller.appspot.com/bug?id=32577e96d88447ded2d3b76d71254fb855245837
[2] https://syzkaller.appspot.com/bug?id=6b8355d27b2b94fb5cedf4655e3a59162d9e48e3

Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org # v2.6.12+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Maciej W. Rozycki
9a71ed8da9 vgacon: Record video mode changes with VT_RESIZEX
commit d4d0ad57b3865795c4cde2fb5094c594c2e8f469 upstream.

Fix an issue with VGA console font size changes made after the initial
video text mode has been changed with a user tool like `svgatextmode'
calling the VT_RESIZEX ioctl.  As it stands in that case the original
screen geometry continues being used to validate further VT resizing.

Consequently when the video adapter is firstly reprogrammed from the
original say 80x25 text mode using a 9x16 character cell (720x400 pixel
resolution) to say 80x37 text mode and the same character cell (720x592
pixel resolution), and secondly the CRTC character cell updated to 9x8
(by loading a suitable font with the KD_FONT_OP_SET request of the
KDFONTOP ioctl), the VT geometry does not get further updated from 80x37
and only upper half of the screen is used for the VT, with the lower
half showing rubbish corresponding to whatever happens to be there in
the video memory that maps to that part of the screen.  Of course the
proportions change according to text mode geometries and font sizes
chosen.

Address the problem then, by updating the text mode geometry defaults
rather than checking against them whenever the VT is resized via a user
ioctl.

Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Fixes: e400b6ec4ede ("vt/vgacon: Check if screen resize request comes from userspace")
Cc: stable@vger.kernel.org # v2.6.24+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Igor Matheus Andrade Torrente
fd8f21c9d2 video: hgafb: fix potential NULL pointer dereference
commit dc13cac4862cc68ec74348a80b6942532b7735fa upstream.

The return of ioremap if not checked, and can lead to a NULL to be
assigned to hga_vram. Potentially leading to a NULL pointer
dereference.

The fix adds code to deal with this case in the error label and
changes how the hgafb_probe handles the return of hga_card_detect.

Cc: Ferenc Bakonyi <fero@drama.obuda.kando.hu>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Igor Matheus Andrade Torrente <igormtorrente@gmail.com>
Link: https://lore.kernel.org/r/20210503115736.2104747-40-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Tom Seewald
2ca93aca35 qlcnic: Add null check after calling netdev_alloc_skb
commit 84460f01cba382553199bc1361f69a872d5abed4 upstream.

The function qlcnic_dl_lb_test() currently calls netdev_alloc_skb()
without checking afterwards that the allocation succeeded. Fix this by
checking if the skb is NULL and returning an error in such a case.
Breaking out of the loop if the skb is NULL is not correct as no error
would be reported to the caller and no message would be printed for the
user.

Cc: David S. Miller <davem@davemloft.net>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Tom Seewald <tseewald@gmail.com>
Link: https://lore.kernel.org/r/20210503115736.2104747-26-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Phillip Potter
8c5548e36f leds: lp5523: check return value of lp5xx_read and jump to cleanup code
commit 6647f7a06eb030a2384ec71f0bb2e78854afabfe upstream.

Check return value of lp5xx_read and if non-zero, jump to code at end of
the function, causing lp5523_stop_all_engines to be executed before
returning the error value up the call chain. This fixes the original
commit (248b57015f35) which was reverted due to the University of Minnesota
problems.

Cc: stable <stable@vger.kernel.org>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210503115736.2104747-10-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Greg Kroah-Hartman
3ac4e35dbc net: rtlwifi: properly check for alloc_workqueue() failure
commit 30b0e0ee9d02b97b68705c46b41444786effc40c upstream.

If alloc_workqueue() fails, properly catch this and propagate the error
to the calling functions, so that the devuce initialization will
properly error out.

Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: Bryan Brattlof <hello@bryanbrattlof.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-14-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Phillip Potter
11ffb2d603 scsi: ufs: handle cleanup correctly on devm_reset_control_get error
commit 2f4a784f40f8d337d6590e2e93f46429052e15ac upstream.

Move ufshcd_set_variant call in ufs_hisi_init_common to common error
section at end of the function, and then jump to this from the error
checking statements for both devm_reset_control_get and
ufs_hisi_get_resource. This fixes the original commit (63a06181d7ce)
which was reverted due to the University of Minnesota problems.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210503115736.2104747-32-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Anirudh Rayabharam
6db3667f75 net: stmicro: handle clk_prepare() failure during init
commit 0c32a96d000f260b5ebfabb4145a86ae1cd71847 upstream.

In case clk_prepare() fails, capture and propagate the error code up the
stack. If regulator_enable() was called earlier, properly unwind it by
calling regulator_disable().

Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-22-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Du Cheng
9b4a9f267a ethernet: sun: niu: fix missing checks of niu_pci_eeprom_read()
commit e6e337708c22f80824b82d4af645f20715730ad0 upstream.

niu_pci_eeprom_read() may fail, so add checks to its return value and
propagate the error up the callstack.

An examination of the callstack up to niu_pci_eeprom_read shows that:

niu_pci_eeprom_read() // returns int
    niu_pci_vpd_scan_props() // returns int
        niu_pci_vpd_fetch() // returns *void*
            niu_get_invariants() // returns int

since niu_pci_vpd_fetch() returns void which breaks the bubbling up,
change its return type to int so that error is propagated upwards.

Signed-off-by: Du Cheng <ducheng2@gmail.com>
Cc: Shannon Nelson <shannon.lee.nelson@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-24-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:35 +02:00
Greg Kroah-Hartman
8432db9d8a Revert "niu: fix missing checks of niu_pci_eeprom_read"
commit 7930742d6a0ff091c85b92ef4e076432d8d8cb79 upstream.

This reverts commit 26fd962bde0b15e54234fe762d86bc0349df1de4.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

The change here was incorrect.  While it is nice to check if
niu_pci_eeprom_read() succeeded or not when using the data, any error
that might have happened was not propagated upwards properly, causing
the kernel to assume that these reads were successful, which results in
invalid data in the buffer that was to contain the successfully read
data.

Cc: Kangjie Lu <kjlu@umn.edu>
Cc: Shannon Nelson <shannon.lee.nelson@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Fixes: 26fd962bde0b ("niu: fix missing checks of niu_pci_eeprom_read")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-23-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
4190fc7c26 Revert "qlcnic: Avoid potential NULL pointer dereference"
commit b95b57dfe7a142bf2446548eb7f49340fd73e78b upstream.

This reverts commit 5bf7295fe34a5251b1d241b9736af4697b590670.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

This commit does not properly detect if an error happens because the
logic after this loop will not detect that there was a failed
allocation.

Cc: Aditya Pakki <pakki001@umn.edu>
Cc: David S. Miller <davem@davemloft.net>
Fixes: 5bf7295fe34a ("qlcnic: Avoid potential NULL pointer dereference")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-25-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
ff867789b5 Revert "rtlwifi: fix a potential NULL pointer dereference"
commit 68c5634c4a7278672a3bed00eb5646884257c413 upstream.

This reverts commit 765976285a8c8db3f0eb7f033829a899d0c2786e.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

This commit is not correct, it should not have used unlikely() and is
not propagating the error properly to the calling function, so it should
be reverted at this point in time.  Also, if the check failed, the
work queue was still assumed to be allocated, so further accesses would
have continued to fail, meaning this patch does nothing to solve the
root issues at all.

Cc: Kangjie Lu <kjlu@umn.edu>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: Bryan Brattlof <hello@bryanbrattlof.com>
Fixes: 765976285a8c ("rtlwifi: fix a potential NULL pointer dereference")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-13-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
4d08695b76 Revert "media: rcar_drif: fix a memory disclosure"
commit 3e465fc3846734e9489273d889f19cc17b4cf4bd upstream.

This reverts commit d39083234c60519724c6ed59509a2129fd2aed41.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, it was determined that this commit is not needed at all as
the media core already prevents memory disclosure on this codepath, so
just drop the extra memset happening here.

Cc: Kangjie Lu <kjlu@umn.edu>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Fixes: d39083234c60 ("media: rcar_drif: fix a memory disclosure")
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Link: https://lore.kernel.org/r/20210503115736.2104747-4-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
b85a5f191e cdrom: gdrom: initialize global variable at init time
commit 9183f01b5e6e32eb3f17b5f3f8d5ad5ac9786c49 upstream.

As Peter points out, if we were to disconnect and then reconnect this
driver from a device, the "global" state of the device would contain odd
values and could cause problems.  Fix this up by just initializing the
whole thing to 0 at probe() time.

Ideally this would be a per-device variable, but given the age and the
total lack of users of it, that would require a lot of s/./->/g changes
for really no good reason.

Reported-by: Peter Rosin <peda@axentia.se>
Cc: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Peter Rosin <peda@axentia.se>
Link: https://lore.kernel.org/r/YJP2j6AU82MqEY2M@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Atul Gopinathan
0a1a603398 cdrom: gdrom: deallocate struct gdrom_unit fields in remove_gdrom
commit d03d1021da6fe7f46efe9f2a7335564e7c9db5ab upstream.

The fields, "toc" and "cd_info", of "struct gdrom_unit gd" are allocated
in "probe_gdrom()". Prevent a memory leak by making sure "gd.cd_info" is
deallocated in the "remove_gdrom()" function.

Also prevent double free of the field "gd.toc" by moving it from the
module's exit function to "remove_gdrom()". This is because, in
"probe_gdrom()", the function makes sure to deallocate "gd.toc" in case
of any errors, so the exit function invoked later would again free
"gd.toc".

The patch also maintains consistency by deallocating the above mentioned
fields in "remove_gdrom()" along with another memory allocated field
"gd.disk".

Suggested-by: Jens Axboe <axboe@kernel.dk>
Cc: Peter Rosin <peda@axentia.se>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Atul Gopinathan <atulgopinathan@gmail.com>
Link: https://lore.kernel.org/r/20210503115736.2104747-28-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
69d1723034 Revert "gdrom: fix a memory leak bug"
commit 257343d3ed557f11d580d0b7c515dc154f64a42b upstream.

This reverts commit 093c48213ee37c3c3ff1cf5ac1aa2a9d8bc66017.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

Because of this, all submissions from this group must be reverted from
the kernel tree and will need to be re-reviewed again to determine if
they actually are a valid fix.  Until that work is complete, remove this
change to ensure that no problems are being introduced into the
codebase.

Cc: Wenwen Wang <wang6495@umn.edu>
Cc: Peter Rosin <peda@axentia.se>
Cc: Jens Axboe <axboe@kernel.dk>
Fixes: 093c48213ee3 ("gdrom: fix a memory leak bug")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-27-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
12b6934b22 Revert "scsi: ufs: fix a missing check of devm_reset_control_get"
commit 4d427b408c4c2ff1676966c72119a3a559f8e39b upstream.

This reverts commit 63a06181d7ce169d09843645c50fea1901bc9f0a.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

The original commit is incorrect, it does not properly clean up on the
error path, so I'll keep the revert and fix it up properly with a
follow-on patch.

Cc: Kangjie Lu <kjlu@umn.edu>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Fixes: 63a06181d7ce ("scsi: ufs: fix a missing check of devm_reset_control_get")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-31-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
b3af225795 Revert "ecryptfs: replace BUG_ON with error handling code"
commit e1436df2f2550bc89d832ffd456373fdf5d5b5d7 upstream.

This reverts commit 2c2a7552dd6465e8fde6bc9cccf8d66ed1c1eb72.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

The original commit log for this change was incorrect, no "error
handling code" was added, things will blow up just as badly as before if
any of these cases ever were true.  As this BUG_ON() never fired, and
most of these checks are "obviously" never going to be true, let's just
revert to the original code for now until this gets unwound to be done
correctly in the future.

Cc: Aditya Pakki <pakki001@umn.edu>
Fixes: 2c2a7552dd64 ("ecryptfs: replace BUG_ON with error handling code")
Cc: stable <stable@vger.kernel.org>
Acked-by: Tyler Hicks <code@tyhicks.com>
Link: https://lore.kernel.org/r/20210503115736.2104747-49-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
94deabc3da Revert "video: imsttfb: fix potential NULL pointer dereferences"
commit ed04fe8a0e87d7b5ea17d47f4ac9ec962b24814a upstream.

This reverts commit 1d84353d205a953e2381044953b7fa31c8c9702d.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

The original commit here, while technically correct, did not fully
handle all of the reported issues that the commit stated it was fixing,
so revert it until it can be "fixed" fully.

Note, ioremap() probably will never fail for old hardware like this, and
if anyone actually used this hardware (a PowerMac era PCI display card),
they would not be using fbdev anymore.

Cc: Kangjie Lu <kjlu@umn.edu>
Cc: Aditya Pakki <pakki001@umn.edu>
Cc: Finn Thain <fthain@telegraphics.com.au>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Fixes: 1d84353d205a ("video: imsttfb: fix potential NULL pointer dereferences")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-67-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
ec19a4fba5 Revert "hwmon: (lm80) fix a missing check of bus read in lm80 probe"
commit 99ae3417672a6d4a3bf68d4fc43d7c6ca074d477 upstream.

This reverts commit 9aa3aa15f4c2f74f47afd6c5db4b420fadf3f315.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, it was determined that this commit is not needed at all so
just revert it.  Also, the call to lm80_init_client() was not properly
handled, so if error handling is needed in the lm80_probe() function,
then it should be done properly, not half-baked like the commit being
reverted here did.

Cc: Kangjie Lu <kjlu@umn.edu>
Fixes: 9aa3aa15f4c2 ("hwmon: (lm80) fix a missing check of bus read in lm80 probe")
Cc: stable <stable@vger.kernel.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210503115736.2104747-5-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
f7bce372a9 Revert "leds: lp5523: fix a missing check of return value of lp55xx_read"
commit 8d1beda5f11953ffe135a5213287f0b25b4da41b upstream.

This reverts commit 248b57015f35c94d4eae2fdd8c6febf5cd703900.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

The original commit does not properly unwind if there is an error
condition so it needs to be reverted at this point in time.

Cc: Kangjie Lu <kjlu@umn.edu>
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Cc: stable <stable@vger.kernel.org>
Fixes: 248b57015f35 ("leds: lp5523: fix a missing check of return value of lp55xx_read")
Link: https://lore.kernel.org/r/20210503115736.2104747-9-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:34 +02:00
Greg Kroah-Hartman
84a7ffe7a4 Revert "net: stmicro: fix a missing check of clk_prepare"
commit bee1b0511844c8c79fccf1f2b13472393b6b91f7 upstream.

This reverts commit f86a3b83833e7cfe558ca4d70b64ebc48903efec.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

The original commit causes a memory leak when it is trying to claim it
is properly handling errors.  Revert this change and fix it up properly
in a follow-on commit.

Cc: Kangjie Lu <kjlu@umn.edu>
Cc: David S. Miller <davem@davemloft.net>
Fixes: f86a3b83833e ("net: stmicro: fix a missing check of clk_prepare")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-21-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
Greg Kroah-Hartman
84c19f6a5c Revert "video: hgafb: fix potential NULL pointer dereference"
commit 58c0cc2d90f1e37c4eb63ae7f164c83830833f78 upstream.

This reverts commit ec7f6aad57ad29e4e66cc2e18e1e1599ddb02542.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

This patch "looks" correct, but the driver keeps on running and will
fail horribly right afterward if this error condition ever trips.

So points for trying to resolve an issue, but a huge NEGATIVE value for
providing a "fake" fix for the problem as nothing actually got resolved
at all.  I'll go fix this up properly...

Cc: Kangjie Lu <kjlu@umn.edu>
Cc: Aditya Pakki <pakki001@umn.edu>
Cc: Ferenc Bakonyi <fero@drama.obuda.kando.hu>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Fixes: ec7f6aad57ad ("video: hgafb: fix potential NULL pointer dereference")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-39-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
Mikulas Patocka
1ff004c41c dm snapshot: fix crash with transient storage and zero chunk size
commit c699a0db2d62e3bbb7f0bf35c87edbc8d23e3062 upstream.

The following commands will crash the kernel:

modprobe brd rd_size=1048576
dmsetup create o --table "0 `blockdev --getsize /dev/ram0` snapshot-origin /dev/ram0"
dmsetup create s --table "0 `blockdev --getsize /dev/ram0` snapshot /dev/ram0 /dev/ram1 N 0"

The reason is that when we test for zero chunk size, we jump to the label
bad_read_metadata without setting the "r" variable. The function
snapshot_ctr destroys all the structures and then exits with "r == 0". The
kernel then crashes because it falsely believes that snapshot_ctr
succeeded.

In order to fix the bug, we set the variable "r" to -EINVAL.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
Jan Beulich
3ad47f4a7a xen-pciback: reconfigure also from backend watch handler
commit c81d3d24602540f65256f98831d0a25599ea6b87 upstream.

When multiple PCI devices get assigned to a guest right at boot, libxl
incrementally populates the backend tree. The writes for the first of
the devices trigger the backend watch. In turn xen_pcibk_setup_backend()
will set the XenBus state to Initialised, at which point no further
reconfigures would happen unless a device got hotplugged. Arrange for
reconfigure to also get triggered from the backend watch handler.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: stable@vger.kernel.org
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/2337cbd6-94b9-4187-9862-c03ea12e0c61@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
Greg Kroah-Hartman
c5fc7a18c0 Revert "serial: mvebu-uart: Fix to avoid a potential NULL pointer dereference"
commit 754f39158441f4c0d7a8255209dd9a939f08ce80 upstream.

This reverts commit 32f47179833b63de72427131169809065db6745e.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be not be needed at all as the
change was useless because this function can only be called when
of_match_device matched on something.  So it should be reverted.

Cc: Aditya Pakki <pakki001@umn.edu>
Cc: stable <stable@vger.kernel.org>
Fixes: 32f47179833b ("serial: mvebu-uart: Fix to avoid a potential NULL pointer dereference")
Acked-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-6-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
Anirudh Rayabharam
4e2c772c90 rapidio: handle create_workqueue() failure
commit 69ce3ae36dcb03cdf416b0862a45369ddbf50fdf upstream.

In case create_workqueue() fails, release all resources and return -ENOMEM
to caller to avoid potential NULL pointer deref later. Move up the
create_workequeue() call to return early and avoid unwinding the call to
riocm_rx_fill().

Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com>
Link: https://lore.kernel.org/r/20210503115736.2104747-46-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
Greg Kroah-Hartman
15d3547758 Revert "rapidio: fix a NULL pointer dereference when create_workqueue() fails"
commit 5e68b86c7b7c059c0f0ec4bf8adabe63f84a61eb upstream.

This reverts commit 23015b22e47c5409620b1726a677d69e5cd032ba.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

The original commit has a memory leak on the error path here, it does
not clean up everything properly.

Cc: Kangjie Lu <kjlu@umn.edu>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Fixes: 23015b22e47c ("rapidio: fix a NULL pointer dereference when create_workqueue() fails")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-45-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
PeiSen Hou
5407ea9f5c ALSA: hda/realtek: Add some CLOVE SSIDs of ALC293
commit 1d5cfca286178ce81fb0c8a5f5777ef123cd69e4 upstream.

Fix "use as headset mic, without its own jack detect" problen.

Signed-off-by: PeiSen Hou <pshou@realtek.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/d0746eaf29f248a5acc30313e3ba4f99@realtek.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
Hui Wang
35014b745c ALSA: hda/realtek: reset eapd coeff to default value for alc287
commit 8822702f6e4c8917c83ba79e0ebf2c8c218910d4 upstream.

Ubuntu users reported an audio bug on the Lenovo Yoga Slim 7 14IIL05,
he installed dual OS (Windows + Linux), if he booted to the Linux
from Windows, the Speaker can't work well, it has crackling noise,
if he poweroff the machine first after Windows, the Speaker worked
well.

Before rebooting or shutdown from Windows, the Windows changes the
codec eapd coeff value, but the BIOS doesn't re-initialize its value,
when booting into the Linux from Windows, the eapd coeff value is not
correct. To fix it, set the codec default value to that coeff register
in the alsa driver.

BugLink: http://bugs.launchpad.net/bugs/1925057
Suggested-by: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/20210507024452.8300-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
Greg Kroah-Hartman
14b3bb3da6 Revert "ALSA: sb8: add a check for request_region"
commit 94f88309f201821073f57ae6005caefa61bf7b7e upstream.

This reverts commit dcd0feac9bab901d5739de51b3f69840851f8919.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted.  It will be fixed up "correctly" in a
later kernel change.

The original commit message for this change was incorrect as the code
path can never result in a NULL dereference, alluding to the fact that
whatever tool was used to "find this" is broken.  It's just an optional
resource reservation, so removing this check is fine.

Cc: Kangjie Lu <kjlu@umn.edu>
Acked-by: Takashi Iwai <tiwai@suse.de>
Fixes: dcd0feac9bab ("ALSA: sb8: add a check for request_region")
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210503115736.2104747-35-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
Takashi Sakamoto
0550a986f6 ALSA: bebob/oxfw: fix Kconfig entry for Mackie d.2 Pro
commit 0edabdfe89581669609eaac5f6a8d0ae6fe95e7f upstream.

Mackie d.2 has an extension card for IEEE 1394 communication, which uses
BridgeCo DM1000 ASIC. On the other hand, Mackie d.4 Pro has built-in
function for IEEE 1394 communication by Oxford Semiconductor OXFW971,
according to schematic diagram available in Mackie website. Although I
misunderstood that Mackie d.2 Pro would be also a model with OXFW971,
it's wrong. Mackie d.2 Pro is a model which includes the extension card
as factory settings.

This commit fixes entries in Kconfig and comment in ALSA OXFW driver.

Cc: <stable@vger.kernel.org>
Fixes: fd6f4b0dc167 ("ALSA: bebob: Add skelton for BeBoB based devices")
Fixes: ec4dba5053e1 ("ALSA: oxfw: Add support for Behringer/Mackie devices")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210513125652.110249-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:33 +02:00
Takashi Iwai
c841d7adb8 ALSA: usb-audio: Validate MS endpoint descriptors
commit e84749a78dc82bc545f12ce009e3dbcc2c5a8a91 upstream.

snd_usbmidi_get_ms_info() may access beyond the border when a
malformed descriptor is passed.  This patch adds the sanity checks of
the given MS endpoint descriptors, and skips invalid ones.

Reported-by: syzbot+6bb23a5d5548b93c94aa@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210510150659.17710-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:32 +02:00
Takashi Sakamoto
52b18cb684 ALSA: dice: fix stream format at middle sampling rate for Alesis iO 26
commit 1b6604896e78969baffc1b6cc6bc175f95929ac4 upstream.

Alesis iO 26 FireWire has two pairs of digital optical interface. It
delivers PCM frames from the interfaces by second isochronous packet
streaming. Although both of the interfaces are available at 44.1/48.0
kHz, first one of them is only available at 88.2/96.0 kHz. It reduces
the number of PCM samples to 4 in Multi Bit Linear Audio data channel
of data blocks on the second isochronous packet streaming.

This commit fixes hardcoded stream formats.

Cc: <stable@vger.kernel.org>
Fixes: 28b208f600a3 ("ALSA: dice: add parameters of stream formats for models produced by Alesis")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210513125652.110249-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:32 +02:00
Takashi Iwai
fe6ca009bf ALSA: line6: Fix racy initialization of LINE6 MIDI
commit 05ca447630334c323c9e2b788b61133ab75d60d3 upstream.

The initialization of MIDI devices that are found on some LINE6
drivers are currently done in a racy way; namely, the MIDI buffer
instance is allocated and initialized in each private_init callback
while the communication with the interface is already started via
line6_init_cap_control() call before that point.  This may lead to
Oops in line6_data_received() when a spurious event is received, as
reported by syzkaller.

This patch moves the MIDI initialization to line6_init_cap_control()
as well instead of the too-lately-called private_init for avoiding the
race.  Also this reduces slightly more lines, so it's a win-win
change.

Reported-by: syzbot+0d2b3feb0a2887862e06@syzkallerlkml..appspotmail.com
Link: https://lore.kernel.org/r/000000000000a4be9405c28520de@google.com
Link: https://lore.kernel.org/r/20210517132725.GA50495@hyeyoo
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210518083939.1927-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:32 +02:00
Takashi Sakamoto
c9e99de7ca ALSA: dice: fix stream format for TC Electronic Konnekt Live at high sampling transfer frequency
commit 4c6fe8c547e3c9e8c15dabdd23c569ee0df3adb1 upstream.

At high sampling transfer frequency, TC Electronic Konnekt Live
transfers/receives 6 audio data frames in multi bit linear audio data
channel of data block in CIP payload. Current hard-coded stream format
is wrong.

Cc: <stable@vger.kernel.org>
Fixes: f1f0f330b1d0 ("ALSA: dice: add parameters of stream formats for models produced by TC Electronic")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210518012612.37268-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:32 +02:00
Ronnie Sahlberg
4e95d8160a cifs: fix memory leak in smb2_copychunk_range
commit d201d7631ca170b038e7f8921120d05eec70d7c5 upstream.

When using smb2_copychunk_range() for large ranges we will
run through several iterations of a loop calling SMB2_ioctl()
but never actually free the returned buffer except for the final
iteration.
This leads to memory leaks everytime a large copychunk is requested.

Fixes: 9bf0c9cd4314 ("CIFS: Fix SMB2/SMB3 Copy offload support (refcopy) for large files")
Cc: <stable@vger.kernel.org>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 11:48:32 +02:00
Zqiang
b31395e0d1 locking/mutex: clear MUTEX_FLAGS if wait_list is empty due to signal
[ Upstream commit 3a010c493271f04578b133de977e0e5dd2848cea ]

When a interruptible mutex locker is interrupted by a signal
without acquiring this lock and removed from the wait queue.
if the mutex isn't contended enough to have a waiter
put into the wait queue again, the setting of the WAITER
bit will force mutex locker to go into the slowpath to
acquire the lock every time, so if the wait queue is empty,
the WAITER bit need to be clear.

Fixes: 040a0a371005 ("mutex: Add support for wound/wait style locks")
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210517034005.30828-1-qiang.zhang@windriver.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-26 11:48:32 +02:00
Daniel Wagner
6671cd54fd nvmet: seset ns->file when open fails
[ Upstream commit 85428beac80dbcace5b146b218697c73e367dcf5 ]

Reset the ns->file value to NULL also in the error case in
nvmet_file_ns_enable().

The ns->file variable points either to file object or contains the
error code after the filp_open() call. This can lead to following
problem:

When the user first setups an invalid file backend and tries to enable
the ns, it will fail. Then the user switches over to a bdev backend
and enables successfully the ns. The first received I/O will crash the
system because the IO backend is chosen based on the ns->file value:

static u16 nvmet_parse_io_cmd(struct nvmet_req *req)
{
	[...]

	if (req->ns->file)
		return nvmet_file_parse_io_cmd(req);

	return nvmet_bdev_parse_io_cmd(req);
}

Reported-by: Enzo Matsumiya <ematsumiya@suse.com>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-26 11:48:32 +02:00
Oleg Nesterov
365e5534cf ptrace: make ptrace() fail if the tracee changed its pid unexpectedly
[ Upstream commit dbb5afad100a828c97e012c6106566d99f041db6 ]

Suppose we have 2 threads, the group-leader L and a sub-theread T,
both parked in ptrace_stop(). Debugger tries to resume both threads
and does

	ptrace(PTRACE_CONT, T);
	ptrace(PTRACE_CONT, L);

If the sub-thread T execs in between, the 2nd PTRACE_CONT doesn not
resume the old leader L, it resumes the post-exec thread T which was
actually now stopped in PTHREAD_EVENT_EXEC. In this case the
PTHREAD_EVENT_EXEC event is lost, and the tracer can't know that the
tracee changed its pid.

This patch makes ptrace() fail in this case until debugger does wait()
and consumes PTHREAD_EVENT_EXEC which reports old_pid. This affects all
ptrace requests except the "asynchronous" PTRACE_INTERRUPT/KILL.

The patch doesn't add the new PTRACE_ option to not complicate the API,
and I _hope_ this won't cause any noticeable regression:

	- If debugger uses PTRACE_O_TRACEEXEC and the thread did an exec
	  and the tracer does a ptrace request without having consumed
	  the exec event, it's 100% sure that the thread the ptracer
	  thinks it is targeting does not exist anymore, or isn't the
	  same as the one it thinks it is targeting.

	- To some degree this patch adds nothing new. In the scenario
	  above ptrace(L) can fail with -ESRCH if it is called after the
	  execing sub-thread wakes the leader up and before it "steals"
	  the leader's pid.

Test-case:

	#include <stdio.h>
	#include <unistd.h>
	#include <signal.h>
	#include <sys/ptrace.h>
	#include <sys/wait.h>
	#include <errno.h>
	#include <pthread.h>
	#include <assert.h>

	void *tf(void *arg)
	{
		execve("/usr/bin/true", NULL, NULL);
		assert(0);

		return NULL;
	}

	int main(void)
	{
		int leader = fork();
		if (!leader) {
			kill(getpid(), SIGSTOP);

			pthread_t th;
			pthread_create(&th, NULL, tf, NULL);
			for (;;)
				pause();

			return 0;
		}

		waitpid(leader, NULL, WSTOPPED);

		ptrace(PTRACE_SEIZE, leader, 0,
				PTRACE_O_TRACECLONE | PTRACE_O_TRACEEXEC);
		waitpid(leader, NULL, 0);

		ptrace(PTRACE_CONT, leader, 0,0);
		waitpid(leader, NULL, 0);

		int status, thread = waitpid(-1, &status, 0);
		assert(thread > 0 && thread != leader);
		assert(status == 0x80137f);

		ptrace(PTRACE_CONT, thread, 0,0);
		/*
		 * waitid() because waitpid(leader, &status, WNOWAIT) does not
		 * report status. Why ????
		 *
		 * Why WEXITED? because we have another kernel problem connected
		 * to mt-exec.
		 */
		siginfo_t info;
		assert(waitid(P_PID, leader, &info, WSTOPPED|WEXITED|WNOWAIT) == 0);
		assert(info.si_pid == leader && info.si_status == 0x0405);

		/* OK, it sleeps in ptrace(PTRACE_EVENT_EXEC == 0x04) */
		assert(ptrace(PTRACE_CONT, leader, 0,0) == -1);
		assert(errno == ESRCH);

		assert(leader == waitpid(leader, &status, WNOHANG));
		assert(status == 0x04057f);

		assert(ptrace(PTRACE_CONT, leader, 0,0) == 0);

		return 0;
	}

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Simon Marchi <simon.marchi@efficios.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Pedro Alves <palves@redhat.com>
Acked-by: Simon Marchi <simon.marchi@efficios.com>
Acked-by: Jan Kratochvil <jan.kratochvil@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-26 11:48:32 +02:00
Hans de Goede
75cfc833da platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios
[ Upstream commit 3a53587423d25c87af4b4126a806a0575104b45e ]

init_dell_smbios_wmi() only registers the dell_smbios_wmi_driver on systems
where the Dell WMI interface is supported. While exit_dell_smbios_wmi()
unregisters it unconditionally, this leads to the following oops:

[  175.722921] ------------[ cut here ]------------
[  175.722925] Unexpected driver unregister!
[  175.722939] WARNING: CPU: 1 PID: 3630 at drivers/base/driver.c:194 driver_unregister+0x38/0x40
...
[  175.723089] Call Trace:
[  175.723094]  cleanup_module+0x5/0xedd [dell_smbios]
...
[  175.723148] ---[ end trace 064c34e1ad49509d ]---

Make the unregister happen on the same condition the register happens
to fix this.

Cc: Mario Limonciello <mario.limonciello@outlook.com>
Fixes: 1a258e670434 ("platform/x86: dell-smbios-wmi: Add new WMI dispatcher driver")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mario Limonciello <mario.limonciello@outlook.com>
Reviewed-by: Mark Gross <mgross@linux.intel.com>
Link: https://lore.kernel.org/r/20210518125027.21824-1-hdegoede@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-26 11:48:32 +02:00
Maor Gottlieb
f64444a213 RDMA/mlx5: Recover from fatal event in dual port mode
[ Upstream commit 97f30d324ce6645a4de4ffb71e4ae9b8ca36ff04 ]

When there is fatal event on the slave port, the device is marked as not
active. We need to mark it as active again when the slave is recovered to
regain full functionality.

Fixes: d69a24e03659 ("IB/mlx5: Move IB event processing onto a workqueue")
Link: https://lore.kernel.org/r/8906754455bb23019ef223c725d2c0d38acfb80b.1620711734.git.leonro@nvidia.com
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-26 11:48:32 +02:00
Zhen Lei
bff40e0b05 scsi: qla2xxx: Fix error return code in qla82xx_write_flash_dword()
[ Upstream commit 5cb289bf2d7c34ca1abd794ce116c4f19185a1d4 ]

Fix to return a negative error code from the error handling case instead of
0 as done elsewhere in this function.

Link: https://lore.kernel.org/r/20210514090952.6715-1-thunder.leizhen@huawei.com
Fixes: a9083016a531 ("[SCSI] qla2xxx: Add ISP82XX support.")
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-26 11:48:32 +02:00
Leon Romanovsky
f3783c415b RDMA/rxe: Clear all QP fields if creation failed
[ Upstream commit 67f29896fdc83298eed5a6576ff8f9873f709228 ]

rxe_qp_do_cleanup() relies on valid pointer values in QP for the properly
created ones, but in case rxe_qp_from_init() failed it was filled with
garbage and caused tot the following error.

  refcount_t: underflow; use-after-free.
  WARNING: CPU: 1 PID: 12560 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28
  Modules linked in:
  CPU: 1 PID: 12560 Comm: syz-executor.4 Not tainted 5.12.0-syzkaller #0
  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
  RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 lib/refcount.c:28
  Code: e9 db fe ff ff 48 89 df e8 2c c2 ea fd e9 8a fe ff ff e8 72 6a a7 fd 48 c7 c7 e0 b2 c1 89 c6 05 dc 3a e6 09 01 e8 ee 74 fb 04 <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55
  RSP: 0018:ffffc900097ceba8 EFLAGS: 00010286
  RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
  RDX: 0000000000040000 RSI: ffffffff815bb075 RDI: fffff520012f9d67
  RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
  R10: ffffffff815b4eae R11: 0000000000000000 R12: ffff8880322a4800
  R13: ffff8880322a4940 R14: ffff888033044e00 R15: 0000000000000000
  FS:  00007f6eb2be3700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00007fdbe5d41000 CR3: 000000001d181000 CR4: 00000000001506e0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  Call Trace:
   __refcount_sub_and_test include/linux/refcount.h:283 [inline]
   __refcount_dec_and_test include/linux/refcount.h:315 [inline]
   refcount_dec_and_test include/linux/refcount.h:333 [inline]
   kref_put include/linux/kref.h:64 [inline]
   rxe_qp_do_cleanup+0x96f/0xaf0 drivers/infiniband/sw/rxe/rxe_qp.c:805
   execute_in_process_context+0x37/0x150 kernel/workqueue.c:3327
   rxe_elem_release+0x9f/0x180 drivers/infiniband/sw/rxe/rxe_pool.c:391
   kref_put include/linux/kref.h:65 [inline]
   rxe_create_qp+0x2cd/0x310 drivers/infiniband/sw/rxe/rxe_verbs.c:425
   _ib_create_qp drivers/infiniband/core/core_priv.h:331 [inline]
   ib_create_named_qp+0x2ad/0x1370 drivers/infiniband/core/verbs.c:1231
   ib_create_qp include/rdma/ib_verbs.h:3644 [inline]
   create_mad_qp+0x177/0x2d0 drivers/infiniband/core/mad.c:2920
   ib_mad_port_open drivers/infiniband/core/mad.c:3001 [inline]
   ib_mad_init_device+0xd6f/0x1400 drivers/infiniband/core/mad.c:3092
   add_client_context+0x405/0x5e0 drivers/infiniband/core/device.c:717
   enable_device_and_get+0x1cd/0x3b0 drivers/infiniband/core/device.c:1331
   ib_register_device drivers/infiniband/core/device.c:1413 [inline]
   ib_register_device+0x7c7/0xa50 drivers/infiniband/core/device.c:1365
   rxe_register_device+0x3d5/0x4a0 drivers/infiniband/sw/rxe/rxe_verbs.c:1147
   rxe_add+0x12fe/0x16d0 drivers/infiniband/sw/rxe/rxe.c:247
   rxe_net_add+0x8c/0xe0 drivers/infiniband/sw/rxe/rxe_net.c:503
   rxe_newlink drivers/infiniband/sw/rxe/rxe.c:269 [inline]
   rxe_newlink+0xb7/0xe0 drivers/infiniband/sw/rxe/rxe.c:250
   nldev_newlink+0x30e/0x550 drivers/infiniband/core/nldev.c:1555
   rdma_nl_rcv_msg+0x36d/0x690 drivers/infiniband/core/netlink.c:195
   rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline]
   rdma_nl_rcv+0x2ee/0x430 drivers/infiniband/core/netlink.c:259
   netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
   netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338
   netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927
   sock_sendmsg_nosec net/socket.c:654 [inline]
   sock_sendmsg+0xcf/0x120 net/socket.c:674
   ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350
   ___sys_sendmsg+0xf3/0x170 net/socket.c:2404
   __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433
   do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
   entry_SYSCALL_64_after_hwframe+0x44/0xae

Fixes: 8700e3e7c485 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/7bf8d548764d406dbbbaf4b574960ebfd5af8387.1620717918.git.leonro@nvidia.com
Reported-by: syzbot+36a7f280de4e11c6f04e@syzkaller.appspotmail.com
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Zhu Yanjun <zyjzyj2000@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-26 11:48:31 +02:00
Christophe JAILLET
2f25cf4290 openrisc: Fix a memory leak
[ Upstream commit c019d92457826bb7b2091c86f36adb5de08405f9 ]

'setup_find_cpu_node()' take a reference on the node it returns.
This reference must be decremented when not needed anymore, or there will
be a leak.

Add the missing 'of_node_put(cpu)'.

Note that 'setup_cpuinfo()' that also calls this function already has a
correct 'of_node_put(cpu)' at its end.

Fixes: 9d02a4283e9c ("OpenRISC: Boot code")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-05-26 11:48:31 +02:00