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At least not in the sense described here: it delineates UFS cylinder
groups, is never assigned, and the only macro that incorporates it
(ufs_cg_chkmagic; the second one is unused) is used to detect CGs and
protect from filesystem corruption
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Link: https://lore.kernel.org/r/a508477cfeb18eca4a24c29836f809fe34f20467.1663280877.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
English and it magic-number.rsts were updated when these were removed;
the zh translations weren't
This equalises these lists to be the same across all translations
Automated:
grep MAGIC Documentation/translations/process/zh_TW/magic-number.rst |
while read -r mag _; do git grep -wF "$mag" | grep -vq \
'^Documentation.*magic-number.rst:' || sed -i "/^$mag/d" \
./Documentation/{,translations/{zh_CN,zh_TW,it_IT}/}process/magic-number.rst
; done
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Link: https://lore.kernel.org/r/5d9fa062178c45822a600a723f6f71fdb92011f3.1663280877.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In fs/hfs, the only magic is for delineating on-disk block types,
of which HFS_DRVR_DESC_MAGIC HFS_MFS_SUPER_MAGIC are define-only,
but they're out of scope for magic-number.rst
Magic numbers as described there were all removed, along their defines,
in the 2.6.4 "HFS rewrite", pre-git
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Link: https://lore.kernel.org/r/e67cec702a7ab34a8c5f7966d930d793a097a90f.1663280877.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The last user was removed in the 2.6.4 "MIPS mega-patch", pre-git
Found with
grep MAGIC Documentation/process/magic-number.rst | while read -r mag _;
do git grep -wF "$mag" | grep -ve '^Documentation.*magic-number.rst:' \
-qe ':#define '"$mag" || git grep -wF "$mag" | while IFS=: read -r f _;
do sed -i '/\b'"$mag"'\b/d' "$f"; done ; done
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Link: https://lore.kernel.org/r/c2e7510beebdd698e20d0704712e623fad00fc1c.1663280877.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Appeared in its present state in pre-git (2.5.41), never used
Found with
grep MAGIC Documentation/process/magic-number.rst | while read -r mag _;
do git grep -wF "$mag" | grep -ve '^Documentation.*magic-number.rst:' \
-qe ':#define '"$mag" || git grep -wF "$mag" | while IFS=: read -r f _;
do sed -i '/\b'"$mag"'\b/d' "$f"; done ; done
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Link: https://lore.kernel.org/r/f6d375201dfd99416ea03b49b3dd40af56c1537e.1663280877.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The last user was removed in 5.1 in
commit 08300f4402 ("a.out: remove core dumping support")
but this is part of the UAPI headers, so this may want to either wait
until a.out is removed entirely, or be removed from the magic number doc
and silently remain in the header
A cursory glance on DCS didn't show any user code actually using this
value
Found with
grep MAGIC Documentation/process/magic-number.rst | while read -r mag _;
do git grep -wF "$mag" | grep -ve '^Documentation.*magic-number.rst:' \
-qe ':#define '"$mag" || git grep -wF "$mag" | while IFS=: read -r f _;
do sed -i '/\b'"$mag"'\b/d' "$f"; done ; done
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Link: https://lore.kernel.org/r/9cbea062df7125ef43e2e0b2a67ede6ad1c5f27e.1663280877.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The entire file blames back to the start of git
(minus whitespace from the RST translation and a typo fix):
* there are changelog comments for March 1994 through to Linux 2.5.74
* struct tty_ldisc is two pointers nowadays, so naturally no magic
* GDA_MAGIC is defined but unused, and it's been this way
since start-of-git
* M3_CARD_MAGIC isn't defined, because
commit d56b9b9c46 ("[PATCH] The scheduled removal of some OSS
drivers") removed the entire driver in 2006
* CS_CARD_MAGIC likewise since
commit b5d425c97f ("more scheduled OSS driver removal") in 2007
* KMALLOC_MAGIC and VMALLOC_MAGIC were removed in
commit e38e0cfa48 ("[ALSA] Remove kmalloc wrappers"),
six months after start of git
* SLAB_C_MAGIC has never even appeared in git
(removed in 2.4.0-test3pre6)
magic-number.rst is a low-value historial relic at best and
misleading cruft at worst, so start with cleaning out ones that only
appear therein
Automated:
grep MAGIC Documentation/process/magic-number.rst | while read -r mag _;
do git grep -wF "$mag" | grep -vq '^Documentation.*magic-number.rst:' ||
sed -i "/^$mag/d" \
Documentation/{,translations/{zh_CN,zh_TW,it_IT}/}process/magic-number.rst
done
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Link: https://lore.kernel.org/r/8389a7b85b5c660c6891b1740b5dacc53491a41b.1663280877.git.nabijaczleweli@nabijaczleweli.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In following scenario(diagram), when one thread X running dev_coredumpm()
adds devcd device to the framework which sends uevent notification to
userspace and another thread Y reads this uevent and call to
devcd_data_write() which eventually try to delete the queued timer that
is not initialized/queued yet.
So, debug object reports some warning and in the meantime, timer is
initialized and queued from X path. and from Y path, it gets reinitialized
again and timer->entry.pprev=NULL and try_to_grab_pending() stucks.
To fix this, introduce mutex and a boolean flag to serialize the behaviour.
cpu0(X) cpu1(Y)
dev_coredump() uevent sent to user space
device_add() ======================> user space process Y reads the
uevents writes to devcd fd
which results into writes to
devcd_data_write()
mod_delayed_work()
try_to_grab_pending()
del_timer()
debug_assert_init()
INIT_DELAYED_WORK()
schedule_delayed_work()
debug_object_fixup()
timer_fixup_assert_init()
timer_setup()
do_init_timer()
/*
Above call reinitializes
the timer to
timer->entry.pprev=NULL
and this will be checked
later in timer_pending() call.
*/
timer_pending()
!hlist_unhashed_lockless(&timer->entry)
!h->pprev
/*
del_timer() checks h->pprev and finds
it to be NULL due to which
try_to_grab_pending() stucks.
*/
Link: https://lore.kernel.org/lkml/2e1f81e2-428c-f11f-ce92-eb11048cb271@quicinc.com/
Signed-off-by: Mukesh Ojha <quic_mojha@quicinc.com>
Link: https://lore.kernel.org/r/1663073424-13663-1-git-send-email-quic_mojha@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Users may have explicitly configured their debugfs permissions; we
shouldn't overwrite those just because a second mount appeared.
Only clobber if the options were provided at mount time.
Existing behavior:
## Pre-existing status: debugfs is 0755.
# chmod 755 /sys/kernel/debug/
# stat -c '%A' /sys/kernel/debug/
drwxr-xr-x
## New mount sets kernel-default permissions:
# mount -t debugfs none /mnt/foo
# stat -c '%A' /mnt/foo
drwx------
## Unexpected: the original mount changed permissions:
# stat -c '%A' /sys/kernel/debug
drwx------
New behavior:
## Pre-existing status: debugfs is 0755.
# chmod 755 /sys/kernel/debug/
# stat -c '%A' /sys/kernel/debug/
drwxr-xr-x
## New mount inherits existing permissions:
# mount -t debugfs none /mnt/foo
# stat -c '%A' /mnt/foo
drwxr-xr-x
## Expected: old mount is unchanged:
# stat -c '%A' /sys/kernel/debug
drwxr-xr-x
Full test cases are being submitted to LTP.
Signed-off-by: Brian Norris <briannorris@chromium.org>
Link: https://lore.kernel.org/r/20220912163042.v3.1.Icbd40fce59f55ad74b80e5d435ea233579348a78@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This merges the driver core changes in 6.0-rc7 into driver-core-next as
they are needed here as well for testing.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Here are two tiny driver core fixes for 6.0-rc7 that resolve some
oft-reported problems.
The first is a revert of the "fw_devlink.strict=1" default option that
we keep trying to enable, but we keep finding platforms that this just
breaks everything on. So again, we need it reverted and hopefully it
can be worked on in future releases.
The second is a sysfs file-size bugfix that resolves an issue that many
people are starting to hit as the fix it is fixing also was backported
to stable kernels. The util-linux developers are starting to get
bugreports about sysfs files that contain no data because of this
problem, and this fix which has been in linux-next in the bitfield tree
for a long time, resolves it. I'm submitting it here as it needs to be
merged for 6.0-final, not for 6.1-rc1.
Both of these have been in linux-next with no reported issues, only
reports were that these fixed problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are two tiny driver core fixes for 6.0-rc7 that resolve some
oft-reported problems.
The first is a revert of the "fw_devlink.strict=1" default option that
we keep trying to enable, but we keep finding platforms that this just
breaks everything on. So again, we need it reverted and hopefully it
can be worked on in future releases.
The second is a sysfs file-size bugfix that resolves an issue that
many people are starting to hit as the fix it is fixing also was
backported to stable kernels. The util-linux developers are starting
to get bugreports about sysfs files that contain no data because of
this problem, and this fix which has been in linux-next in the
bitfield tree for a long time, resolves it. I'm submitting it here as
it needs to be merged for 6.0-final, not for 6.1-rc1.
Both of these have been in linux-next with no reported issues, only
reports were that these fixed problems"
* tag 'driver-core-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
drivers/base: Fix unsigned comparison to -1 in CPUMAP_FILE_MAX_BYTES
Revert "driver core: Set fw_devlink.strict=1 by default"
Here are a few small USB and Thunderbolt driver fixes and new device ids
for 6.0-rc7.
They contain:
- new usb-serial driver ids
- documentation build warning fix in USB hub code
- flexcop-usb long-posted bugfix (the v4l maintainer for this is
MIA so I have finally picked this up as it is a fix for a
reported problem.)
- dwc3 64bit DMA bugfix
- new thunderbolt device ids
- typec build error fix
All of these have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB / Thunderbolt driver fixes and ids from Greg KH:
"Here are a few small USB and Thunderbolt driver fixes and new device
ids for 6.0-rc7.
They contain:
- new usb-serial driver ids
- documentation build warning fix in USB hub code
- flexcop-usb long-posted bugfix (the v4l maintainer for this is MIA
so I have finally picked this up as it is a fix for a reported
problem.)
- dwc3 64bit DMA bugfix
- new thunderbolt device ids
- typec build error fix
All of these have been in linux-next with no reported issues"
* tag 'usb-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: typec: anx7411: Fix build error without CONFIG_POWER_SUPPLY
media: flexcop-usb: fix endpoint type check
USB: serial: option: add Quectel RM520N
USB: serial: option: add Quectel BG95 0x0203 composition
thunderbolt: Add support for Intel Maple Ridge single port controller
usb: dwc3: core: leave default DMA if the controller does not support 64-bit DMA
USB: core: Fix RST error in hub.c
* A handful of build fixes for the T-Head errata, including some
functional issues the compilers found.
* A fix for a nasty sigreturn bug.
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Merge tag 'riscv-for-linus-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
- A handful of build fixes for the T-Head errata, including some
functional issues the compilers found
- A fix for a nasty sigreturn bug
* tag 'riscv-for-linus-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
RISC-V: Avoid coupling the T-Head CMOs and Zicbom
riscv: fix a nasty sigreturn bug...
riscv: make t-head erratas depend on MMU
riscv: fix RISCV_ISA_SVPBMT kconfig dependency warning
RISC-V: Clean up the Zicbom block size probing
* Fix for kmemleak with pKVM
s390:
* Fixes for VFIO with zPCI
* smatch fix
x86:
* Ensure XSAVE-capable hosts always allow FP and SSE state to be saved
and restored via KVM_{GET,SET}_XSAVE
* Fix broken max_mmu_rmap_size stat
* Fix compile error with old glibc that doesn't have gettid()
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Paolo Bonzini:
"As everyone back came back from conferences, here are the pending
patches for Linux 6.0.
ARM:
- Fix for kmemleak with pKVM
s390:
- Fixes for VFIO with zPCI
- smatch fix
x86:
- Ensure XSAVE-capable hosts always allow FP and SSE state to be
saved and restored via KVM_{GET,SET}_XSAVE
- Fix broken max_mmu_rmap_size stat
- Fix compile error with old glibc that doesn't have gettid()"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: x86: Inject #UD on emulated XSETBV if XSAVES isn't enabled
KVM: x86: Always enable legacy FP/SSE in allowed user XFEATURES
KVM: x86: Reinstate kvm_vcpu_arch.guest_supported_xcr0
KVM: x86/mmu: add missing update to max_mmu_rmap_size
selftests: kvm: Fix a compile error in selftests/kvm/rseq_test.c
KVM: s390: pci: register pci hooks without interpretation
KVM: s390: pci: fix GAIT physical vs virtual pointers usage
KVM: s390: Pass initialized arg even if unused
KVM: s390: pci: fix plain integer as NULL pointer warnings
KVM: arm64: Use kmemleak_free_part_phys() to unregister hyp_mem_base
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Merge tag 'for-linus-6.0-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fix from Juergen Gross:
"A single fix for an issue in the xenbus driver (initialization of
multi-page rings for Xen PV devices)"
* tag 'for-linus-6.0-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/xenbus: fix xenbus_setup_ring()
i915:
- avoid a general protection failure when using perf/OA
- avoid kernel warnings on driver release
amdgpu:
- SDMA 6.x fix
- GPUVM TF fix
- DCN 3.2.x fixes
- DCN 3.1.x fixes
- SMU 13.x fixes
- Clang stack size fixes for recently enabled DML code
- Fix drm dirty callback change on non-atomic cases
- USB4 display fix
mediatek:
- dsi: Add atomic {destroy,duplicate}_state, reset callbacks
- dsi: Move mtk_dsi_stop() call back to mtk_dsi_poweroff()
- Fix wrong dither settings
hisilicon:
- Depend on MMU
mgag200:
- Fix console on G200ER
panel:
- Fix innolux_g121i1_l01 bus format
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Merge tag 'drm-fixes-2022-09-23-1' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Regular fixes for the week, i915, mediatek, hisilicon, mgag200 and
panel have some small fixes.
amdgpu has more stack size fixes for clang build, and fixes for new
IPs, but all with low regression chances since they are for stuff new
in v6.0.
i915:
- avoid a general protection failure when using perf/OA
- avoid kernel warnings on driver release
amdgpu:
- SDMA 6.x fix
- GPUVM TF fix
- DCN 3.2.x fixes
- DCN 3.1.x fixes
- SMU 13.x fixes
- Clang stack size fixes for recently enabled DML code
- Fix drm dirty callback change on non-atomic cases
- USB4 display fix
mediatek:
- dsi: Add atomic {destroy,duplicate}_state, reset callbacks
- dsi: Move mtk_dsi_stop() call back to mtk_dsi_poweroff()
- Fix wrong dither settings
hisilicon:
- Depend on MMU
mgag200:
- Fix console on G200ER
panel:
- Fix innolux_g121i1_l01 bus format"
* tag 'drm-fixes-2022-09-23-1' of git://anongit.freedesktop.org/drm/drm: (30 commits)
MAINTAINERS: switch graphics to airlied other addresses
drm/mediatek: dsi: Move mtk_dsi_stop() call back to mtk_dsi_poweroff()
drm/amd/display: Reduce number of arguments of dml314's CalculateFlipSchedule()
drm/amd/display: Reduce number of arguments of dml314's CalculateWatermarksAndDRAMSpeedChangeSupport()
drm/amdgpu: don't register a dirty callback for non-atomic
drm/amd/pm: drop the pptable related workarounds for SMU 13.0.0
drm/amd/pm: add support for 3794 pptable for SMU13.0.0
drm/amd/display: correct num_dsc based on HW cap
drm/amd/display: Disable OTG WA for the plane_state NULL case on DCN314
drm/amd/display: Add shift and mask for ICH_RESET_AT_END_OF_LINE
drm/amd/display: increase dcn315 pstate change latency
drm/amd/display: Fix DP MST timeslot issue when fallback happened
drm/amd/display: Display distortion after hotplug 5K tiled display
drm/amd/display: Update dummy P-state search to use DCN32 DML
drm/amd/display: skip audio setup when audio stream is enabled
drm/amd/display: update gamut remap if plane has changed
drm/amd/display: Assume an LTTPR is always present on fixed_vs links
drm/amd/display: fix dcn315 memory channel count and width read
drm/amd/display: Fix double cursor on non-video RGB MPO
drm/amd/display: Only consider pixle rate div policy for DCN32+
...
Fix for a code analyser warning
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Merge tag 'kvm-s390-master-6.0-2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
More pci fixes
Fix for a code analyser warning
* drm/hisilicon: Depend on MMU
* drm/mgag200: Fix console on G200ER
* drm/panel: Fix innolux_g121i1_l01 bus format
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Merge tag 'drm-misc-fixes-2022-09-22' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
Short summary of fixes pull
* drm/hisilicon: Depend on MMU
* drm/mgag200: Fix console on G200ER
* drm/panel: Fix innolux_g121i1_l01 bus format
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/YyxtXS588at6S4wg@linux-uq9g
Three small and pretty obvious fixes, all in drivers.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Three small and pretty obvious fixes, all in drivers"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: mpt3sas: Fix return value check of dma_get_required_mask()
scsi: qla2xxx: Fix memory leak in __qlt_24xx_handle_abts()
scsi: qedf: Fix a UAF bug in __qedf_probe()
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Merge tag 'slab-for-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab
Pull slab fixes from Vlastimil Babka:
- Fix a possible use-after-free in SLUB's kmem_cache removal,
introduced in this cycle, by Feng Tang.
- WQ_MEM_RECLAIM dependency fix for the workqueue-based cpu slab
flushing introduced in 5.15, by Maurizio Lombardi.
- Add missing KASAN hooks in two kmalloc entry paths, by Peter
Collingbourne.
- A BUG_ON() removal in SLUB's kmem_cache creation when allocation
fails (too small to possibly happen in practice, syzbot used fault
injection), by Chao Yu.
* tag 'slab-for-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
mm: slub: fix flush_cpu_slab()/__free_slab() invocations in task context.
mm/slab_common: fix possible double free of kmem_cache
kasan: call kasan_malloc() from __kmalloc_*track_caller()
mm/slub: fix to return errno if kmalloc() fails
Inject #UD when emulating XSETBV if CR4.OSXSAVE is not set. This also
covers the "XSAVE not supported" check, as setting CR4.OSXSAVE=1 #GPs if
XSAVE is not supported (and userspace gets to keep the pieces if it
forces incoherent vCPU state).
Add a comment to kvm_emulate_xsetbv() to call out that the CPU checks
CR4.OSXSAVE before checking for intercepts. AMD'S APM implies that #UD
has priority (says that intercepts are checked before #GP exceptions),
while Intel's SDM says nothing about interception priority. However,
testing on hardware shows that both AMD and Intel CPUs prioritize the #UD
over interception.
Fixes: 02d4160fbd ("x86: KVM: add xsetbv to the emulator")
Cc: stable@vger.kernel.org
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220824033057.3576315-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Allow FP and SSE state to be saved and restored via KVM_{G,SET}_XSAVE on
XSAVE-capable hosts even if their bits are not exposed to the guest via
XCR0.
Failing to allow FP+SSE first showed up as a QEMU live migration failure,
where migrating a VM from a pre-XSAVE host, e.g. Nehalem, to an XSAVE
host failed due to KVM rejecting KVM_SET_XSAVE. However, the bug also
causes problems even when migrating between XSAVE-capable hosts as
KVM_GET_SAVE won't set any bits in user_xfeatures if XSAVE isn't exposed
to the guest, i.e. KVM will fail to actually migrate FP+SSE.
Because KVM_{G,S}ET_XSAVE are designed to allowing migrating between
hosts with and without XSAVE, KVM_GET_XSAVE on a non-XSAVE (by way of
fpu_copy_guest_fpstate_to_uabi()) always sets the FP+SSE bits in the
header so that KVM_SET_XSAVE will work even if the new host supports
XSAVE.
Fixes: ad856280dd ("x86/kvm/fpu: Limit guest user_xfeatures to supported bits of XCR0")
bz: https://bugzilla.redhat.com/show_bug.cgi?id=2079311
Cc: stable@vger.kernel.org
Cc: Leonardo Bras <leobras@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
[sean: add comment, massage changelog]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220824033057.3576315-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reinstate the per-vCPU guest_supported_xcr0 by partially reverting
commit 988896bb6182; the implicit assessment that guest_supported_xcr0 is
always the same as guest_fpu.fpstate->user_xfeatures was incorrect.
kvm_vcpu_after_set_cpuid() isn't the only place that sets user_xfeatures,
as user_xfeatures is set to fpu_user_cfg.default_features when guest_fpu
is allocated via fpu_alloc_guest_fpstate() => __fpstate_reset().
guest_supported_xcr0 on the other hand is zero-allocated. If userspace
never invokes KVM_SET_CPUID2, supported XCR0 will be '0', whereas the
allowed user XFEATURES will be non-zero.
Practically speaking, the edge case likely doesn't matter as no sane
userspace will live migrate a VM without ever doing KVM_SET_CPUID2. The
primary motivation is to prepare for KVM intentionally and explicitly
setting bits in user_xfeatures that are not set in guest_supported_xcr0.
Because KVM_{G,S}ET_XSAVE can be used to svae/restore FP+SSE state even
if the host doesn't support XSAVE, KVM needs to set the FP+SSE bits in
user_xfeatures even if they're not allowed in XCR0, e.g. because XCR0
isn't exposed to the guest. At that point, the simplest fix is to track
the two things separately (allowed save/restore vs. allowed XCR0).
Fixes: 988896bb61 ("x86/kvm/fpu: Remove kvm_vcpu_arch.guest_supported_xcr0")
Cc: stable@vger.kernel.org
Cc: Leonardo Bras <leobras@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220824033057.3576315-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The update to statistic max_mmu_rmap_size is unintentionally removed by
commit 4293ddb788 ("KVM: x86/mmu: Remove redundant spte present check
in mmu_set_spte"). Add missing update to it or max_mmu_rmap_size will
always be nonsensical 0.
Fixes: 4293ddb788 ("KVM: x86/mmu: Remove redundant spte present check in mmu_set_spte")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Message-Id: <20220907080657.42898-1-linmiaohe@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The following warning appears when executing:
make -C tools/testing/selftests/kvm
rseq_test.c: In function ‘main’:
rseq_test.c:237:33: warning: implicit declaration of function ‘gettid’; did you mean ‘getgid’? [-Wimplicit-function-declaration]
(void *)(unsigned long)gettid());
^~~~~~
getgid
/usr/bin/ld: /tmp/ccr5mMko.o: in function `main':
../kvm/tools/testing/selftests/kvm/rseq_test.c:237: undefined reference to `gettid'
collect2: error: ld returned 1 exit status
make: *** [../lib.mk:173: ../kvm/tools/testing/selftests/kvm/rseq_test] Error 1
Use the more compatible syscall(SYS_gettid) instead of gettid() to fix it.
More subsequent reuse may cause it to be wrapped in a lib file.
Signed-off-by: Jinrong Liang <cloudliang@tencent.com>
Message-Id: <20220802071240.84626-1-cloudliang@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Commit 5a836bf6b0 ("mm: slub: move flush_cpu_slab() invocations
__free_slab() invocations out of IRQ context") moved all flush_cpu_slab()
invocations to the global workqueue to avoid a problem related
with deactivate_slab()/__free_slab() being called from an IRQ context
on PREEMPT_RT kernels.
When the flush_all_cpu_locked() function is called from a task context
it may happen that a workqueue with WQ_MEM_RECLAIM bit set ends up
flushing the global workqueue, this will cause a dependency issue.
workqueue: WQ_MEM_RECLAIM nvme-delete-wq:nvme_delete_ctrl_work [nvme_core]
is flushing !WQ_MEM_RECLAIM events:flush_cpu_slab
WARNING: CPU: 37 PID: 410 at kernel/workqueue.c:2637
check_flush_dependency+0x10a/0x120
Workqueue: nvme-delete-wq nvme_delete_ctrl_work [nvme_core]
RIP: 0010:check_flush_dependency+0x10a/0x120[ 453.262125] Call Trace:
__flush_work.isra.0+0xbf/0x220
? __queue_work+0x1dc/0x420
flush_all_cpus_locked+0xfb/0x120
__kmem_cache_shutdown+0x2b/0x320
kmem_cache_destroy+0x49/0x100
bioset_exit+0x143/0x190
blk_release_queue+0xb9/0x100
kobject_cleanup+0x37/0x130
nvme_fc_ctrl_free+0xc6/0x150 [nvme_fc]
nvme_free_ctrl+0x1ac/0x2b0 [nvme_core]
Fix this bug by creating a workqueue for the flush operation with
the WQ_MEM_RECLAIM bit set.
Fixes: 5a836bf6b0 ("mm: slub: move flush_cpu_slab() invocations __free_slab() invocations out of IRQ context")
Cc: <stable@vger.kernel.org>
Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Another set of fixes for fixes for the soc tree:
- A fix for the interrupt number on at91/lan966 ethernet PHYs
- A second round of fixes for NXP i.MX series, including a couple
of build issues, and board specific DT corrections on
TQMa8MPQL, imx8mp-venice-gw74xx and imx8mm-verdin for reliability
and partially broken functionality.
- Several fixes for Rockchip SoCs, addressing a USB issue on BPI-R2-Pro,
wakeup on Gru-Bob and reliability of high-speed SD cards, among
other minor issues.
- A fix for a long-running naming mistake that prevented the moxart mmc
driver from working at all.
- Multiple Arm SCMI firmware fixes for hardening some corner cases.
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Merge tag 'soc-fixes-6.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC fixes from Arnd Bergmann:
"Another set of fixes for fixes for the soc tree:
- A fix for the interrupt number on at91/lan966 ethernet PHYs
- A second round of fixes for NXP i.MX series, including a couple of
build issues, and board specific DT corrections on TQMa8MPQL,
imx8mp-venice-gw74xx and imx8mm-verdin for reliability and
partially broken functionality
- Several fixes for Rockchip SoCs, addressing a USB issue on
BPI-R2-Pro, wakeup on Gru-Bob and reliability of high-speed SD
cards, among other minor issues
- A fix for a long-running naming mistake that prevented the moxart
mmc driver from working at all
- Multiple Arm SCMI firmware fixes for hardening some corner cases"
* tag 'soc-fixes-6.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (30 commits)
arm64: dts: imx8mp-venice-gw74xx: fix port/phy validation
ARM: dts: lan966x: Fix the interrupt number for internal PHYs
arm64: dts: imx8mp-venice-gw74xx: fix ksz9477 cpu port
arm64: dts: imx8mp-venice-gw74xx: fix CAN STBY polarity
dt-bindings: memory-controllers: fsl,imx8m-ddrc: drop Leonard Crestez
arm64: dts: tqma8mqml: Include phy-imx8-pcie.h header
arm64: defconfig: enable ARCH_NXP
arm64: dts: imx8mp-tqma8mpql-mba8mpxl: add missing pinctrl for RTC alarm
ARM: dts: fix Moxa SDIO 'compatible', remove 'sdhci' misnomer
arm64: dts: imx8mm-verdin: extend pmic voltages
arm64: dts: rockchip: Remove 'enable-active-low' from rk3566-quartz64-a
arm64: dts: rockchip: Remove 'enable-active-low' from rk3399-puma
arm64: dts: rockchip: fix property for usb2 phy supply on rk3568-evb1-v10
arm64: dts: rockchip: fix property for usb2 phy supply on rock-3a
arm64: dts: imx8ulp: add #reset-cells for pcc
arm64: dts: tqma8mpxl-ba8mpxl: Fix button GPIOs
arm64: dts: imx8mn: remove GPU power domain reset
arm64: dts: rockchip: Set RK3399-Gru PCLK_EDP to 24 MHz
arm64: dts: imx8mm: Reverse CPLD_Dn GPIO label mapping on MX8Menlo
arm64: dts: rockchip: fix upper usb port on BPI-R2-Pro
...
A handful of awaited fixes here - revert of the FEC changes,
bluetooth fix, fixes for iwlwifi spew.
We added a warning in PHY/MDIO code which is triggering on
a couple of platforms in a false-positive-ish way. If we can't
iron that out over the week we'll drop it and re-add for 6.1.
I've added a new "follow up fixes" section for fixes to fixes
in 6.0-rcs but it may actually give the false impression that
those are problematic or that more testing time would have
caught them. So likely a one time thing.
Follow up fixes:
- nf_tables_addchain: fix nft_counters_enabled underflow
- ebtables: fix memory leak when blob is malformed
- nf_ct_ftp: fix deadlock when nat rewrite is needed
Current release - regressions:
- Revert "fec: Restart PPS after link state change"
- Revert "net: fec: Use a spinlock to guard `fep->ptp_clk_on`"
- Bluetooth: fix HCIGETDEVINFO regression
- wifi: mt76: fix 5 GHz connection regression on mt76x0/mt76x2
- mptcp: fix fwd memory accounting on coalesce
- rwlock removal fall out:
- ipmr: always call ip{,6}_mr_forward() from RCU read-side
critical section
- ipv6: fix crash when IPv6 is administratively disabled
- tcp: read multiple skbs in tcp_read_skb()
- mdio_bus_phy_resume state warning fallout:
- eth: ravb: fix PHY state warning splat during system resume
- eth: sh_eth: fix PHY state warning splat during system resume
Current release - new code bugs:
- wifi: iwlwifi: don't spam logs with NSS>2 messages
- eth: mtk_eth_soc: enable XDP support just for MT7986 SoC
Previous releases - regressions:
- bonding: fix NULL deref in bond_rr_gen_slave_id
- wifi: iwlwifi: mark IWLMEI as broken
Previous releases - always broken:
- nf_conntrack helpers:
- irc: tighten matching on DCC message
- sip: fix ct_sip_walk_headers
- osf: fix possible bogus match in nf_osf_find()
- ipvlan: fix out-of-bound bugs caused by unset skb->mac_header
- core: fix flow symmetric hash
- bonding, team: unsync device addresses on ndo_stop
- phy: micrel: fix shared interrupt on LAN8814
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Including fixes from wifi, netfilter and can.
A handful of awaited fixes here - revert of the FEC changes, bluetooth
fix, fixes for iwlwifi spew.
We added a warning in PHY/MDIO code which is triggering on a couple of
platforms in a false-positive-ish way. If we can't iron that out over
the week we'll drop it and re-add for 6.1.
I've added a new "follow up fixes" section for fixes to fixes in
6.0-rcs but it may actually give the false impression that those are
problematic or that more testing time would have caught them. So
likely a one time thing.
Follow up fixes:
- nf_tables_addchain: fix nft_counters_enabled underflow
- ebtables: fix memory leak when blob is malformed
- nf_ct_ftp: fix deadlock when nat rewrite is needed
Current release - regressions:
- Revert "fec: Restart PPS after link state change" and the related
"net: fec: Use a spinlock to guard `fep->ptp_clk_on`"
- Bluetooth: fix HCIGETDEVINFO regression
- wifi: mt76: fix 5 GHz connection regression on mt76x0/mt76x2
- mptcp: fix fwd memory accounting on coalesce
- rwlock removal fall out:
- ipmr: always call ip{,6}_mr_forward() from RCU read-side
critical section
- ipv6: fix crash when IPv6 is administratively disabled
- tcp: read multiple skbs in tcp_read_skb()
- mdio_bus_phy_resume state warning fallout:
- eth: ravb: fix PHY state warning splat during system resume
- eth: sh_eth: fix PHY state warning splat during system resume
Current release - new code bugs:
- wifi: iwlwifi: don't spam logs with NSS>2 messages
- eth: mtk_eth_soc: enable XDP support just for MT7986 SoC
Previous releases - regressions:
- bonding: fix NULL deref in bond_rr_gen_slave_id
- wifi: iwlwifi: mark IWLMEI as broken
Previous releases - always broken:
- nf_conntrack helpers:
- irc: tighten matching on DCC message
- sip: fix ct_sip_walk_headers
- osf: fix possible bogus match in nf_osf_find()
- ipvlan: fix out-of-bound bugs caused by unset skb->mac_header
- core: fix flow symmetric hash
- bonding, team: unsync device addresses on ndo_stop
- phy: micrel: fix shared interrupt on LAN8814"
* tag 'net-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (83 commits)
selftests: forwarding: add shebang for sch_red.sh
bnxt: prevent skb UAF after handing over to PTP worker
net: marvell: Fix refcounting bugs in prestera_port_sfp_bind()
net: sched: fix possible refcount leak in tc_new_tfilter()
net: sunhme: Fix packet reception for len < RX_COPY_THRESHOLD
udp: Use WARN_ON_ONCE() in udp_read_skb()
selftests: bonding: cause oops in bond_rr_gen_slave_id
bonding: fix NULL deref in bond_rr_gen_slave_id
net: phy: micrel: fix shared interrupt on LAN8814
net/smc: Stop the CLC flow if no link to map buffers on
ice: Fix ice_xdp_xmit() when XDP TX queue number is not sufficient
net: atlantic: fix potential memory leak in aq_ndev_close()
can: gs_usb: gs_usb_set_phys_id(): return with error if identify is not supported
can: gs_usb: gs_can_open(): fix race dev->can.state condition
can: flexcan: flexcan_mailbox_read() fix return value for drop = true
net: sh_eth: Fix PHY state warning splat during system resume
net: ravb: Fix PHY state warning splat during system resume
netfilter: nf_ct_ftp: fix deadlock when nat rewrite is needed
netfilter: ebtables: fix memory leak when blob is malformed
netfilter: nf_tables: fix percpu memory leak at nf_tables_addchain()
...
- Use the right variable to check for shim insecure mode
- Wipe setup_data field when booting via EFI
- Add missing error check to efibc driver
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Merge tag 'efi-urgent-for-v6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi
Pull EFI fixes from Ard Biesheuvel:
- Use the right variable to check for shim insecure mode
- Wipe setup_data field when booting via EFI
- Add missing error check to efibc driver
* tag 'efi-urgent-for-v6.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
efi: libstub: check Shim mode using MokSBStateRT
efi: x86: Wipe setup_data on pure EFI boot
efi: efibc: Guard against allocation failure
- fix a NULL-pointer dereference at driver unbind and a potential
resource leak in error path in gpio-mockup
- make the irqchip immutable in gpio-ftgpio010
- fix dereferencing a potentially uninitialized variable in gpio-tqmx86
- fix interrupt registering in gpiolib's character device code
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Merge tag 'gpio-fixes-for-v6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio fixes from Bartosz Golaszewski:
- fix a NULL-pointer dereference at driver unbind and a potential
resource leak in error path in gpio-mockup
- make the irqchip immutable in gpio-ftgpio010
- fix dereferencing a potentially uninitialized variable in gpio-tqmx86
- fix interrupt registering in gpiolib's character device code
* tag 'gpio-fixes-for-v6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
gpiolib: cdev: Set lineevent_state::irq after IRQ register successfully
gpio: tqmx86: fix uninitialized variable girq
gpio: ftgpio010: Make irqchip immutable
gpio: mockup: Fix potential resource leakage when register a chip
gpio: mockup: fix NULL pointer dereference when removing debugfs
- Fix polling of system-wide events related to mixing per-cpu and per-thread
events.
- Do not check if /proc/modules is unchanged when copying /proc/kcore,
that doesn't get in the way of post processing analysis.
- Include program header in ELF files generated for JIT files, so that they can
be opened by tools using elfutils libraries.
- Enter namespaces when synthesizing build-ids.
- Fix some bugs related to a recent cpu_map overhaul where we should be
using an index and not the cpu number.
- Fix BPF program ELF section name, using the naming expected by libbpf when
using BPF counters in 'perf stat'.
- Add a new test for perf stat cgroup BPF counter.
- Adjust check on 'perf test wp' for older kernels, where the
PERF_EVENT_IOC_MODIFY_ATTRIBUTES ioctl isn't supported.
- Sync x86 cpufeatures with the kernel sources, no changes in tooling.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-tools-fixes-for-v6.0-2022-09-21' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
Pull perf tools fixes from Arnaldo Carvalho de Melo:
- Fix polling of system-wide events related to mixing per-cpu and
per-thread events.
- Do not check if /proc/modules is unchanged when copying /proc/kcore,
that doesn't get in the way of post processing analysis.
- Include program header in ELF files generated for JIT files, so that
they can be opened by tools using elfutils libraries.
- Enter namespaces when synthesizing build-ids.
- Fix some bugs related to a recent cpu_map overhaul where we should be
using an index and not the cpu number.
- Fix BPF program ELF section name, using the naming expected by libbpf
when using BPF counters in 'perf stat'.
- Add a new test for perf stat cgroup BPF counter.
- Adjust check on 'perf test wp' for older kernels, where the
PERF_EVENT_IOC_MODIFY_ATTRIBUTES ioctl isn't supported.
- Sync x86 cpufeatures with the kernel sources, no changes in tooling.
* tag 'perf-tools-fixes-for-v6.0-2022-09-21' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
perf tools: Honor namespace when synthesizing build-ids
tools headers cpufeatures: Sync with the kernel sources
perf kcore_copy: Do not check /proc/modules is unchanged
libperf evlist: Fix polling of system-wide events
perf record: Fix cpu mask bit setting for mixed mmaps
perf test: Skip wp modify test on old kernels
perf jit: Include program header in ELF files
perf test: Add a new test for perf stat cgroup BPF counter
perf stat: Use evsel->core.cpus to iterate cpus in BPF cgroup counters
perf stat: Fix cpu map index in bperf cgroup code
perf stat: Fix BPF program section name
RHEL/Fedora RPM build checks are stricter, and complain when executable
files don't have a shebang line, e.g.
*** WARNING: ./kselftests/net/forwarding/sch_red.sh is executable but has no shebang, removing executable bit
Fix it by adding shebang line.
Fixes: 6cf0291f95 ("selftests: forwarding: Add a RED test for SW datapath")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/20220922024453.437757-1-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When reading the timestamp is required bnxt_tx_int() hands
over the ownership of the completed skb to the PTP worker.
The skb should not be used afterwards, as the worker may
run before the rest of our code and free the skb, leading
to a use-after-free.
Since dev_kfree_skb_any() accepts NULL make the loss of
ownership more obvious and set skb to NULL.
Fixes: 83bb623c96 ("bnxt_en: Transmit and retrieve packet timestamps")
Reviewed-by: Andy Gospodarek <gospo@broadcom.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20220921201005.335390-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
In prestera_port_sfp_bind(), there are two refcounting bugs:
(1) we should call of_node_get() before of_find_node_by_name() as
it will automaitcally decrease the refcount of 'from' argument;
(2) we should call of_node_put() for the break of the iteration
for_each_child_of_node() as it will automatically increase and
decrease the 'child'.
Fixes: 52323ef754 ("net: marvell: prestera: add phylink support")
Signed-off-by: Liang He <windhl@126.com>
Reviewed-by: Yevhen Orlov <yevhen.orlov@plvision.eu>
Link: https://lore.kernel.org/r/20220921133245.4111672-1-windhl@126.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
tfilter_put need to be called to put the refount got by tp->ops->get to
avoid possible refcount leak when chain->tmplt_ops != NULL and
chain->tmplt_ops != tp->ops.
Fixes: 7d5509fa0d ("net: sched: extend proto ops with 'put' callback")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Reviewed-by: Vlad Buslov <vladbu@nvidia.com>
Link: https://lore.kernel.org/r/20220921092734.31700-1-hbh25y@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
There is a separate receive path for small packets (under 256 bytes).
Instead of allocating a new dma-capable skb to be used for the next packet,
this path allocates a skb and copies the data into it (reusing the existing
sbk for the next packet). There are two bytes of junk data at the beginning
of every packet. I believe these are inserted in order to allow aligned DMA
and IP headers. We skip over them using skb_reserve. Before copying over
the data, we must use a barrier to ensure we see the whole packet. The
current code only synchronizes len bytes, starting from the beginning of
the packet, including the junk bytes. However, this leaves off the final
two bytes in the packet. Synchronize the whole packet.
To reproduce this problem, ping a HME with a payload size between 17 and
214
$ ping -s 17 <hme_address>
which will complain rather loudly about the data mismatch. Small packets
(below 60 bytes on the wire) do not have this issue. I suspect this is
related to the padding added to increase the minimum packet size.
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220920235018.1675956-1-seanga2@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Here are some new modem device ids.
All have been in linux-next with no reported issues.
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Merge tag 'usb-serial-6.0-rc7' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus
Johan writes:
"USB-serial fixes for 6.0-rc7
Here are some new modem device ids.
All have been in linux-next with no reported issues."
* tag 'usb-serial-6.0-rc7' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial:
USB: serial: option: add Quectel RM520N
USB: serial: option: add Quectel BG95 0x0203 composition
