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Customers using GKE 1.25 and 1.26 are facing conntrack issues
root caused to commit c9c3b6811f74 ("netfilter: conntrack: make
max chain length random").
Even if we assume Uniform Hashing, a bucket often reachs 8 chained
items while the load factor of the hash table is smaller than 0.5
With a limit of 16, we reach load factors of 3.
With a limit of 32, we reach load factors of 11.
With a limit of 40, we reach load factors of 15.
With a limit of 50, we reach load factors of 24.
This patch changes MIN_CHAINLEN to 50, to minimize risks.
Ideally, we could in the future add a cushion based on expected
load factor (2 * nf_conntrack_max / nf_conntrack_buckets),
because some setups might expect unusual values.
Fixes: c9c3b6811f74 ("netfilter: conntrack: make max chain length random")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:
====================
pull-request: bpf 2023-03-06
We've added 8 non-merge commits during the last 7 day(s) which contain
a total of 9 files changed, 64 insertions(+), 18 deletions(-).
The main changes are:
1) Fix BTF resolver for DATASEC sections when a VAR points at a modifier,
that is, keep resolving such instances instead of bailing out,
from Lorenz Bauer.
2) Fix BPF test framework with regards to xdp_frame info misplacement
in the "live packet" code, from Alexander Lobakin.
3) Fix an infinite loop in BPF sockmap code for TCP/UDP/AF_UNIX,
from Liu Jian.
4) Fix a build error for riscv BPF JIT under PERF_EVENTS=n,
from Randy Dunlap.
5) Several BPF doc fixes with either broken links or external instead
of internal doc links, from Bagas Sanjaya.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
selftests/bpf: check that modifier resolves after pointer
btf: fix resolving BTF_KIND_VAR after ARRAY, STRUCT, UNION, PTR
bpf, test_run: fix &xdp_frame misplacement for LIVE_FRAMES
bpf, doc: Link to submitting-patches.rst for general patch submission info
bpf, doc: Do not link to docs.kernel.org for kselftest link
bpf, sockmap: Fix an infinite loop error when len is 0 in tcp_bpf_recvmsg_parser()
riscv, bpf: Fix patch_text implicit declaration
bpf, docs: Fix link to BTF doc
====================
Link: https://lore.kernel.org/r/20230306215944.11981-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Adrien reports that incorrect data is transmitted when a single
page straddles multiple records. We would transmit the same
data in all iterations of the loop.
Reported-by: Adrien Moulin <amoulin@corp.free.fr>
Link: https://lore.kernel.org/all/61481278.42813558.1677845235112.JavaMail.zimbra@corp.free.fr
Fixes: c1318b39c7d3 ("tls: Add opt-in zerocopy mode of sendfile()")
Tested-by: Adrien Moulin <amoulin@corp.free.fr>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Acked-by: Maxim Mikityanskiy <maxtram95@gmail.com>
Link: https://lore.kernel.org/r/20230304192610.3818098-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Fix data corruption issue with SerDes connected PHYs operating at 1.25
Gbps speed where we could previously observe about 30% packet loss while
the bad packet counter was increasing.
As almost all boards with MediaTek MT7622 or MT7986 use either the MT7531
switch IC operating at 3.125Gbps SerDes rate or single-port PHYs using
rate-adaptation to 2500Base-X mode, this issue only got exposed now when
we started trying to use SFP modules operating with 1.25 Gbps with the
BananaPi R3 board.
The fix is to set bit 12 which disables the RX FIFO clear function when
setting up MAC MCR, MediaTek SDK did the same change stating:
"If without this patch, kernel might receive invalid packets that are
corrupted by GMAC."[1]
[1]: d8a2975939
Fixes: 42c03844e93d ("net-next: mediatek: add support for MediaTek MT7622 SoC")
Tested-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/138da2735f92c8b6f8578ec2e5a794ee515b665f.1677937317.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently link up can't be detected in forced mode if polling
isn't used. Only link up interrupt source we have is aneg
complete which isn't applicable in forced mode. Therefore we
have to use energy-on as link up indicator.
Fixes: 7365494550f6 ("net: phy: smsc: skip ENERGYON interrupt if disabled")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
It turns out that commit 596ff4a09b89 ("cpumask: re-introduce
constant-sized cpumask optimizations") exposed a number of cases of
drivers not checking the result of "cpumask_next()" and friends
correctly.
The documented correct check for "no more cpus in the cpumask" is to
check for the result being equal or larger than the number of possible
CPU ids, exactly _because_ we've always done those constant-sized
cpumask scans using a widened type before. So the return value of a
cpumask scan should be checked with
if (cpu >= nr_cpu_ids)
...
because the cpumask scan did not necessarily stop exactly *at* that
maximum CPU id.
But a few cases ended up instead using checks like
if (cpu == nr_cpumask_bits)
...
which used that internal "widened" number of bits. And that used to
work pretty much by accident (ok, in this case "by accident" is simply
because it matched the historical internal implementation of the cpumask
scanning, so it was more of a "intentionally using implementation
details rather than an accident").
But the extended constant-sized optimizations then did that internal
implementation differently, and now that code that did things wrong but
matched the old implementation no longer worked at all.
Which then causes subsequent odd problems due to using what ends up
being an invalid CPU ID.
Most of these cases require either unusual hardware or special uses to
hit, but the random.c one triggers quite easily.
All you really need is to have a sufficiently small CONFIG_NR_CPUS value
for the bit scanning optimization to be triggered, but not enough CPUs
to then actually fill that widened cpumask. At that point, the cpumask
scanning will return the NR_CPUS constant, which is _not_ the same as
nr_cpumask_bits.
This just does the mindless fix with
sed -i 's/== nr_cpumask_bits/>= nr_cpu_ids/'
to fix the incorrect uses.
The ones in the SCSI lpfc driver in particular could probably be fixed
more cleanly by just removing that repeated pattern entirely, but I am
not emptionally invested enough in that driver to care.
Reported-and-tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/lkml/481b19b5-83a0-4793-b4fd-194ad7b978c3@roeck-us.net/
Reported-and-tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/lkml/CAMuHMdUKo_Sf7TjKzcNDa8Ve+6QrK+P8nSQrSQ=6LTRmcBKNww@mail.gmail.com/
Reported-by: Vernon Yang <vernon2gm@gmail.com>
Link: https://lore.kernel.org/lkml/20230306160651.2016767-1-vernon2gm@gmail.com/
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Lorenz Bauer says:
====================
See the first patch for a detailed explanation.
v2:
- Move RESOLVE_TBD assignment out of the loop (Martin)
====================
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Add a regression test that ensures that a VAR pointing at a
modifier which follows a PTR (or STRUCT or ARRAY) is resolved
correctly by the datasec validator.
Signed-off-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/r/20230306112138.155352-3-lmb@isovalent.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
btf_datasec_resolve contains a bug that causes the following BTF
to fail loading:
[1] DATASEC a size=2 vlen=2
type_id=4 offset=0 size=1
type_id=7 offset=1 size=1
[2] INT (anon) size=1 bits_offset=0 nr_bits=8 encoding=(none)
[3] PTR (anon) type_id=2
[4] VAR a type_id=3 linkage=0
[5] INT (anon) size=1 bits_offset=0 nr_bits=8 encoding=(none)
[6] TYPEDEF td type_id=5
[7] VAR b type_id=6 linkage=0
This error message is printed during btf_check_all_types:
[1] DATASEC a size=2 vlen=2
type_id=7 offset=1 size=1 Invalid type
By tracing btf_*_resolve we can pinpoint the problem:
btf_datasec_resolve(depth: 1, type_id: 1, mode: RESOLVE_TBD) = 0
btf_var_resolve(depth: 2, type_id: 4, mode: RESOLVE_TBD) = 0
btf_ptr_resolve(depth: 3, type_id: 3, mode: RESOLVE_PTR) = 0
btf_var_resolve(depth: 2, type_id: 4, mode: RESOLVE_PTR) = 0
btf_datasec_resolve(depth: 1, type_id: 1, mode: RESOLVE_PTR) = -22
The last invocation of btf_datasec_resolve should invoke btf_var_resolve
by means of env_stack_push, instead it returns EINVAL. The reason is that
env_stack_push is never executed for the second VAR.
if (!env_type_is_resolve_sink(env, var_type) &&
!env_type_is_resolved(env, var_type_id)) {
env_stack_set_next_member(env, i + 1);
return env_stack_push(env, var_type, var_type_id);
}
env_type_is_resolve_sink() changes its behaviour based on resolve_mode.
For RESOLVE_PTR, we can simplify the if condition to the following:
(btf_type_is_modifier() || btf_type_is_ptr) && !env_type_is_resolved()
Since we're dealing with a VAR the clause evaluates to false. This is
not sufficient to trigger the bug however. The log output and EINVAL
are only generated if btf_type_id_size() fails.
if (!btf_type_id_size(btf, &type_id, &type_size)) {
btf_verifier_log_vsi(env, v->t, vsi, "Invalid type");
return -EINVAL;
}
Most types are sized, so for example a VAR referring to an INT is not a
problem. The bug is only triggered if a VAR points at a modifier. Since
we skipped btf_var_resolve that modifier was also never resolved, which
means that btf_resolved_type_id returns 0 aka VOID for the modifier.
This in turn causes btf_type_id_size to return NULL, triggering EINVAL.
To summarise, the following conditions are necessary:
- VAR pointing at PTR, STRUCT, UNION or ARRAY
- Followed by a VAR pointing at TYPEDEF, VOLATILE, CONST, RESTRICT or
TYPE_TAG
The fix is to reset resolve_mode to RESOLVE_TBD before attempting to
resolve a VAR from a DATASEC.
Fixes: 1dc92851849c ("bpf: kernel side support for BTF Var and DataSec")
Signed-off-by: Lorenz Bauer <lmb@isovalent.com>
Link: https://lore.kernel.org/r/20230306112138.155352-2-lmb@isovalent.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
&xdp_buff and &xdp_frame are bound in a way that
xdp_buff->data_hard_start == xdp_frame
It's always the case and e.g. xdp_convert_buff_to_frame() relies on
this.
IOW, the following:
for (u32 i = 0; i < 0xdead; i++) {
xdpf = xdp_convert_buff_to_frame(&xdp);
xdp_convert_frame_to_buff(xdpf, &xdp);
}
shouldn't ever modify @xdpf's contents or the pointer itself.
However, "live packet" code wrongly treats &xdp_frame as part of its
context placed *before* the data_hard_start. With such flow,
data_hard_start is sizeof(*xdpf) off to the right and no longer points
to the XDP frame.
Instead of replacing `sizeof(ctx)` with `offsetof(ctx, xdpf)` in several
places and praying that there are no more miscalcs left somewhere in the
code, unionize ::frm with ::data in a flex array, so that both starts
pointing to the actual data_hard_start and the XDP frame actually starts
being a part of it, i.e. a part of the headroom, not the context.
A nice side effect is that the maximum frame size for this mode gets
increased by 40 bytes, as xdp_buff::frame_sz includes everything from
data_hard_start (-> includes xdpf already) to the end of XDP/skb shared
info.
Also update %MAX_PKT_SIZE accordingly in the selftests code. Leave it
hardcoded for 64 bit && 4k pages, it can be made more flexible later on.
Minor: align `&head->data` with how `head->frm` is assigned for
consistency.
Minor #2: rename 'frm' to 'frame' in &xdp_page_head while at it for
clarity.
(was found while testing XDP traffic generator on ice, which calls
xdp_convert_frame_to_buff() for each XDP frame)
Fixes: b530e9e1063e ("bpf: Add "live packet" mode for XDP in BPF_PROG_RUN")
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://lore.kernel.org/r/20230224163607.2994755-1-aleksander.lobakin@intel.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
The never used nr_cpumask_size is just a typo, hence use existing
redefinition that's called nr_cpumask_bits.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The link for patch submission information in general refers to index
page for "Working with the kernel development community" section of
kernel docs, whereas the link should have been
Documentation/process/submitting-patches.rst instead.
Fix it by replacing the index target with the appropriate doc.
Fixes: 542228384888f5 ("bpf, doc: convert bpf_devel_QA.rst to use RST formatting")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230228074523.11493-3-bagasdotme@gmail.com
The question on how to run BPF selftests have a reference link to kernel
selftest documentation (Documentation/dev-tools/kselftest.rst). However,
it uses external link to the documentation at kernel.org/docs (aka
docs.kernel.org) instead, which requires Internet access.
Fix this and replace the link with internal linking, by using :doc: directive
while keeping the anchor text.
Fixes: b7a27c3aafa252 ("bpf, doc: howto use/run the BPF selftests")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230228074523.11493-2-bagasdotme@gmail.com
Now that address space operations are merge dfor in-ICB and normal
files, it is more likely some code mistakenly tries to map blocks for
in-ICB files. WARN and return error instead of silently returning
garbage.
Signed-off-by: Jan Kara <jack@suse.cz>
After merging address space operations of normal and in-ICB files,
readahead could get called for in-ICB files which resulted in
udf_get_block() being called for these files. udf_get_block() is not
prepared to be called for in-ICB files and ends up returning garbage
results as it interprets file data as extent list. Fix the problem by
skipping readahead for in-ICB files.
Fixes: 37a8a39f7ad3 ("udf: Switch to single address_space_operations")
Signed-off-by: Jan Kara <jack@suse.cz>
The patch converting udf_adinicb_writepage() to avoid manually kmapping
the page used memcpy_to_page() however that copies in the wrong
direction (effectively overwriting file data with the old contents).
What we should be using is memcpy_from_page() to copy data from the page
into the inode and then mark inode dirty to store the data.
Fixes: 5cfc45321a6d ("udf: Convert udf_adinicb_writepage() to memcpy_to_page()")
Signed-off-by: Jan Kara <jack@suse.cz>
__get_kernel_nofault() does copy data in supervisor mode when
forcing a task backtrace log through /proc/sysrq_trigger.
This is expected cause a bus error exception on e.g. NULL
pointer dereferencing when logging a kernel task has no
workqueue associated. This bus error ought to be ignored.
Our 030 bus error handler is ill equipped to deal with this:
Whenever ssw indicates a kernel mode access on a data fault,
we don't even attempt to handle the fault and instead always
send a SEGV signal (or panic). As a result, the check
for exception handling at the fault PC (buried in
send_sig_fault() which gets called from do_page_fault()
eventually) is never used.
In contrast, both 040 and 060 access error handlers do not
care whether a fault happened on supervisor mode access,
and will call do_page_fault() on those, ultimately honoring
the exception table.
Add a check in bus_error030 to call do_page_fault() in case
we do have an entry for the fault PC in our exception table.
I had attempted a fix for this earlier in 2019 that did rely
on testing pagefault_disabled() (see link below) to achieve
the same thing, but this patch should be more generic.
Tested on 030 Atari Falcon.
Reported-by: Eero Tamminen <oak@helsinkinet.fi>
Link: https://lore.kernel.org/r/alpine.LNX.2.21.1904091023540.25@nippy.intranet
Link: https://lore.kernel.org/r/63130691-1984-c423-c1f2-73bfd8d3dcd3@gmail.com
Signed-off-by: Michael Schmitz <schmitzmic@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20230301021107.26307-1-schmitzmic@gmail.com
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
When booting with an initial ramdisk on platforms where physical memory
does not start at address zero (e.g. on Amiga):
initrd: 0ef0602c - 0f800000
Zone ranges:
DMA [mem 0x0000000008000000-0x000000f7ffffffff]
Normal empty
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000008000000-0x000000000f7fffff]
Initmem setup node 0 [mem 0x0000000008000000-0x000000000f7fffff]
Unable to handle kernel access at virtual address (ptrval)
Oops: 00000000
Modules linked in:
PC: [<00201d3c>] memcmp+0x28/0x56
As phys_to_virt() relies on m68k_memoffset and module_fixup(), it must
not be called before paging_init(). Hence postpone the phys_to_virt
handling for the initial ramdisk until after calling paging_init().
While at it, reduce #ifdef clutter by using IS_ENABLED() instead.
Fixes: 376e3fdecb0dcae2 ("m68k: Enable memtest functionality")
Reported-by: Stephen Walsh <vk3heg@vk3heg.net>
Link: https://lists.debian.org/debian-68k/2022/09/msg00007.html
Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/4f45f05f377bf3f5baf88dbd5c3c8aeac59d94f0.camel@physik.fu-berlin.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Finn Thain <fthain@linux-m68k.org>
Link: https://lore.kernel.org/r/dff216da09ab7a60217c3fc2147e671ae07d636f.1677528627.git.geert@linux-m68k.org
The xtables packet traverser performs an unconditional local_bh_disable(),
but the nf_tables evaluation loop does not.
Functions that are called from either xtables or nftables must assume
that they can be called in process context.
inet_twsk_deschedule_put() assumes that no softirq interrupt can occur.
If tproxy is used from nf_tables its possible that we'll deadlock
trying to aquire a lock already held in process context.
Add a small helper that takes care of this and use it.
Link: https://lore.kernel.org/netfilter-devel/401bd6ed-314a-a196-1cdc-e13c720cc8f2@balasys.hu/
Fixes: 4ed8eb6570a4 ("netfilter: nf_tables: Add native tproxy support")
Reported-and-tested-by: Major Dávid <major.david@balasys.hu>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
It seems that change was unintentional, we have userspace code that
needs the mark while listening for events like REPLY, DESTROY, etc.
Also include 0-marks in requested dumps, as they were before that fix.
Fixes: 1feeae071507 ("netfilter: ctnetlink: fix compilation warning after data race fixes in ct mark")
Signed-off-by: Ivan Delalande <colona@arista.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
The driver needs to keep track of all the possible concurrent TPA (GRO/LRO)
completions on the aggregation ring. On P5 chips, the maximum number
of concurrent TPA is 256 and the amount of memory we allocate is order-5
on systems using 4K pages. Memory allocation failure has been reported:
NetworkManager: page allocation failure: order:5, mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null),cpuset=/,mems_allowed=0-1
CPU: 15 PID: 2995 Comm: NetworkManager Kdump: loaded Not tainted 5.10.156 #1
Hardware name: Dell Inc. PowerEdge R660/0M1CC5, BIOS 0.2.25 08/12/2022
Call Trace:
dump_stack+0x57/0x6e
warn_alloc.cold.120+0x7b/0xdd
? _cond_resched+0x15/0x30
? __alloc_pages_direct_compact+0x15f/0x170
__alloc_pages_slowpath.constprop.108+0xc58/0xc70
__alloc_pages_nodemask+0x2d0/0x300
kmalloc_order+0x24/0xe0
kmalloc_order_trace+0x19/0x80
bnxt_alloc_mem+0x1150/0x15c0 [bnxt_en]
? bnxt_get_func_stat_ctxs+0x13/0x60 [bnxt_en]
__bnxt_open_nic+0x12e/0x780 [bnxt_en]
bnxt_open+0x10b/0x240 [bnxt_en]
__dev_open+0xe9/0x180
__dev_change_flags+0x1af/0x220
dev_change_flags+0x21/0x60
do_setlink+0x35c/0x1100
Instead of allocating this big chunk of memory and dividing it up for the
concurrent TPA instances, allocate each small chunk separately for each
TPA instance. This will reduce it to order-0 allocations.
Fixes: 79632e9ba386 ("bnxt_en: Expand bnxt_tpa_info struct to support 57500 chips.")
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When MAC is not support PMT, driver will check PHY's WoL capability
and set device wakeup capability in stmmac_init_phy(). We can enable
the WoL through ethtool, the driver would enable the device wake up
flag. Now the device_may_wakeup() return true.
But if there is a way which enable the PHY's WoL capability derectly,
like in BIOS. The driver would not know the enable thing and would not
set the device wake up flag. The phy_suspend may failed like this:
[ 32.409063] PM: dpm_run_callback(): mdio_bus_phy_suspend+0x0/0x50 returns -16
[ 32.409065] PM: Device stmmac-1:00 failed to suspend: error -16
[ 32.409067] PM: Some devices failed to suspend, or early wake event detected
Add to set the device wakeup enable flag according to the get_wol
function result in PHY can fix the error in this scene.
v2: add a Fixes tag.
Fixes: 1d8e5b0f3f2c ("net: stmmac: Support WOL with phy")
Signed-off-by: Rongguang Wei <weirongguang@kylinos.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit aa47a7c215e7 ("lib/cpumask: deprecate nr_cpumask_bits") resulted
in the cpumask operations potentially becoming hugely less efficient,
because suddenly the cpumask was always considered to be variable-sized.
The optimization was then later added back in a limited form by commit
6f9c07be9d02 ("lib/cpumask: add FORCE_NR_CPUS config option"), but that
FORCE_NR_CPUS option is not useful in a generic kernel and more of a
special case for embedded situations with fixed hardware.
Instead, just re-introduce the optimization, with some changes.
Instead of depending on CPUMASK_OFFSTACK being false, and then always
using the full constant cpumask width, this introduces three different
cpumask "sizes":
- the exact size (nr_cpumask_bits) remains identical to nr_cpu_ids.
This is used for situations where we should use the exact size.
- the "small" size (small_cpumask_bits) is the NR_CPUS constant if it
fits in a single word and the bitmap operations thus end up able
to trigger the "small_const_nbits()" optimizations.
This is used for the operations that have optimized single-word
cases that get inlined, notably the bit find and scanning functions.
- the "large" size (large_cpumask_bits) is the NR_CPUS constant if it
is an sufficiently small constant that makes simple "copy" and
"clear" operations more efficient.
This is arbitrarily set at four words or less.
As a an example of this situation, without this fixed size optimization,
cpumask_clear() will generate code like
movl nr_cpu_ids(%rip), %edx
addq $63, %rdx
shrq $3, %rdx
andl $-8, %edx
callq memset@PLT
on x86-64, because it would calculate the "exact" number of longwords
that need to be cleared.
In contrast, with this patch, using a MAX_CPU of 64 (which is quite a
reasonable value to use), the above becomes a single
movq $0,cpumask
instruction instead, because instead of caring to figure out exactly how
many CPU's the system has, it just knows that the cpumask will be a
single word and can just clear it all.
Note that this does end up tightening the rules a bit from the original
version in another way: operations that set bits in the cpumask are now
limited to the actual nr_cpu_ids limit, whereas we used to do the
nr_cpumask_bits thing almost everywhere in the cpumask code.
But if you just clear bits, or scan for bits, we can use the simpler
compile-time constants.
In the process, remove 'cpumask_complement()' and 'for_each_cpu_not()'
which were not useful, and which fundamentally have to be limited to
'nr_cpu_ids'. Better remove them now than have somebody introduce use
of them later.
Of course, on x86-64 with MAXSMP there is no sane small compile-time
constant for the cpumask sizes, and we end up using the actual CPU bits,
and will generate the above kind of horrors regardless. Please don't
use MAXSMP unless you really expect to have machines with thousands of
cores.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Return -EIO instead of success when the certificate buffer for SEV
guests is not large enough.
- Allow STIPB to be enabled with legacy IBSR. Legacy IBRS is cleared on
return to userspace for performance reasons, but the leaves user space
vulnerable to cross-thread attacks which STIBP prevents. Update the
documentation accordingly.
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Merge tag 'x86-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 updates from Thomas Gleixner:
"A small set of updates for x86:
- Return -EIO instead of success when the certificate buffer for SEV
guests is not large enough
- Allow STIPB to be enabled with legacy IBSR. Legacy IBRS is cleared
on return to userspace for performance reasons, but the leaves user
space vulnerable to cross-thread attacks which STIBP prevents.
Update the documentation accordingly"
* tag 'x86-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
virt/sev-guest: Return -EIO if certificate buffer is not large enough
Documentation/hw-vuln: Document the interaction between IBRS and STIBP
x86/speculation: Allow enabling STIBP with legacy IBRS
- Prevent possible NULL pointer derefences in irq_data_get_affinity_mask()
and irq_domain_create_hierarchy().
- Take the per device MSI lock before invoking code which relies
on it being hold.
- Make sure that MSI descriptors are unreferenced before freeing
them. This was overlooked when the platform MSI code was converted to
use core infrastructure and results in a fals positive warning.
- Remove dead code in the MSI subsystem.
- Clarify the documentation for pci_msix_free_irq().
- More kobj_type constification.
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Merge tag 'irq-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq updates from Thomas Gleixner:
"A set of updates for the interrupt susbsystem:
- Prevent possible NULL pointer derefences in
irq_data_get_affinity_mask() and irq_domain_create_hierarchy()
- Take the per device MSI lock before invoking code which relies on
it being hold
- Make sure that MSI descriptors are unreferenced before freeing
them. This was overlooked when the platform MSI code was converted
to use core infrastructure and results in a fals positive warning
- Remove dead code in the MSI subsystem
- Clarify the documentation for pci_msix_free_irq()
- More kobj_type constification"
* tag 'irq-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq/msi, platform-msi: Ensure that MSI descriptors are unreferenced
genirq/msi: Drop dead domain name assignment
irqdomain: Add missing NULL pointer check in irq_domain_create_hierarchy()
genirq/irqdesc: Make kobj_type structures constant
PCI/MSI: Clarify usage of pci_msix_free_irq()
genirq/msi: Take the per-device MSI lock before validating the control structure
genirq/ipi: Fix NULL pointer deref in irq_data_get_affinity_mask()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs update from Al Viro:
"Adding Christian Brauner as VFS co-maintainer"
* tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
Adding VFS co-maintainer
Some of the page fault handlers do not deal with the following case
correctly:
* handle_mm_fault() has returned VM_FAULT_RETRY
* there is a pending fatal signal
* fault had happened in kernel mode
Correct action in such case is not "return unconditionally" - fatal
signals are handled only upon return to userland and something like
copy_to_user() would end up retrying the faulting instruction and
triggering the same fault again and again.
What we need to do in such case is to make the caller to treat that
as failed uaccess attempt - handle exception if there is an exception
handler for faulting instruction or oops if there isn't one.
Over the years some architectures had been fixed and now are handling
that case properly; some still do not. This series should fix the
remaining ones.
Status:
m68k, riscv, hexagon, parisc: tested/acked by maintainers.
alpha, sparc32, sparc64: tested locally - bug has been
reproduced on the unpatched kernel and verified to be fixed by
this series.
ia64, microblaze, nios2, openrisc: build, but otherwise
completely untested.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull VM_FAULT_RETRY fixes from Al Viro:
"Some of the page fault handlers do not deal with the following case
correctly:
- handle_mm_fault() has returned VM_FAULT_RETRY
- there is a pending fatal signal
- fault had happened in kernel mode
Correct action in such case is not "return unconditionally" - fatal
signals are handled only upon return to userland and something like
copy_to_user() would end up retrying the faulting instruction and
triggering the same fault again and again.
What we need to do in such case is to make the caller to treat that as
failed uaccess attempt - handle exception if there is an exception
handler for faulting instruction or oops if there isn't one.
Over the years some architectures had been fixed and now are handling
that case properly; some still do not. This series should fix the
remaining ones.
Status:
- m68k, riscv, hexagon, parisc: tested/acked by maintainers.
- alpha, sparc32, sparc64: tested locally - bug has been reproduced
on the unpatched kernel and verified to be fixed by this series.
- ia64, microblaze, nios2, openrisc: build, but otherwise completely
untested"
* tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
openrisc: fix livelock in uaccess
nios2: fix livelock in uaccess
microblaze: fix livelock in uaccess
ia64: fix livelock in uaccess
sparc: fix livelock in uaccess
alpha: fix livelock in uaccess
parisc: fix livelock in uaccess
hexagon: fix livelock in uaccess
riscv: fix livelock in uaccess
m68k: fix livelock in uaccess
include/linux/compiler-intel.h had no update in the past 3 years.
We often forget about the third C compiler to build the kernel.
For example, commit a0a12c3ed057 ("asm goto: eradicate CC_HAS_ASM_GOTO")
only mentioned GCC and Clang.
init/Kconfig defines CC_IS_GCC and CC_IS_CLANG but not CC_IS_ICC,
and nobody has reported any issue.
I guess the Intel Compiler support is broken, and nobody is caring
about it.
Harald Arnesen pointed out ICC (classic Intel C/C++ compiler) is
deprecated:
$ icc -v
icc: remark #10441: The Intel(R) C++ Compiler Classic (ICC) is
deprecated and will be removed from product release in the second half
of 2023. The Intel(R) oneAPI DPC++/C++ Compiler (ICX) is the recommended
compiler moving forward. Please transition to use this compiler. Use
'-diag-disable=10441' to disable this message.
icc version 2021.7.0 (gcc version 12.1.0 compatibility)
Arnd Bergmann provided a link to the article, "Intel C/C++ compilers
complete adoption of LLVM".
lib/zstd/common/compiler.h and lib/zstd/compress/zstd_fast.c were kept
untouched for better sync with https://github.com/facebook/zstd
Link: https://www.intel.com/content/www/us/en/developer/articles/technical/adoption-of-llvm-complete-icx.html
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The migration code ends up temporarily stashing information of the wrong
type in unused fields of the newly allocated destination folio. That
all works fine, but gcc does complain about the pointer type mis-use:
mm/migrate.c: In function ‘__migrate_folio_extract’:
mm/migrate.c:1050:20: note: randstruct: casting between randomized structure pointer types (ssa): ‘struct anon_vma’ and ‘struct address_space’
1050 | *anon_vmap = (void *)dst->mapping;
| ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
and gcc is actually right to complain since it really doesn't understand
that this is a very temporary special case where this is ok.
This could be fixed in different ways by just obfuscating the assignment
sufficiently that gcc doesn't see what is going on, but the truly
"proper C" way to do this is by explicitly using a union.
Using unions for type conversions like this is normally hugely ugly and
syntactically nasty, but this really is one of the few cases where we
want to make it clear that we're not doing type conversion, we're really
re-using the value bit-for-bit just using another type.
IOW, this should not become a common pattern, but in this one case using
that odd union is probably the best way to document to the compiler what
is conceptually going on here.
[ Side note: there are valid cases where we convert pointers to other
pointer types, notably the whole "folio vs page" situation, where the
types actually have fundamental commonalities.
The fact that the gcc note is limited to just randomized structures
means that we don't see equivalent warnings for those cases, but it
migth also mean that we miss other cases where we do play these kinds
of dodgy games, and this kind of explicit conversion might be a good
idea. ]
I verified that at least for an allmodconfig build on x86-64, this
generates the exact same code, apart from line numbers and assembler
comment changes.
Fixes: 64c8902ed441 ("migrate_pages: split unmap_and_move() to _unmap() and _move()")
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel. Seven are cc:stable and eight address post-6.3 issues or were
judged unsuitable for -stable backporting.
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Merge tag 'mm-hotfixes-stable-2023-03-04-13-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"17 hotfixes.
Eight are for MM and seven are for other parts of the kernel. Seven
are cc:stable and eight address post-6.3 issues or were judged
unsuitable for -stable backporting"
* tag 'mm-hotfixes-stable-2023-03-04-13-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
mailmap: map Dikshita Agarwal's old address to his current one
mailmap: map Vikash Garodia's old address to his current one
fs/cramfs/inode.c: initialize file_ra_state
fs: hfsplus: fix UAF issue in hfsplus_put_super
panic: fix the panic_print NMI backtrace setting
lib: parser: update documentation for match_NUMBER functions
kasan, x86: don't rename memintrinsics in uninstrumented files
kasan: test: fix test for new meminstrinsic instrumentation
kasan: treat meminstrinsic as builtins in uninstrumented files
kasan: emit different calls for instrumentable memintrinsics
ocfs2: fix non-auto defrag path not working issue
ocfs2: fix defrag path triggering jbd2 ASSERT
mailmap: map Georgi Djakov's old Linaro address to his current one
mm/hwpoison: convert TTU_IGNORE_HWPOISON to TTU_HWPOISON
lib/zlib: DFLTCC deflate does not write all available bits for Z_NO_FLUSH
mm/damon/paddr: fix missing folio_put()
mm/mremap: fix dup_anon_vma() in vma_merge() case 4
- Drop orphaned VAS MAINTAINERS entry.
- Fix build errors with clang and KCSAN.
- Avoid build errors seen with LD_DEAD_CODE_DATA_ELIMINATION & recordmcount.
Thanks to: Nathan Chancellor
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Merge tag 'powerpc-6.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Drop orphaned VAS MAINTAINERS entry
- Fix build errors with clang and KCSAN
- Avoid build errors seen with LD_DEAD_CODE_DATA_ELIMINATION together
with recordmcount
Thanks to Nathan Chancellor.
* tag 'powerpc-6.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc: Avoid dead code/data elimination when using recordmcount
powerpc/vmlinux.lds: Add .text.asan/tsan sections
powerpc: Drop orphaned VAS MAINTAINERS entry
A collection of various small fixes that have been gathered since
the last PR. The majority of changes are for ASoC, and there is
a small change in ASoC PCM core, but the rest are all for driver-
specific fixes / quirks / updates.
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Merge tag 'sound-fix-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of various small fixes that have been gathered since the
last PR.
The majority of changes are for ASoC, and there is a small change in
ASoC PCM core, but the rest are all for driver- specific fixes /
quirks / updates"
* tag 'sound-fix-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (32 commits)
ALSA: ice1712: Delete unreachable code in aureon_add_controls()
ALSA: ice1712: Do not left ice->gpio_mutex locked in aureon_add_controls()
ALSA: hda/realtek: Add quirk for HP EliteDesk 800 G6 Tower PC
ALSA: hda/realtek: Improve support for Dell Precision 3260
ASoC: mediatek: mt8195: add missing initialization
ASoC: mediatek: mt8188: add missing initialization
ASoC: amd: yc: Add DMI entries to support HP OMEN 16-n0xxx (8A43)
ASoC: zl38060 add gpiolib dependency
ASoC: sam9g20ek: Disable capture unless building with microphone input
ASoC: mt8192: Fix range for sidetone positive gain
ASoC: mt8192: Report an error if when an invalid sidetone gain is written
ASoC: mt8192: Fix event generation for controls
ASoC: mt8192: Remove spammy log messages
ASoC: mchp-pdmc: fix poc noise at capture startup
ASoC: dt-bindings: sama7g5-pdmc: add microchip,startup-delay-us binding
ASoC: soc-pcm: add option to start DMA after DAI
ASoC: mt8183: Fix event generation for I2S DAI operations
ASoC: mt8183: Remove spammy logging from I2S DAI driver
ASoC: mt6358: Remove undefined HPx Mux enumeration values
ASoC: mt6358: Validate Wake on Voice 2 writes
...
- Fix DT binding for Richtek RT9467
- Fix a NULL pointer check in the power-supply core
- Document meaning of absent "present" property
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Merge tag 'for-v6.3-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
Pull more power supply updates from Sebastian Reichel:
- Fix DT binding for Richtek RT9467
- Fix a NULL pointer check in the power-supply core
- Document meaning of absent "present" property
* tag 'for-v6.3-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
dt-bindings: power: supply: Revise Richtek RT9467 compatible name
ABI: testing: sysfs-class-power: Document absence of "present" property
power: supply: fix null pointer check order in __power_supply_register
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Merge tag '6.3-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
Pull more cifs updates from Steve French:
- xfstest generic/208 fix (memory leak)
- minor netfs fix (to address smatch warning)
- a DFS fix for stable
- a reconnect race fix
- two multichannel fixes
- RDMA (smbdirect) fix
- two additional writeback fixes from David
* tag '6.3-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
cifs: Fix memory leak in direct I/O
cifs: prevent data race in cifs_reconnect_tcon()
cifs: improve checking of DFS links over STATUS_OBJECT_NAME_INVALID
iov: Fix netfs_extract_user_to_sg()
cifs: Fix cifs_write_back_from_locked_folio()
cifs: reuse cifs_match_ipaddr for comparison of dstaddr too
cifs: match even the scope id for ipv6 addresses
cifs: Fix an uninitialised variable
cifs: Add some missing xas_retry() calls
The usermodehelper code uses two fake pointers for the two capability
cases: CAP_BSET for reading and writing 'usermodehelper_bset', and
CAP_PI to read and write 'usermodehelper_inheritable'.
This seems to be a completely unnecessary indirection, since we could
instead just use the pointers themselves, and never have to do any "if
this then that" kind of logic.
So just get rid of the fake pointer values, and use the real pointer
values instead.
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: Iurii Zaikin <yzaikin@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This branch makes a couple of changes in make coccicheck related to
shell commands.
It also updates the api/atomic_as_refcounter semantic patch to include
WARNING in the output message, as done in other cases.
Signed-off-by: Julia Lawall <julia.lawall@inria.fr>
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Merge tag 'cocci-for-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux
Pull coccinelle updates from Julia Lawall:
"Changes in make coccicheck and improve a semantic patch
This makes a couple of changes in make coccicheck related to shell
commands.
It also updates the api/atomic_as_refcounter semantic patch to include
WARNING in the output message, as done in other cases"
* tag 'cocci-for-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux:
scripts: coccicheck: Use /usr/bin/env
scripts: coccicheck: Avoid warning about spurious escape
coccinelle: api/atomic_as_refcounter: include message type in output
A single build error fix: there was a change during the merge window
to a C header parsed by the Rust bindings generator, introducing a
type that it does not handle well. The fix tells the generator to
treat the type as opaque (for now).
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Merge tag 'rust-fixes-6.3-rc1' of https://github.com/Rust-for-Linux/linux
Pull Rust fix from Miguel Ojeda:
"A single build error fix: there was a change during the merge window
to a C header parsed by the Rust bindings generator, introducing a
type that it does not handle well.
The fix tells the generator to treat the type as opaque (for now)"
* tag 'rust-fixes-6.3-rc1' of https://github.com/Rust-for-Linux/linux:
rust: bindgen: Add `alt_instr` as opaque type
Updates that missed the first pull, mostly because of needing more
soak time. Driver updates (zfcp, ufs, mpi3mr, plus two ipr bug
fixes), an enclosure services (ses) update (mostly bug fixes) and
other minor bug fixes and changes.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull more SCSI updates from James Bottomley:
"Updates that missed the first pull, mostly because of needing more
soak time.
Driver updates (zfcp, ufs, mpi3mr, plus two ipr bug fixes), an
enclosure services (ses) update (mostly bug fixes) and other minor bug
fixes and changes"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (32 commits)
scsi: zfcp: Trace when request remove fails after qdio send fails
scsi: zfcp: Change the type of all fsf request id fields and variables to u64
scsi: zfcp: Make the type for accessing request hashtable buckets size_t
scsi: ufs: core: Simplify ufshcd_execute_start_stop()
scsi: ufs: core: Rely on the block layer for setting RQF_PM
scsi: core: Extend struct scsi_exec_args
scsi: lpfc: Fix double word in comments
scsi: core: Remove the /proc/scsi/${proc_name} directory earlier
scsi: core: Fix a source code comment
scsi: cxgbi: Remove unneeded version.h include
scsi: qedi: Remove unneeded version.h include
scsi: mpi3mr: Remove unneeded version.h include
scsi: mpi3mr: Fix missing mrioc->evtack_cmds initialization
scsi: mpi3mr: Use number of bits to manage bitmap sizes
scsi: mpi3mr: Remove unnecessary memcpy() to alltgt_info->dmi
scsi: mpi3mr: Fix issues in mpi3mr_get_all_tgt_info()
scsi: mpi3mr: Fix an issue found by KASAN
scsi: mpi3mr: Replace 1-element array with flex-array
scsi: ipr: Work around fortify-string warning
scsi: ipr: Make ipr_probe_ioa_part2() return void
...
This is passing IS_ERR() instead of PTR_ERR() so instead of an error
code it prints and returns the number 1.
Fixes: 4a55ed6f89f5 ("i2c: Add GXP SoC I2C Controller")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Nick Hawkins <nick.hawkins@hpe.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
The ppc64le_allmodconfig sets I2C_PASEMI=y and leaves COMPILE_TEST to
default to y and I2C_APPLE to default to m, running into a known
incompatible configuration that breaks the build [1]. Specifically,
a common dependency (i2c-pasemi-core.o in this case) cannot be used by
both builtin and module consumers.
Disable I2C_APPLE when I2C_PASEMI is a builtin to prevent this.
[1]: https://lore.kernel.org/all/202112061809.XT99aPrf-lkp@intel.com
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
- Fix an error pointer dereference in the quark_dts Intel thermal
driver (Dan Carpenter).
- Fix the intel_bxt_pmic_thermal driver Kconfig entry to select REGMAP
which is not user-visible instead of depending on it (Randy Dunlap).
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Merge tag 'thermal-6.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more thermal control updates from Rafael Wysocki:
"These fix two issues in the Intel thermal control drivers.
Specifics:
- Fix an error pointer dereference in the quark_dts Intel thermal
driver (Dan Carpenter)
- Fix the intel_bxt_pmic_thermal driver Kconfig entry to select
REGMAP which is not user-visible instead of depending on it (Randy
Dunlap)"
* tag 'thermal-6.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
thermal: intel: BXT_PMIC: select REGMAP instead of depending on it
thermal: intel: quark_dts: fix error pointer dereference
