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Bob Pearson de5a059e36 RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt 
commit 2b23b6097303ed0ba5f4bc036a1c07b6027af5c6 upstream.

In rxe_comp_queue_pkt() an incoming response packet skb is enqueued to the
resp_pkts queue and then a decision is made whether to run the completer
task inline or schedule it. Finally the skb is dereferenced to bump a 'hw'
performance counter. This is wrong because if the completer task is
already running in a separate thread it may have already processed the skb
and freed it which can cause a seg fault.  This has been observed
infrequently in testing at high scale.

This patch fixes this by changing the order of enqueuing the packet until
after the counter is accessed.

Link: https://lore.kernel.org/r/20240329145513.35381-4-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Fixes: 0b1e5b99a4 ("IB/rxe: Add port protocol stats")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
[Sherry: bp to fix CVE-2024-38544. Fix conflict due to missing commit:
dccb23f6c312 ("RDMA/rxe: Split rxe_run_task() into two subroutines")
which is not necessary to backport]
Signed-off-by: Sherry Yang <sherry.yang@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-10-17 15:08:32 +02:00
arch s390/cpum_sf: Remove WARN_ON_ONCE statements 2024-10-17 15:08:30 +02:00
block blk_iocost: fix more out of bound shifts 2024-10-17 15:08:10 +02:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:13:17 +02:00
crypto crypto: aead,cipher - zeroize key buffer after use 2024-07-18 13:05:38 +02:00
Documentation arm64: errata: Expand speculative SSBS workaround once more 2024-10-17 15:08:26 +02:00
drivers RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt 2024-10-17 15:08:32 +02:00
fs ext4: nested locking for xattr inode 2024-10-17 15:08:30 +02:00
include PCI: Add function 0 DMA alias quirk for Glenfly Arise chip 2024-10-17 15:08:31 +02:00
init init/main.c: Fix potential static_command_line memory overflow 2024-05-02 16:23:39 +02:00
io_uring io_uring/io-wq: limit retrying worker initialisation 2024-08-19 05:41:03 +02:00
ipc ipc: replace costly bailout check in sysvipc_find_ipc() 2024-09-04 13:17:44 +02:00
kernel bpf: Check percpu map value size first 2024-10-17 15:08:30 +02:00
lib debugobjects: Fix conditions in fill_pool() 2024-10-17 15:08:02 +02:00
LICENSES LICENSES/deprecated: add Zlib license text 2020-09-16 14:33:49 +02:00
mm mm: krealloc: consider spare memory for __GFP_ZERO 2024-10-17 15:08:21 +02:00
net tcp: avoid reusing FIN_WAIT2 when trying to find port in connect() process 2024-10-17 15:08:12 +02:00
samples Add gitignore file for samples/fanotify/ subdirectory 2024-08-19 05:41:21 +02:00
scripts kconfig: qconf: fix buffer overflow in debug links 2024-10-17 15:08:25 +02:00
security tomoyo: fallback to realpath if symlink's pathname does not exist 2024-10-17 15:08:24 +02:00
sound PCI: Add function 0 DMA alias quirk for Glenfly Arise chip 2024-10-17 15:08:31 +02:00
tools tools/iio: Add memory allocation failure check for trigger_name 2024-10-17 15:08:32 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:25:48 +01:00
virt KVM: Always flush async #PF workqueue when vCPU is being destroyed 2024-04-13 12:58:04 +02:00
.clang-format RDMA 5.10 pull request 2020-10-17 11:18:18 -07:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Remove *.orig pattern from .gitignore 2024-10-17 15:07:59 +02:00
.mailmap mailmap: add two more addresses of Uwe Kleine-König 2020-12-06 10:19:07 -08:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Jason Cooper to CREDITS 2020-11-30 10:20:34 +01:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Remove DECnet support from kernel 2023-06-21 15:45:38 +02:00
Makefile Linux 5.10.226 2024-09-12 11:06:51 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.