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Cheng Xu 1434de50a5 RDMA/siw: Fix duplicated reported IW_CM_EVENT_CONNECT_REPLY event 
[ Upstream commit 3056fc6c32 ]

If siw_recv_mpa_rr returns -EAGAIN, it means that the MPA reply hasn't
been received completely, and should not report IW_CM_EVENT_CONNECT_REPLY
in this case. This may trigger a call trace in iw_cm. A simple way to
trigger this:
 server: ib_send_lat
 client: ib_send_lat -R <server_ip>

The call trace looks like this:

 kernel BUG at drivers/infiniband/core/iwcm.c:894!
 invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
 <...>
 Workqueue: iw_cm_wq cm_work_handler [iw_cm]
 Call Trace:
  <TASK>
  cm_work_handler+0x1dd/0x370 [iw_cm]
  process_one_work+0x1e2/0x3b0
  worker_thread+0x49/0x2e0
  ? rescuer_thread+0x370/0x370
  kthread+0xe5/0x110
  ? kthread_complete_and_exit+0x20/0x20
  ret_from_fork+0x1f/0x30
  </TASK>

Fixes: 6c52fdc244 ("rdma/siw: connection management")
Link: https://lore.kernel.org/r/dae34b5fd5c2ea2bd9744812c1d2653a34a94c67.1657706960.git.chengyou@linux.alibaba.com
Signed-off-by: Cheng Xu <chengyou@linux.alibaba.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2022-08-17 15:15:35 +02:00
arch um: random: Don't initialise hwrng struct with zero 2022-08-17 15:15:33 +02:00
block blk-mq: don't create hctx debugfs dir until q->debugfs_dir is created 2022-08-17 15:14:16 +02:00
certs certs: make system keyring depend on x509 parser 2022-07-24 12:53:55 -07:00
crypto crypto: s390 - do not depend on CRYPTO_HW for SIMD implementations 2022-07-06 20:04:06 -07:00
Documentation dt-bindings: mmc: sdhci-msm: Fix issues in yaml bindings 2022-08-17 15:15:30 +02:00
drivers RDMA/siw: Fix duplicated reported IW_CM_EVENT_CONNECT_REPLY event 2022-08-17 15:15:35 +02:00
fs kernfs: fix potential NULL dereference in __kernfs_remove 2022-08-17 15:15:26 +02:00
include soundwire: revisit driver bind/unbind and callbacks 2022-08-17 15:15:28 +02:00
init stack: Declare {randomize_,}kstack_offset to fix Sparse warnings 2022-08-17 15:14:14 +02:00
io_uring io_uring: Don't require reinitable percpu_ref 2022-08-17 15:14:20 +02:00
ipc ipc: Free mq_sysctls if ipc namespace creation failed 2022-06-22 17:47:41 -05:00
kernel wireguard: ratelimiter: use hrtimer in selftest 2022-08-17 15:14:59 +02:00
lib lib/test_hmm: avoid accessing uninitialized pages 2022-08-17 15:15:20 +02:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm: percpu: use kmemleak_ignore_phys() instead of kmemleak_free() 2022-08-17 15:15:34 +02:00
net dccp: put dccp_qpolicy_full() and dccp_qpolicy_push() in the same lock 2022-08-17 15:14:59 +02:00
samples sample: bpf: xdp_router_ipv4: Allow the kernel to send arp requests 2022-08-17 15:14:25 +02:00
scripts scripts/gdb: Fix gdb 'lx-symbols' command 2022-07-21 10:40:55 -07:00
security selinux: Add boundary check in put_entry() 2022-08-17 15:14:06 +02:00
sound devcoredump: remove the useless gfp_t parameter in dev_coredumpv and dev_coredumpm 2022-08-17 15:15:21 +02:00
tools rtla/utils: Use calloc and check the potential memory allocation failure 2022-08-17 15:15:30 +02:00
usr Not a lot of material this cycle. Many singleton patches against various 2022-05-27 11:22:03 -07:00
virt KVM: Don't set Accessed/Dirty bits for ZERO_PAGE 2022-08-17 15:15:21 +02:00
.clang-format clang-format: Fix space after for_each macros 2022-05-20 19:27:16 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.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 kbuild: split the second line of *.mod into *.usyms 2022-05-08 03:16:59 +09:00
.mailmap ARM: SoC fixes for 5.19, part 4 2022-07-27 09:43:07 -07:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: mark ARM/PALM TREO SUPPORT orphan 2022-07-07 15:17:00 +02:00
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 io_uring: move to separate directory 2022-08-17 15:14:20 +02:00
Makefile io_uring: move to separate directory 2022-08-17 15:14:20 +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.