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D. Wythe e40b801b36 net/smc: fix potential panic dues to unprotected smc_llc_srv_add_link() 
There is a certain chance to trigger the following panic:

PID: 5900   TASK: ffff88c1c8af4100  CPU: 1   COMMAND: "kworker/1:48"
 #0 [ffff9456c1cc79a0] machine_kexec at ffffffff870665b7
 #1 [ffff9456c1cc79f0] __crash_kexec at ffffffff871b4c7a
 #2 [ffff9456c1cc7ab0] crash_kexec at ffffffff871b5b60
 #3 [ffff9456c1cc7ac0] oops_end at ffffffff87026ce7
 #4 [ffff9456c1cc7ae0] page_fault_oops at ffffffff87075715
 #5 [ffff9456c1cc7b58] exc_page_fault at ffffffff87ad0654
 #6 [ffff9456c1cc7b80] asm_exc_page_fault at ffffffff87c00b62
    [exception RIP: ib_alloc_mr+19]
    RIP: ffffffffc0c9cce3  RSP: ffff9456c1cc7c38  RFLAGS: 00010202
    RAX: 0000000000000000  RBX: 0000000000000002  RCX: 0000000000000004
    RDX: 0000000000000010  RSI: 0000000000000000  RDI: 0000000000000000
    RBP: ffff88c1ea281d00   R8: 000000020a34ffff   R9: ffff88c1350bbb20
    R10: 0000000000000000  R11: 0000000000000001  R12: 0000000000000000
    R13: 0000000000000010  R14: ffff88c1ab040a50  R15: ffff88c1ea281d00
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #7 [ffff9456c1cc7c60] smc_ib_get_memory_region at ffffffffc0aff6df [smc]
 #8 [ffff9456c1cc7c88] smcr_buf_map_link at ffffffffc0b0278c [smc]
 #9 [ffff9456c1cc7ce0] __smc_buf_create at ffffffffc0b03586 [smc]

The reason here is that when the server tries to create a second link,
smc_llc_srv_add_link() has no protection and may add a new link to
link group. This breaks the security environment protected by
llc_conf_mutex.

Fixes: 2d2209f201 ("net/smc: first part of add link processing as SMC server")
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Reviewed-by: Larysa Zaremba <larysa.zaremba@intel.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2023-02-20 08:07:01 +00:00
Documentation Certain AMD processors are vulnerable to a cross-thread return address 2023-02-14 09:17:01 -08:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
arch Certain AMD processors are vulnerable to a cross-thread return address 2023-02-14 09:17:01 -08:00
block block-6.2-2023-02-03 2023-02-03 11:35:42 -08:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-01-31 17:53:01 +09:00
crypto This update includes the following changes: 2022-12-14 12:31:09 -08:00
drivers drm fixes for 6.2 final 2023-02-16 20:23:32 -08:00
fs nfsd-6.2 fixes: 2023-02-15 11:48:56 -08:00
include drm fixes for 6.2 final 2023-02-16 20:23:32 -08:00
init Kbuild fixes for v6.2 (3rd) 2023-01-21 10:56:37 -08:00
io_uring io_uring: always prep_async for drain requests 2023-01-27 06:29:29 -07:00
ipc Non-MM patches for 6.2-rc1. 2022-12-12 17:28:58 -08:00
kernel tracing: Make trace_define_field_ext() static 2023-02-15 11:31:34 -08:00
lib 12 hotfixes, mostly against mm/. Five of these fixes are cc:stable. 2023-02-13 14:09:20 -08:00
mm 12 hotfixes, mostly against mm/. Five of these fixes are cc:stable. 2023-02-13 14:09:20 -08:00
net net/smc: fix potential panic dues to unprotected smc_llc_srv_add_link() 2023-02-20 08:07:01 +00:00
rust rust: print: avoid evaluating arguments in `pr_*` macros in `unsafe` blocks 2023-01-16 00:54:35 +01:00
samples ftrace: Export ftrace_free_filter() to modules 2023-01-24 11:20:58 -05:00
scripts 12 hotfixes, mostly against mm/. Five of these fixes are cc:stable. 2023-02-13 14:09:20 -08:00
security apparmor: Fix regression in compat permissions for getattr 2023-02-15 11:24:38 -08:00
sound sound fixes for 6.2-rc8 2023-02-10 08:37:48 -08:00
tools Fixes from the main networking tree only. 2023-02-16 12:13:58 -08:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt VFIO fixes for v6.2-rc6 2023-01-23 11:56:07 -08:00
.clang-format iommufd for 6.2 2022-12-14 09:15:43 -08:00
.cocciconfig
…
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore *.rpm 2022-12-30 17:22:14 +09:00
.mailmap 12 hotfixes, mostly against mm/. Five of these fixes are cc:stable. 2023-02-13 14:09:20 -08:00
.rustfmt.toml rust: add `.rustfmt.toml` 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: update SCTP maintainers 2023-02-02 11:35:33 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS stop mainaining UUID 2023-02-16 11:53:01 -08:00
Makefile Linux 6.2-rc8 2023-02-12 14:10:17 -08:00
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.