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Jens Axboe 34a7e5021a io_uring/net: save msghdr->msg_control for retries 
Commit cac9e4418f upstream.

If the application sets ->msg_control and we have to later retry this
command, or if it got queued with IOSQE_ASYNC to begin with, then we
need to retain the original msg_control value. This is due to the net
stack overwriting this field with an in-kernel pointer, to copy it
in. Hitting that path for the second time will now fail the copy from
user, as it's attempting to copy from a non-user address.

Cc: stable@vger.kernel.org # 5.10+
Link: https://github.com/axboe/liburing/issues/880
Reported-and-tested-by: Marek Majkowski <marek@cloudflare.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-06-28 10:29:44 +02:00
arch Remove DECnet support from kernel 2023-06-21 15:59:15 +02:00
block blk-iocost: avoid 64-bit division in ioc_timer_fn 2023-06-14 11:13:00 +02:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto KEYS: asymmetric: Copy sig and digest in public_key_verify_signature() 2023-06-09 10:32:34 +02:00
Documentation Remove DECnet support from kernel 2023-06-21 15:59:15 +02:00
drivers regmap: spi-avmm: Fix regmap_bus max_raw_write 2023-06-28 10:29:44 +02:00
fs nilfs2: fix buffer corruption due to concurrent device reads 2023-06-28 10:29:42 +02:00
include writeback: fix dereferencing NULL mapping->host on writeback_page_template 2023-06-28 10:29:44 +02:00
init kbuild: Add CONFIG_PAHOLE_VERSION 2023-02-25 12:06:45 +01:00
io_uring io_uring/net: save msghdr->msg_control for retries 2023-06-28 10:29:44 +02:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2022-12-08 11:28:45 +01:00
kernel cgroup: Do not corrupt task iteration when rebinding subsystem 2023-06-28 10:29:43 +02:00
lib test_firmware: fix a memory leak with reqs buffer 2023-06-21 15:59:12 +02:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm writeback, cgroup: fix null-ptr-deref write in bdi_split_work_to_wbs 2023-05-11 23:00:18 +09:00
net neighbour: delete neigh_lookup_nodev as not used 2023-06-21 15:59:19 +02:00
samples samples/bpf: Fix fout leak in hbm's run_bpf_prog 2023-05-24 17:36:45 +01:00
scripts gcc-plugins: Reorganize gimple includes for GCC 13 2023-06-14 11:12:59 +02:00
security selinux: don't use make's grouped targets feature yet 2023-06-09 10:32:32 +02:00
sound ALSA: hda/realtek: Add a quirk for Compaq N14JP6 2023-06-21 15:59:15 +02:00
tools selftests: mptcp: join: skip check if MIB counter not supported 2023-06-28 10:29:41 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt KVM: Avoid illegal stage2 mapping on invalid memory slot 2023-06-28 10:29:42 +02:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.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 .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
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 15:59:15 +02:00
Makefile Linux 5.15.118 2023-06-21 15:59:19 +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.