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Jens Axboe c59d0bfa9e block: don't allow multiple bios for IOCB_NOWAIT issue 
commit 67d59247d4 upstream.

If we're doing a large IO request which needs to be split into multiple
bios for issue, then we can run into the same situation as the below
marked commit fixes - parts will complete just fine, one or more parts
will fail to allocate a request. This will result in a partially
completed read or write request, where the caller gets EAGAIN even though
parts of the IO completed just fine.

Do the same for large bios as we do for splits - fail a NOWAIT request
with EAGAIN. This isn't technically fixing an issue in the below marked
patch, but for stable purposes, we should have either none of them or
both.

This depends on: 613b14884b ("block: handle bio_split_to_limits() NULL return")

Cc: stable@vger.kernel.org # 5.15+
Fixes: 9cea62b2cb ("block: don't allow splitting of a REQ_NOWAIT bio")
Link: https://github.com/axboe/liburing/issues/766
Reported-and-tested-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-04-19 18:00:13 +08:00
arch s390/idle: mark arch_cpu_idle() noinstr 2023-04-19 18:00:10 +08:00
block block: don't allow multiple bios for IOCB_NOWAIT issue 2023-04-19 18:00:13 +08:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2023-04-19 17:50:34 +08:00
crypto crypto: rsa-pkcs1pad - Use akcipher_request_complete 2023-04-19 17:59:48 +08:00
Documentation docs/scripts/gdb: add necessary make scripts_gdb step 2023-04-19 18:00:12 +08:00
drivers firmware: coreboot: framebuffer: Ignore reserved pixel color bits 2023-04-19 18:00:13 +08:00
fs nfsd: zero out pointers after putting nfsd_files on COPY setup error 2023-04-19 18:00:13 +08:00
include uaccess: Add minimum bounds check on kernel buffer size 2023-04-19 18:00:10 +08:00
init kbuild: Add CONFIG_PAHOLE_VERSION 2023-04-19 17:59:33 +08:00
io_uring io_uring: ensure that io_init_req() passes in the right issue_flags 2023-04-19 17:59:36 +08:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2023-04-19 17:56:54 +08:00
kernel PM: EM: fix memory leak with using debugfs_lookup() 2023-04-19 18:00:10 +08:00
lib kobject: Fix slab-out-of-bounds in fill_kobj_path() 2023-04-19 18:00:00 +08:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm/filemap: fix page end in filemap_get_read_batch 2023-04-19 17:59:29 +08:00
net scm: add user copy checks to put_cmsg() 2023-04-19 18:00:11 +08:00
samples samples: vfio-mdev: Fix missing pci_disable_device() in mdpy_fb_probe() 2023-04-19 17:57:46 +08:00
scripts builddeb: clean generated package content 2023-04-19 18:00:06 +08:00
security tomoyo: fix broken dependency on *.conf.default 2023-04-19 17:58:50 +08:00
sound ASoC: kirkwood: Iterate over array indexes instead of using pointer math 2023-04-19 18:00:12 +08:00
tools tools/power/x86/intel-speed-select: Add Emerald Rapid quirk 2023-04-19 18:00:10 +08:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2023-04-19 17:44:58 +08:00
virt kvm: Add support for arch compat vm ioctls 2023-04-19 17:55:40 +08:00
.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 kbuild: Add CONFIG_PAHOLE_VERSION 2023-04-19 17:59:33 +08:00
Makefile Linux 5.15.98 2023-04-19 17:59:36 +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.