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Jan Kara c915d8f591 inotify: Avoid reporting event with invalid wd
When inotify_freeing_mark() races with inotify_handle_inode_event() it
can happen that inotify_handle_inode_event() sees that i_mark->wd got
already reset to -1 and reports this value to userspace which can
confuse the inotify listener. Avoid the problem by validating that wd is
sensible (and pretend the mark got removed before the event got
generated otherwise).

CC: stable@vger.kernel.org
Fixes: 7e790dd5fc ("inotify: fix error paths in inotify_update_watch")
Message-Id: <20230424163219.9250-1-jack@suse.cz>
Reported-by: syzbot+4a06d4373fd52f0b2f9c@syzkaller.appspotmail.com
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
History 2023-04-25 12:36:55 +02:00
arch nios2 minor cleanup 2023-04-24 19:43:32 -07:00
block iter-ubuf.2-2023-04-21 2023-04-24 10:29:28 -07:00
certs KEYS: Add missing function documentation 2023-04-24 16:15:52 +03:00
crypto integrity: machine keyring CA configuration 2023-04-24 16:15:53 +03:00
Documentation Changes since last update: 2023-04-24 14:25:39 -07:00
drivers v6.4/kernel.user_worker 2023-04-24 12:52:35 -07:00
fs inotify: Avoid reporting event with invalid wd 2023-04-25 12:36:55 +02:00
include legacy direct-io cleanup 2023-04-24 19:28:49 -07:00
init v6.4/kernel.user_worker 2023-04-24 12:52:35 -07:00
io_uring iter-ubuf.2-2023-04-21 2023-04-24 10:29:28 -07:00
ipc Merge branch 'work.namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2023-02-24 19:20:07 -08:00
kernel fget() to fdget() conversions 2023-04-24 19:14:20 -07:00
lib linux-kselftest-kunit-6.4-rc1 2023-04-24 12:31:32 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm write_one_page series 2023-04-24 19:20:27 -07:00
net fget() to fdget() conversions 2023-04-24 19:14:20 -07:00
rust rust: allow to use INIT_STACK_ALL_ZERO 2023-04-19 19:34:43 +02:00
samples LoongArch changes for v6.3 2023-03-01 09:27:00 -08:00
scripts RCU Changes for 6.4: 2023-04-24 12:16:14 -07:00
security Commit volume in documentation is relatively low this time, but there is 2023-04-24 12:35:49 -07:00
sound iter-ubuf.2-2023-04-21 2023-04-24 10:29:28 -07:00
tools v6.4/vfs.open 2023-04-24 14:06:41 -07:00
usr initramfs: Check negative timestamp to prevent broken cpio archive 2023-04-16 17:37:01 +09:00
virt KVM: PPC: Make KVM_CAP_IRQFD_RESAMPLE platform dependent 2023-03-31 11:19:05 -04:00
.clang-format cpumask: re-introduce constant-sized cpumask optimizations 2023-03-05 14:30:34 -08:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.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 *.dtso files 2023-02-26 15:28:23 +09:00
.gitignore linux-kselftest-kunit-6.4-rc1 2023-04-24 12:31:32 -07:00
.mailmap Networking fixes for 6.3-rc8, including fixes from netfilter and bpf 2023-04-20 11:03:51 -07:00
.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 qnx4: credit contributors in CREDITS 2023-03-14 12:56:30 -06:00
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 v6.4/kernel.user_worker 2023-04-24 12:52:35 -07:00
Makefile Linux 6.3 2023-04-23 12:02:52 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.