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linux/fs/notify/fanotify
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Amir Goldstein de07e11831 fanotify: sanitize handle_type values when reporting fid 
[ Upstream commit 8631e01c2c ]

Unlike file_handle, type and len of struct fanotify_fh are u8.
Traditionally, filesystem return handle_type < 0xff, but there
is no enforecement for that in vfs.

Add a sanity check in fanotify to avoid truncating handle_type
if its value is > 0xff.

Fixes: 7cdafe6cc4 ("exportfs: check for error return value from exportfs_encode_*()")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20250627104835.184495-1-amir73il@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-08-15 12:13:51 +02:00
..
fanotify.c fanotify: sanitize handle_type values when reporting fid 2025-08-15 12:13:51 +02:00
fanotify.h fanotify: allow "weak" fsid when watching a single filesystem 2023-12-01 10:55:21 +01:00
fanotify_user.c fanotify: allow reporting errors on failure to open fd 2024-12-14 20:03:48 +01:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00