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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>

2025-08-15 12:13:51 +02:00

dnotify

fix a leak in fcntl_dirnotify()

2025-07-24 08:56:30 +02:00

fanotify

fanotify: sanitize handle_type values when reporting fid

2025-08-15 12:13:51 +02:00

inotify

fsnotify: Avoid data race between fsnotify_recalc_mask() and fsnotify_object_watched()

2024-10-02 15:11:40 +02:00

fdinfo.c

fs: relax assertions on failure to encode file handles