fanotify: initialize permission event watchdog state

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fanotify permission events are allocated with kmem_cache_alloc(), but
fanotify_alloc_perm_event() does not initialize watchdog_cnt.

The watchdog reads watchdog_cnt after the event is moved to access_list.
A stale value can make it warn too early or skip the warning.

Initialize watchdog_cnt when allocating a permission event.

Fixes: b8cf8fda52 ("fanotify: add watchdog for permission events")
Signed-off-by: Xuanqiang Luo <luoxuanqiang@kylinos.cn>
Link: https://patch.msgid.link/20260703031345.9354-1-xuanqiang.luo@linux.dev
Signed-off-by: Jan Kara <jack@suse.cz>

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Xuanqiang Luo 2026-07-03 11:13:45 +08:00 • committed by Jan Kara

parent 4a50a141f0

commit a3aa899823

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fs/notify/fanotify/fanotify.c

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