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fsnotify: Allocate overflow events with proper type

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Commit 7053aee26a "fsnotify: do not share events between notification
groups" used overflow event statically allocated in a group with the
size of the generic notification event. This causes problems because
some code looks at type specific parts of event structure and gets
confused by a random data it sees there and causes crashes.

Fix the problem by allocating overflow event with type corresponding to
the group type so code cannot get confused.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2014-02-21 19:14:11 +01:00
parent 482ef06c5e
commit ff57cd5863
5 changed files with 35 additions and 4 deletions
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2
include/linux/fsnotify_backend.h
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@ -160,7 +160,7 @@ struct fsnotify_group {
struct fasync_struct *fsn_fa; /* async notification */
struct fsnotify_event overflow_event; /* Event we queue when the
struct fsnotify_event *overflow_event; /* Event we queue when the
* notification list is too
* full */