Slab corruption in fanotify_free_event()

[Jiri Kosina]

Hi,

booting current Linus' tree (df32e43a), I am getting

 Slab corruption (Not tainted): fanotify_event_info start=ffff8800372e3320, len=64
 Redzone: 0x9f911029d74e35b/0x9f911029d74e35b.
 Last user: [<ffffffff811e0bdd>](fanotify_free_event+0x2d/0x40)
 030: 6b 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 6b 6b 6b a5  kkkkkkkk....kkk.
 Prev obj: start=ffff8800372e32c8, len=64
 Redzone: 0x9f911029d74e35b/0x9f911029d74e35b.
 Last user: [<ffffffff811e0bdd>](fanotify_free_event+0x2d/0x40)
 000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
 010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
 Next obj: start=ffff8800372e3378, len=64
 Redzone: 0x9f911029d74e35b/0x9f911029d74e35b.
 Last user: [<ffffffff811e0bdd>](fanotify_free_event+0x2d/0x40)
 000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
 010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk

I guess this is due to

	commit 7053aee26a3548ebaba046ae2e52396ccf56ac6c
	Author: Jan Kara <jack@xxxxxxx>
	Date:   Tue Jan 21 15:48:14 2014 -0800

	    fsnotify: do not share events between notification groups

as I am not able to see any other recent changes in that area. Haven't 
been looking at the patch closely enough to debug this yet ... sending 
this as an early heads-up.

-- 
Jiri Kosina
SUSE Labs
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