Re: VFS deadlock ?

From: Al Viro
Date: Thu Mar 21 2013 - 16:47:15 EST

On Thu, Mar 21, 2013 at 04:36:39PM -0400, Dave Jones wrote:
> at some point during the fuzz run, this happened..
> Mar 20 15:20:41 kernel: [ 7578.784674] fuse init (API version 7.21)
> Mar 20 15:20:41 systemd[1]: Mounting FUSE Control File System...
> Mar 20 15:20:41 systemd[1]: Mounted FUSE Control File System.
> I guess something wandered into /dev/fuse and did something. Not sure why
> systemd reacted though...

AFAICS, fuse uses d_materialise_unique() and d_splice_alias(), though, so
it's not too likely source of that crap; there's no d_instantiate() calls
at all and the sole d_add() is using an inode that has just been allocated,
so it won't be creating aliases either...
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