]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
locks: fix possible infinite loop in posix deadlock detection
authorJ. Bruce Fields <bfields@citi.umich.edu>
Tue, 30 Oct 2007 15:20:02 +0000 (11:20 -0400)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Tue, 30 Oct 2007 16:04:18 +0000 (09:04 -0700)
commit97855b49b6bac0bd25f16b017883634d13591d00
treee0895adabfda85bd9dc7514265940fdef8b1e506
parentfb7267acfef1de3e49d4e0c80be3cc603e974b3b
locks: fix possible infinite loop in posix deadlock detection

It's currently possible to send posix_locks_deadlock() into an infinite
loop (under the BKL).

For now, fix this just by bailing out after a few iterations.  We may
want to fix this in a way that better clarifies the semantics of
deadlock detection.  But that will take more time, and this minimal fix
is probably adequate for any realistic scenario, and is simple enough to
be appropriate for applying to stable kernels now.

Thanks to George Davis for reporting the problem.

Cc: "George G. Davis" <gdavis@mvista.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/locks.c