David Teigland c78a87d0a1 dlm: fix plock use-after-free ...

Fix a regression from the original addition of nfs lock support
586759f03e.  When a synchronous
(non-nfs) plock completes, the waiting thread will wake up and
free the op struct.  This races with the user thread in
dev_write() which goes on to read the op's callback field to
check if the lock is async and needs a callback.  This check
can happen on the freed op.  The fix is to note the callback
value before the op can be freed.

Signed-off-by: David Teigland <teigland@redhat.com>

2009-06-18 13:42:42 -05:00

9.8 KiB

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