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Commit f8b11260 authored by Eric Wheeler's avatar Eric Wheeler Committed by Jens Axboe
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bcache: fix cache_set_flush() NULL pointer dereference on OOM 



When bch_cache_set_alloc() fails to kzalloc the cache_set, the
asyncronous closure handling tries to dereference a cache_set that
hadn't yet been allocated inside of cache_set_flush() which is called
by __cache_set_unregister() during cleanup.  This appears to happen only
during an OOM condition on bcache_register.

Signed-off-by: default avatarEric Wheeler <bcache@linux.ewheeler.net>
Cc: stable@vger.kernel.org
parent 9b299728

drivers/md/bcache/super.c

+3 −0
Original line number Diff line number Diff line
@@ -1373,6 +1373,9 @@ static void cache_set_flush(struct closure *cl) 
	struct btree *b;

	unsigned i;



	if (!c)

		closure_return(cl);



	bch_cache_accounting_destroy(&c->accounting);



	kobject_put(&c->internal);