Commit f30d704f authored Aug 07, 2013 by Benjamin LaHaise

aio: table lookup: verify ctx pointer



Another shortcoming of the table lookup patch was revealed where the pointer
was not being tested before being dereferenced.  Verify this to avoid the
NULL pointer dereference.

Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>

parent 0bdd5ca5

fs/aio.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -812,7 +812,7 @@ static struct kioctx *lookup_ioctx(unsigned long ctx_id)
		goto out;

		ctx = table->table[id];
		if (ctx->user_id == ctx_id) {
		if (ctx && ctx->user_id == ctx_id) {
		percpu_ref_get(&ctx->users);
		ret = ctx;
		}