Commit f30d704f authored by Benjamin LaHaise's avatar Benjamin LaHaise
Browse files

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: default avatarBenjamin 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;

	}