From: Svetlana Mavrina <[email protected]> There is a path in handle_vq() where kmem_cache_free() can be called with pointer to a local variable. It can happen if vq_repbuf_alloc() failed to allocate memory from cache and req is NULL.
The patch adds check if cache memory was allocated before freeing it. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Svetlana Mavrina <[email protected]> Reviewed-by: Alexey Khoroshilov <[email protected]> --- drivers/infiniband/hw/amso1100/c2_intr.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/amso1100/c2_intr.c b/drivers/infiniband/hw/amso1100/c2_intr.c index 8951db4ae29d..3a17d9b36dba 100644 --- a/drivers/infiniband/hw/amso1100/c2_intr.c +++ b/drivers/infiniband/hw/amso1100/c2_intr.c @@ -169,7 +169,8 @@ static void handle_vq(struct c2_dev *c2dev, u32 mq_index) * We should never get here, as the adapter should * never send us a reply that we're not expecting. */ - vq_repbuf_free(c2dev, host_msg); + if (reply_msg != NULL) + vq_repbuf_free(c2dev, host_msg); pr_debug("handle_vq: UNEXPECTEDLY got NULL req\n"); return; } -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
