If mock_chain() returns NULL, NULL pointer is dereferenced in dma_fence_enable_sw_signaling().

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Pavel Sakharov p.sakharov@ispras.ru

Fixes: d62c43a953ce ("dma-buf: Enable signaling on fence for selftests") --- drivers/dma-buf/st-dma-fence-chain.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/dma-buf/st-dma-fence-chain.c b/drivers/dma-buf/st-dma-fence-chain.c index c0979c8049b5..661de4add4c7 100644 --- a/drivers/dma-buf/st-dma-fence-chain.c +++ b/drivers/dma-buf/st-dma-fence-chain.c @@ -84,11 +84,11 @@ static int sanitycheck(void *arg) return -ENOMEM;

chain = mock_chain(NULL, f, 1); - if (!chain) + if (chain) + dma_fence_enable_sw_signaling(chain); + else err = -ENOMEM;

- dma_fence_enable_sw_signaling(chain); - dma_fence_signal(f); dma_fence_put(f);