[prev in list] [next in list] [prev in thread] [next in thread]
List: linaro-mm-sig
Subject: [Linaro-mm-sig] [PATCH] dma-buf: Fix NULL pointer dereference in sanitycheck()
From: Pavel Sakharov <p.sakharov () ispras ! ru>
Date: 2024-03-19 23:15:23
Message-ID: 20240319231527.1821372-1-p.sakharov () ispras ! ru
[Download RAW message or body]
If due to a memory allocation failure mock_chain() returns NULL, it is
passed to dma_fence_enable_sw_signaling() resulting in NULL pointer
dereference there.
Call dma_fence_enable_sw_signaling() only if mock_chain() succeeds.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: d62c43a953ce ("dma-buf: Enable signaling on fence for selftests")
Signed-off-by: Pavel Sakharov <p.sakharov@ispras.ru>
---
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 9c2a0c082a76..ed4b323886e4 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);
--
2.44.0
_______________________________________________
Linaro-mm-sig mailing list -- linaro-mm-sig@lists.linaro.org
To unsubscribe send an email to linaro-mm-sig-leave@lists.linaro.org
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic