[PATCH v1 2/2] async_tx: fix possible negative array indexing

[Rayagonda Kokatanur]

Fix possible negative array index read in __2data_recov_5() function.

Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@xxxxxxxxxxxx>
---
 crypto/async_tx/async_raid6_recov.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/async_tx/async_raid6_recov.c b/crypto/async_tx/async_raid6_recov.c
index 33f2a8f8c9f4..9cd016cb2d09 100644
--- a/crypto/async_tx/async_raid6_recov.c
+++ b/crypto/async_tx/async_raid6_recov.c
@@ -206,7 +206,7 @@ __2data_recov_5(int disks, size_t bytes, int faila, int failb,
 		good_srcs++;
 	}
 
-	if (good_srcs > 1)
+	if ((good_srcs > 1) || (good < 0))
 		return NULL;
 
 	p = blocks[disks-2];
-- 
2.17.1