Initialize the intermediary array member to 0 to prevent the kernel from leaking uninitialized data to user space. Reported-by: syzbot+e8bcd7ee3db6cb5cb875@xxxxxxxxxxxxxxxxxxxxxxxxx Closes: https://syzkaller.appspot.com/bug?extid=e8bcd7ee3db6cb5cb875 Tested-by: syzbot+e8bcd7ee3db6cb5cb875@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Edward Adam Davis <eadavis@xxxxxx> --- crypto/jitterentropy-kcapi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/crypto/jitterentropy-kcapi.c b/crypto/jitterentropy-kcapi.c index c24d4ff2b4a8..9e9e069f55af 100644 --- a/crypto/jitterentropy-kcapi.c +++ b/crypto/jitterentropy-kcapi.c @@ -107,7 +107,7 @@ int jent_hash_time(void *hash_state, __u64 time, u8 *addtl, { struct shash_desc *hash_state_desc = (struct shash_desc *)hash_state; SHASH_DESC_ON_STACK(desc, hash_state_desc->tfm); - u8 intermediary[SHA3_256_DIGEST_SIZE]; + u8 intermediary[SHA3_256_DIGEST_SIZE] = { 0 }; __u64 j = 0; int ret; -- 2.43.0
