crypto_gcm_setkey() was using wait_for_completion_interruptible() to
wait for completion of async crypto op but if a signal occurs it
may return before DMA ops of HW crypto provider finish, thus
corrupting the data buffer that is kfree'ed in this case.
Resolve this by using wait_for_completion() instead.
Reported-by: Eric Biggers <ebiggers3@xxxxxxxxx>
Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
CC: stable@xxxxxxxxxxxxxxx
---
crypto/gcm.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/crypto/gcm.c b/crypto/gcm.c
index b7ad808..3841b5e 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -152,10 +152,8 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
err = crypto_skcipher_encrypt(&data->req);
if (err == -EINPROGRESS || err == -EBUSY) {
- err = wait_for_completion_interruptible(
- &data->result.completion);
- if (!err)
- err = data->result.err;
+ wait_for_completion(&data->result.completion);
+ err = data->result.err;
}
if (err)
--
2.1.4