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| author | Gilad Ben-Yossef <gilad@benyossef.com> | 2017-05-18 16:29:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-14 15:05:55 +0200 |
| commit | d4783eb9f0828cfc439e7deeaaa19b08b7665932 (patch) | |
| tree | 58aca2d17484a8dc343e6ebac1a47b14ce9c5a48 | |
| parent | 2d0280070e6c3f0028ca462b59db5c0a45d36299 (diff) | |
| download | linux-stable-d4783eb9f0828cfc439e7deeaaa19b08b7665932.tar.gz linux-stable-d4783eb9f0828cfc439e7deeaaa19b08b7665932.tar.bz2 linux-stable-d4783eb9f0828cfc439e7deeaaa19b08b7665932.zip | |
crypto: gcm - wait for crypto op not signal safe
commit f3ad587070d6bd961ab942b3fd7a85d00dfc934b upstream.
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@gmail.com>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | crypto/gcm.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/crypto/gcm.c b/crypto/gcm.c index f624ac98c94e..dd33fbd2d868 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) |