diff options
| author | Gilad Ben-Yossef <gilad@benyossef.com> | 2017-05-18 16:29:24 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-05-23 12:45:11 +0800 |
| commit | fbe4f68c5f4b4fc157b70217216ac44b8a01cf4e (patch) | |
| tree | a0a066fec57b47156e4f52b5bf092ab0c1279211 /crypto/drbg.c | |
| parent | 548b37ff50e23c4d92f3878e70cebc12dd365352 (diff) | |
| download | linux-crypto-fbe4f68c5f4b4fc157b70217216ac44b8a01cf4e.tar.gz linux-crypto-fbe4f68c5f4b4fc157b70217216ac44b8a01cf4e.zip | |
crypto: drbg - wait for crypto op not signal safe
drbg_kcapi_sym_ctr() 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 output buffer.
Resolve this by using wait_for_completion() instead.
Reported-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
CC: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/drbg.c')
| -rw-r--r-- | crypto/drbg.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/crypto/drbg.c b/crypto/drbg.c index fa749f47..cdb27ac4 100644 --- a/crypto/drbg.c +++ b/crypto/drbg.c @@ -1767,9 +1767,8 @@ static int drbg_kcapi_sym_ctr(struct drbg_state *drbg, break; case -EINPROGRESS: case -EBUSY: - ret = wait_for_completion_interruptible( - &drbg->ctr_completion); - if (!ret && !drbg->ctr_async_err) { + wait_for_completion(&drbg->ctr_completion); + if (!drbg->ctr_async_err) { reinit_completion(&drbg->ctr_completion); break; } |