diff options
| author | Horia Geantă <horia.geanta@nxp.com> | 2017-07-07 16:57:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-21 07:00:14 +0200 |
| commit | 5e256be7bb4e757e52289544ec24d503294bd75a (patch) | |
| tree | 15d97792825d25321a45d70cc35492d5abc7e1d4 /drivers/crypto/caam/caamhash.c | |
| parent | d060c2f05f59d6aed891e067fb6a7eafc2407b61 (diff) | |
crypto: caam - fix signals handling
commit 7459e1d25ffefa2b1be799477fcc1f6c62f6cec7 upstream.
Driver does not properly handle the case when signals interrupt
wait_for_completion_interruptible():
-it does not check for return value
-completion structure is allocated on stack; in case a signal interrupts
the sleep, it will go out of scope, causing the worker thread
(caam_jr_dequeue) to fail when it accesses it
wait_for_completion_interruptible() is replaced with uninterruptable
wait_for_completion().
We choose to block all signals while waiting for I/O (device executing
the split key generation job descriptor) since the alternative - in
order to have a deterministic device state - would be to flush the job
ring (aborting *all* in-progress jobs).
Fixes: 045e36780f115 ("crypto: caam - ahash hmac support")
Fixes: 4c1ec1f930154 ("crypto: caam - refactor key_gen, sg")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/crypto/caam/caamhash.c')
| -rw-r--r-- | drivers/crypto/caam/caamhash.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c index da4f94eab3da..718a03293ab6 100644 --- a/drivers/crypto/caam/caamhash.c +++ b/drivers/crypto/caam/caamhash.c @@ -396,7 +396,7 @@ static int hash_digest_key(struct caam_hash_ctx *ctx, const u8 *key_in, ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result); if (!ret) { /* in progress */ - wait_for_completion_interruptible(&result.completion); + wait_for_completion(&result.completion); ret = result.err; #ifdef DEBUG print_hex_dump(KERN_ERR, |