path: root/crypto
diff options
authorEric Biggers <>2018-12-15 12:41:53 -0800
committerHerbert Xu <>2018-12-23 11:52:44 +0800
commitbb648291fc04c49197561939b8bfea0ada42bce3 (patch)
tree06d6e933c6689ac2c4699ab5f29454480cea4652 /crypto
parentf9c9bdb5131eee60dc3b92e5126d4c0e291703e2 (diff)
crypto: skcipher - add might_sleep() to skcipher_walk_virt()
skcipher_walk_virt() can still sleep even with atomic=true, since that only affects the later calls to skcipher_walk_done(). But, skcipher_walk_virt() only has to allocate memory for some input data layouts, so incorrectly calling it with preemption disabled can go undetected. Use might_sleep() so that it's detected reliably. Signed-off-by: Eric Biggers <> Signed-off-by: Herbert Xu <>
Diffstat (limited to 'crypto')
1 files changed, 2 insertions, 0 deletions
diff --git a/crypto/skcipher.c b/crypto/skcipher.c
index 17be8d9c714e..41b4f7f27f45 100644
--- a/crypto/skcipher.c
+++ b/crypto/skcipher.c
@@ -474,6 +474,8 @@ int skcipher_walk_virt(struct skcipher_walk *walk,
int err;
+ might_sleep_if(req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
walk->flags &= ~SKCIPHER_WALK_PHYS;
err = skcipher_walk_skcipher(walk, req);