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[v2,4/4] crypto: Documentation: fix none signal safe sample

Message ID 1495114167-3073-5-git-send-email-gilad@benyossef.com
State New
Headers show
Series crypto: async crypto op fixes | expand

Commit Message

Gilad Ben-Yossef May 18, 2017, 1:29 p.m. UTC 
The sample code was showing use of wait_for_completion_interruptible()
for waiting for an async. crypto op to finish. However, if a signal
arrived it would free the buffers used even while crypto HW might
still DMA from/into the buffers.

Resolve this by using wait_for_completion() instead.

Reported-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>

---
 Documentation/crypto/api-samples.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.1.4
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Patch

diff --git a/Documentation/crypto/api-samples.rst b/Documentation/crypto/api-samples.rst
index d021fd9..944f08b 100644
--- a/Documentation/crypto/api-samples.rst
+++ b/Documentation/crypto/api-samples.rst
@@ -48,7 +48,7 @@  Code Example For Symmetric Key Cipher Operation
             break;
         case -EINPROGRESS:
         case -EBUSY:
-            rc = wait_for_completion_interruptible(
+            rc = wait_for_completion(
                 &sk->result.completion);
             if (!rc && !sk->result.err) {
                 reinit_completion(&sk->result.completion);