]> git.baikalelectronics.ru Git - kernel.git/commit
crypto: shash - Fix zero-length shash ahash digest crash
authorHerbert Xu <herbert@gondor.apana.org.au>
Mon, 9 Oct 2017 15:30:02 +0000 (23:30 +0800)
committerHerbert Xu <herbert@gondor.apana.org.au>
Tue, 10 Oct 2017 16:34:07 +0000 (00:34 +0800)
commit45c81e0a5e4fad6bbe12138a629880aacecba5c2
tree5e2e631bddf0f13336e2c52ac93cbce361bfcbd7
parent29c3b5237b2f0334c41deda44048b6450b1aac26
crypto: shash - Fix zero-length shash ahash digest crash

The shash ahash digest adaptor function may crash if given a
zero-length input together with a null SG list.  This is because
it tries to read the SG list before looking at the length.

This patch fixes it by checking the length first.

Cc: <stable@vger.kernel.org>
Reported-by: Stephan Müller<smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Stephan Müller <smueller@chronox.de>
crypto/shash.c