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(parent: 0cabf2a) | patch
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)
commitb61907bb42409adf9b3120f741af7c57dd7e3db2
tree5e2e631bddf0f13336e2c52ac93cbce361bfcbd7tree | snapshot
parent0cabf2af6f5ac3c88cb106c4e06087a5a39b8e1ecommit | diff
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 diff | blob | history
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