crypto: x86/sha1-mb - fix panic due to unaligned access

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commit d041b55779 upstream.

struct sha1_ctx_mgr allocated in sha1_mb_mod_init() via kzalloc()
and later passed in sha1_mb_flusher_mgr_flush_avx2() function where
instructions vmovdqa used to access the struct. vmovdqa requires
16-bytes aligned argument, but nothing guarantees that struct
sha1_ctx_mgr will have that alignment. Unaligned vmovdqa will
generate GP fault.

Fix this by replacing vmovdqa with vmovdqu which doesn't have alignment
requirements.

Fixes: 2249cbb53e ("crypto: sha-mb - SHA1 multibuffer submit and flush routines for AVX2")
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Andrey Ryabinin 2017-10-16 18:51:31 +03:00 • committed by Greg Kroah-Hartman

parent 58ed8a47e4

commit ca6c028e2f

1 changed files with 6 additions and 6 deletions

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arch/x86/crypto/sha1-mb/sha1_mb_mgr_flush_avx2.S

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