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| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2017-10-16 18:51:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-15 10:04:13 +0100 |
| commit | cb870a365af45b69b4bcb3323066a681e37ed4aa (patch) | |
| tree | 912de31e7057d125d26b9ce6e3561499c40d5ac4 | |
| parent | c64cc4117fecbcd048f84aaa0af47a2542dc04a5 (diff) | |
| download | linux-cb870a365af45b69b4bcb3323066a681e37ed4aa.tar.gz linux-cb870a365af45b69b4bcb3323066a681e37ed4aa.tar.bz2 linux-cb870a365af45b69b4bcb3323066a681e37ed4aa.zip | |
crypto: x86/sha1-mb - fix panic due to unaligned access
commit d041b557792c85677f17e08eee535eafbd6b9aa2 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: 2249cbb53ead ("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>
| -rw-r--r-- | arch/x86/crypto/sha-mb/sha1_mb_mgr_flush_avx2.S | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/x86/crypto/sha-mb/sha1_mb_mgr_flush_avx2.S b/arch/x86/crypto/sha-mb/sha1_mb_mgr_flush_avx2.S index 85c4e1cf7172..e1693457c178 100644 --- a/arch/x86/crypto/sha-mb/sha1_mb_mgr_flush_avx2.S +++ b/arch/x86/crypto/sha-mb/sha1_mb_mgr_flush_avx2.S @@ -174,8 +174,8 @@ LABEL skip_ %I .endr # Find min length - vmovdqa _lens+0*16(state), %xmm0 - vmovdqa _lens+1*16(state), %xmm1 + vmovdqu _lens+0*16(state), %xmm0 + vmovdqu _lens+1*16(state), %xmm1 vpminud %xmm1, %xmm0, %xmm2 # xmm2 has {D,C,B,A} vpalignr $8, %xmm2, %xmm3, %xmm3 # xmm3 has {x,x,D,C} @@ -195,8 +195,8 @@ LABEL skip_ %I vpsubd %xmm2, %xmm0, %xmm0 vpsubd %xmm2, %xmm1, %xmm1 - vmovdqa %xmm0, _lens+0*16(state) - vmovdqa %xmm1, _lens+1*16(state) + vmovdqu %xmm0, _lens+0*16(state) + vmovdqu %xmm1, _lens+1*16(state) # "state" and "args" are the same address, arg1 # len is arg2 @@ -260,8 +260,8 @@ ENTRY(sha1_mb_mgr_get_comp_job_avx2) jc .return_null # Find min length - vmovdqa _lens(state), %xmm0 - vmovdqa _lens+1*16(state), %xmm1 + vmovdqu _lens(state), %xmm0 + vmovdqu _lens+1*16(state), %xmm1 vpminud %xmm1, %xmm0, %xmm2 # xmm2 has {D,C,B,A} vpalignr $8, %xmm2, %xmm3, %xmm3 # xmm3 has {x,x,D,C} |