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| author | Mian Yousaf Kaukab <ykaukab@suse.de> | 2021-07-21 10:39:05 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-07-30 10:58:36 +0800 |
| commit | cb8c3fae83d2795cdd2a5e0d3aa66bc21e06ca9a (patch) | |
| tree | b77725f4ad561fa159964d937b38e398f97cf51c /crypto/wp512.c | |
| parent | b44e76fdb3f07b9d417c1a5ea0c7b7c54edb1028 (diff) | |
| download | linux-crypto-cb8c3fae83d2795cdd2a5e0d3aa66bc21e06ca9a.tar.gz linux-crypto-cb8c3fae83d2795cdd2a5e0d3aa66bc21e06ca9a.zip | |
crypto: ecc - handle unaligned input buffer in ecc_swap_digits
ecdsa_set_pub_key() makes an u64 pointer at 1 byte offset of the key.
This results in an unaligned u64 pointer. This pointer is passed to
ecc_swap_digits() which assumes natural alignment.
This causes a kernel crash on an armv7 platform:
[ 0.409022] Unhandled fault: alignment exception (0x001) at 0xc2a0a6a9
...
[ 0.416982] PC is at ecdsa_set_pub_key+0xdc/0x120
...
[ 0.491492] Backtrace:
[ 0.492059] [<c07c266c>] (ecdsa_set_pub_key) from [<c07c75d4>] (test_akcipher_one+0xf4/0x6c0)
Handle unaligned input buffer in ecc_swap_digits() by replacing
be64_to_cpu() to get_unaligned_be64(). Change type of in pointer to
void to reflect it doesn’t necessarily need to be aligned.
Fixes: ef4af956b9d0 ("crypto: ecdsa - Add support for ECDSA signature verification")
Reported-by: Guillaume Gardet <guillaume.gardet@arm.com>
Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Tested-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/wp512.c')
0 files changed, 0 insertions, 0 deletions