crypto: af_alg - fix possible uninit-value in alg_bind()
authorEric Dumazet <edumazet@google.com>
Sat, 7 Apr 2018 20:42:36 +0000 (13:42 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sun, 8 Apr 2018 02:32:31 +0000 (22:32 -0400)
commita466856e0b7ab269cdf9461886d007e88ff575b0
treee21908fe4aab1743d2da862b976bfec09b371d22
parentf12c643209db0626f2f54780d86bb93bfa7a9c2d
crypto: af_alg - fix possible uninit-value in alg_bind()

syzbot reported :

BUG: KMSAN: uninit-value in alg_bind+0xe3/0xd90 crypto/af_alg.c:162

We need to check addr_len before dereferencing sa (or uaddr)

Fixes: bb30b8848c85 ("crypto: af_alg - whitelist mask and type")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Stephan Mueller <smueller@chronox.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
crypto/af_alg.c