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authorStephan Mueller <smueller@chronox.de>2018-07-07 20:41:47 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2018-07-13 18:24:23 +0800
commit2546da99212f22034aecf279da9c47cbfac6c981 (patch)
treee7812d62c3febd6ce73707e9442610253e8a774b /crypto
parent221e00d1fce976d8a04ff591a0150caf84e176f8 (diff)
downloadlinux-2546da99212f22034aecf279da9c47cbfac6c981.tar.bz2
crypto: af_alg - Initialize sg_num_bytes in error code path
The RX SGL in processing is already registered with the RX SGL tracking list to support proper cleanup. The cleanup code path uses the sg_num_bytes variable which must therefore be always initialized, even in the error code path. Signed-off-by: Stephan Mueller <smueller@chronox.de> Reported-by: syzbot+9c251bdd09f83b92ba95@syzkaller.appspotmail.com #syz test: https://github.com/google/kmsan.git master CC: <stable@vger.kernel.org> #4.14 Fixes: e870456d8e7c ("crypto: algif_skcipher - overhaul memory management") Fixes: d887c52d6ae4 ("crypto: algif_aead - overhaul memory management") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/af_alg.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index 7846c0c20cfe..b52a14fc3bae 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -1156,8 +1156,10 @@ int af_alg_get_rsgl(struct sock *sk, struct msghdr *msg, int flags,
/* make one iovec available as scatterlist */
err = af_alg_make_sg(&rsgl->sgl, &msg->msg_iter, seglen);
- if (err < 0)
+ if (err < 0) {
+ rsgl->sg_num_bytes = 0;
return err;
+ }
/* chain the new scatterlist with previous one */
if (areq->last_rsgl)