lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:	Fri, 28 Sep 2012 11:21:19 +0300
From:	Dan Carpenter <>
To:	"David S. Miller" <>
Cc:	"Eric W. Biederman" <>,
	Eric Dumazet <>,
	Stephen Hemminger <>,,
Subject: [patch] net/key/af_key.c: add range checks on ->sadb_x_policy_len

Because sizeof() is size_t then if "len" is negative, it counts as a
large positive value.

The call tree looks like:
-> pfkey_process()
   -> pfkey_spdadd()
      -> parse_ipsecrequests()

Signed-off-by: Dan Carpenter <>
This is a static checker fix.  I'm not very familiar with this code.
I think if we were to hit this then we would try to parse invalid data
and it would return -EINVAL or similar error code pretty quickly.

diff --git a/net/key/af_key.c b/net/key/af_key.c
index 2ca7d7f..7714df0 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1923,6 +1923,9 @@ parse_ipsecrequests(struct xfrm_policy *xp, struct sadb_x_policy *pol)
 	int len = pol->sadb_x_policy_len*8 - sizeof(struct sadb_x_policy);
 	struct sadb_x_ipsecrequest *rq = (void*)(pol+1);
+	if (pol->sadb_x_policy_len * 8 < sizeof(struct sadb_x_policy))
+		return -EINVAL;
 	while (len >= sizeof(struct sadb_x_ipsecrequest)) {
 		if ((err = parse_ipsecrequest(xp, rq)) < 0)
 			return err;
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists