diff options
| author | Chris Wright <chrisw@sous-sol.org> | 2007-03-11 07:43:46 +0100 |
|---|---|---|
| committer | Adrian Bunk <bunk@stusta.de> | 2007-03-11 07:43:46 +0100 |
| commit | 3c872db41104b651851b10784b0a99c8e268c89c (patch) | |
| tree | 45812b12e927aa4820d8f366c55193a008ec9eae | |
| parent | 6d2c0df71d1ecc0ed52f0631c6aee8d7f992cc43 (diff) | |
[IPV6] fix ipv6_getsockopt_sticky copy_to_user leak
User supplied len < 0 can cause leak of kernel memory.
Use unsigned compare instead.
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 4c2a9a2e9053..0ca2526dd2e7 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -640,7 +640,7 @@ static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt, return 0; hdr = opt->hopopt; - len = min_t(int, len, ipv6_optlen(hdr)); + len = min_t(unsigned int, len, ipv6_optlen(hdr)); if (copy_to_user(optval, hdr, ipv6_optlen(hdr))) return -EFAULT; return len; |