-stable review patch. If anyone has any objections, please let us know.
------------------
From: Chris Wright <[EMAIL PROTECTED]>
[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 <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
net/ipv6/ipv6_sockglue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -805,7 +805,7 @@ static int ipv6_getsockopt_sticky(struct
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;
--
-
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