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ipv6: IPV6_PKTINFO relied userspace providing correct length
author
Ilpo Järvinen
<ilpo.jarvinen@helsinki.fi>
Mon, 5 Jan 2009 01:27:31 +0000
(17:27 -0800)
committer
David S. Miller
<davem@davemloft.net>
Mon, 5 Jan 2009 01:27:31 +0000
(17:27 -0800)
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Reported-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv6/ipv6_sockglue.c
patch
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diff --git
a/net/ipv6/ipv6_sockglue.c
b/net/ipv6/ipv6_sockglue.c
index
eeeaad2
..
40f3246
100644
(file)
--- a/
net/ipv6/ipv6_sockglue.c
+++ b/
net/ipv6/ipv6_sockglue.c
@@
-404,7
+404,7
@@
sticky_done:
else if (optlen < sizeof(struct in6_pktinfo) || optval == NULL)
goto e_inval;
- if (copy_from_user(&pkt, optval,
optlen
)) {
+ if (copy_from_user(&pkt, optval,
sizeof(struct in6_pktinfo)
)) {
retv = -EFAULT;
break;
}