3.13-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hans Schillstrom <h...@schillstrom.com>
[ Upstream commit accfe0e356327da5bd53da8852b93fc22de9b5fc ]
The commit 9195bb8e381d81d5a315f911904cdf0cfcc919b8 ("ipv6: improve
ipv6_find_hdr() to skip empty routing headers") broke ipv6_find_hdr().
When a target is specified like IPPROTO_ICMPV6 ipv6_find_hdr()
returns -ENOENT when it's found, not the header as expected.
A part of IPVS is broken and possible also nft_exthdr_eval().
When target is -1 which it is most cases, it works.
This patch exits the do while loop if the specific header is found
so the nexthdr could be returned as expected.
Reported-by: Art -kwaak- van Breemen <a...@telegraafnet.nl>
Signed-off-by: Hans Schillstrom <h...@schillstrom.com>
CC:Ansis Atteka <aatt...@nicira.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
net/ipv6/exthdrs_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv6/exthdrs_core.c
+++ b/net/ipv6/exthdrs_core.c
@@ -212,7 +212,7 @@ int ipv6_find_hdr(const struct sk_buff *
found = (nexthdr == target);
if ((!ipv6_ext_hdr(nexthdr)) || nexthdr == NEXTHDR_NONE) {
- if (target < 0)
+ if (target < 0 || found)
break;
return -ENOENT;
}
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