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authorSascha Hlusiak <contact@saschahlusiak.de>2009-09-29 11:27:05 +0000
committerDavid S. Miller <davem@davemloft.net>2009-09-30 16:39:27 -0700
commit298bf12ddb25841804f26234a43b89da1b1c0e21 (patch)
tree9a381edac05354fcc7750feb6b30335cd2938726 /net/ipv6/sit.c
parentd99927f4d93f36553699573b279e0ff98ad7dea6 (diff)
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sit: fix off-by-one in ipip6_tunnel_get_prl
When requesting all prl entries (kprl.addr == INADDR_ANY) and there are more prl entries than there is space passed from userspace, the existing code would always copy cmax+1 entries, which is more than can be handled. This patch makes the kernel copy only exactly cmax entries. Signed-off-by: Sascha Hlusiak <contact@saschahlusiak.de> Acked-By: Fred L. Templin <Fred.L.Templin@boeing.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/sit.c')
-rw-r--r--net/ipv6/sit.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index d65e0c496cc..dbd19a78ca7 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -274,7 +274,7 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t,
c = 0;
for (prl = t->prl; prl; prl = prl->next) {
- if (c > cmax)
+ if (c >= cmax)
break;
if (kprl.addr != htonl(INADDR_ANY) && prl->addr != kprl.addr)
continue;