| Date | Tue, 30 Mar 2010 15:48:33 -0700 | From | Greg KH <> | Subject | [13/45] sit: fix off-by-one in ipip6_tunnel_get_prl |
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2.6.27-stable review patch. If anyone has any objections, please let us know.
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From: Sascha Hlusiak <contact@saschahlusiak.de>
commit 298bf12ddb25841804f26234a43b89da1b1c0e21 upstream.
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> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- net/ipv6/sit.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -260,7 +260,7 @@ static int ipip6_tunnel_get_prl(struct i 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;
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