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authorDan Carpenter <error27@gmail.com>2010-10-04 02:28:36 +0000
committerDavid S. Miller <davem@davemloft.net>2010-10-05 00:40:39 -0700
commit4e18b3edf71f5d4ad653e3c2ff6560878e965f96 (patch)
tree63487292026992afbf5226f44bec12a1264686e9
parent51e97a12bef19b7e43199fc153cf9bd5f2140362 (diff)
downloadlinux-linaro-android-4e18b3edf71f5d4ad653e3c2ff6560878e965f96.tar.gz
cls_u32: signedness bug
skb_headroom() is unsigned so "skb_headroom(skb) + toff" is also unsigned and can't be less than zero. This test was added in 66d50d25: "u32: negative offset fix" It was supposed to fix a regression. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/sched/cls_u32.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 7416a5c73b2..b0c2a82178a 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -137,7 +137,7 @@ next_knode:
int toff = off + key->off + (off2 & key->offmask);
__be32 *data, _data;
- if (skb_headroom(skb) + toff < 0)
+ if (skb_headroom(skb) + toff > INT_MAX)
goto out;
data = skb_header_pointer(skb, toff, 4, &_data);