-stable review patch. If anyone has any objections, please let us know.
------------------
[NET]: 2.6.13 breaks libpcap (and tcpdump)
Patrick McHardy says:
Never mind, I got it, we never fall through to the second switch
statement anymore. I think we could simply break when load_pointer
returns NULL. The switch statement will fall through to the default
case and return 0 for all cases but 0 > k >= SKF_AD_OFF.
Here's a patch to do just that.
I left BPF_MSH alone because it's really a hack to calculate the IP
header length, which makes no sense when applied to the special data.
Signed-off-by: Herbert Xu <[email protected]>
Signed-off-by: "David S. Miller" <[email protected]>
Signed-off-by: Chris Wright <[email protected]>
---
net/core/filter.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
Index: linux-2.6.13.y/net/core/filter.c
===================================================================
--- linux-2.6.13.y.orig/net/core/filter.c
+++ linux-2.6.13.y/net/core/filter.c
@@ -182,7 +182,7 @@ int sk_run_filter(struct sk_buff *skb, s
A = ntohl(*(u32 *)ptr);
continue;
}
- return 0;
+ break;
case BPF_LD|BPF_H|BPF_ABS:
k = fentry->k;
load_h:
@@ -191,7 +191,7 @@ int sk_run_filter(struct sk_buff *skb, s
A = ntohs(*(u16 *)ptr);
continue;
}
- return 0;
+ break;
case BPF_LD|BPF_B|BPF_ABS:
k = fentry->k;
load_b:
@@ -200,7 +200,7 @@ load_b:
A = *(u8 *)ptr;
continue;
}
- return 0;
+ break;
case BPF_LD|BPF_W|BPF_LEN:
A = skb->len;
continue;
--
-
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