| [NET][IA64] Unaligned access in sk_run_filter [message #1708] |
Mon, 20 February 2006 15:28  |
Mishin Dmitry
Messages: 112
Registered: February 2006
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Senior Member |
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Hello,
We have an issue on ia64 box. It is easy triggerable 'kernel unaligned access'
in sk_run_filter:
ptr = load_pointer(skb, k, 4, &tmp);
if (ptr != NULL) {
A = ntohl(*(u32 *)ptr); << here
continue;
}
due to 'k' is coming from userspace it can be easy triggered, e.g.:
[root@node1 ~]# tcpdump -i eth0 'ip[1:2]=0'
Could you advise how to fix this?
--
Thanks,
Dmitry.
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| Re: [NET][IA64] Unaligned access in sk_run_filter [message #1717 is a reply to message #1708] |
Mon, 20 February 2006 15:43  |
Jes Sorensen
Messages: 5
Registered: February 2006
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Junior Member |
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>>>>> "Dmitry" == Dmitry Mishin <dim@openvz.org> writes:
Dmitry> Hello, We have an issue on ia64 box. It is easy triggerable
Dmitry> 'kernel unaligned access' in sk_run_filter:
Dmitry> ptr = load_pointer(skb, k, 4, &tmp);
Dmitry> if (ptr != NULL) {
Dmitry> A = ntohl(*(u32 *)ptr); << here
Change the above line to something like this:
A = ntohl(get_unaligned((u32*)ptr));
And add an #include <asm/unaligned.h>
Cheers,
Jes
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