Messages in this thread | | | Date | Wed, 8 Feb 2017 23:10:06 +0100 | From | Florian Westphal <> | Subject | Re: net/ipv4: warning in nf_nat_ipv4_fn |
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Andrey Konovalov <andreyknvl@google.com> wrote: > Hi, > > I've got the following error report while fuzzing the kernel with syzkaller. > > On commit 926af6273fc683cd98cd0ce7bf0d04a02eed6742. > > A reproducer and .config are attached. > > WARNING: CPU: 2 PID: 26582 at > net/ipv4/netfilter/nf_nat_l3proto_ipv4.c:261 > nf_nat_ipv4_fn+0x7f2/0xa50 > net/ipv4/netfilter/nf_nat_l3proto_ipv4.c:261 > Kernel panic - not syncing: panic_on_warn set ...
Thats this assert: /* We never see fragments: conntrack defrags on pre-routing * and local-out, and nf_nat_out protects post-routing. */ NF_CT_ASSERT(!ip_is_fragment(ip_hdr(skb)));
... and its wrong. I will send a patch to remove it.
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