kernel panic at nf_nat_setup_info.
Issue
- Kernel crashes with following panic message
BUG: unable to handle kernel NULL pointer dereference at 000000000000003e
IP: [<ffffffffa0281f79>] nf_nat_setup_info+0x5d9/0x740 [nf_nat]
PGD 2580c8067 PUD 27dd79067 PMD 1851c5067 PTE 0
Oops: 0000 [#1] SMP
last sysfs file: /sys/devices/mpdx/mpdh0/host6/target6:0:0/6:0:0:0/model
CPU 0
..
Pid: 0, comm: swapper Tainted: P ---------------- 2.6.32-131.0.15.el6.x86_64 #1 PRIMERGY RX300 S6
RIP: 0010:[<ffffffffa0281f79>] [<ffffffffa0281f79>] nf_nat_setup_info+0x5d9/0x740 [nf_nat]
..
Process swapper (pid: 0, threadinfo ffffffff81a00000, task ffffffff81a2d020)
..
Call Trace:
<IRQ>
[<ffffffffa028e1bb>] alloc_null_binding+0x5b/0xa0 [iptable_nat]
[<ffffffffa028e56f>] nf_nat_fn+0x1bf/0x260 [iptable_nat]
[<ffffffff8144782c>] nf_iterate+0x6c/0xb0
[<ffffffff814524a0>] ? ip_local_deliver_finish+0x0/0x2d0
[<ffffffff814478e4>] nf_hook_slow+0x74/0x100
[<ffffffff814524a0>] ? ip_local_deliver_finish+0x0/0x2d0
[<ffffffff814527ca>] ip_local_deliver+0x5a/0xa0
[<ffffffff81451ccd>] ip_rcv_finish+0x12d/0x440
[<ffffffff81452255>] ip_rcv+0x275/0x350
[<ffffffff8141dd6b>] __netif_receive_skb+0x39b/0x6b0
[<ffffffff81420048>] netif_receive_skb+0x58/0x60
[<ffffffff81420150>] napi_skb_finish+0x50/0x70
[<ffffffff81422489>] napi_gro_receive+0x39/0x50
[<ffffffffa01ac1bb>] e1000_receive_skb+0x5b/0x90 [e1000e]
[<ffffffffa01af638>] e1000_clean_rx_irq+0x2a8/0x520 [e1000e]
[<ffffffffa01adcbe>] e1000_clean+0x7e/0x2b0 [e1000e]
[<ffffffff814225a3>] net_rx_action+0x103/0x2f0
[<ffffffff8106f717>] __do_softirq+0xb7/0x1e0
[<ffffffff810d69d6>] ? handle_IRQ_event+0xf6/0x170
[<ffffffff8100c2cc>] call_softirq+0x1c/0x30
[<ffffffff8100df05>] do_softirq+0x65/0xa0
[<ffffffff8106f505>] irq_exit+0x85/0x90
[<ffffffff814e3505>] do_IRQ+0x75/0xf0
[<ffffffff8100bad3>] ret_from_intr+0x0/0x11
<EOI>
[<ffffffff812bb86e>] ? intel_idle+0xde/0x170
[<ffffffff812bb851>] ? intel_idle+0xc1/0x170
[<ffffffff813eccb7>] cpuidle_idle_call+0xa7/0x140
[<ffffffff81009e96>] cpu_idle+0xb6/0x110
[<ffffffff814c376a>] rest_init+0x7a/0x80
[<ffffffff81bbdf28>] start_kernel+0x41d/0x429
[<ffffffff81bbd33a>] x86_64_start_reservations+0x125/0x129
[<ffffffff81bbd438>] x86_64_start_kernel+0xfa/0x109
Environment
- Red Hat Enterprise Linux 6
- kernel version earlier than fixed versions
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