Kernel crash: oops in check_peer_redir

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Environment

Open Enterprise Server 11 SP1
SUSE Linux Enterprise Server 11 SP2
vmlinux-3.0.38-0.5-default

Situation

Kernel oops exception RIP: check_peer_redir+62
BUG: unable to handle kernel NULL pointer dereference at 000000000000002c
IP: [<ffffffff813b1bce>] check_peer_redir+0x3e/0x120

Resolution

Fix released in update channel. kernel-default-3.0.51-0.7.9.1

Cause

Data structure was not being properly protected.

Additional Information

Stack Trace:
PID: 0      TASK: ffff8804077cc640  CPU: 13  COMMAND: "kworker/0:1"
 #0 [ffff88081fcc3970] machine_kexec at ffffffff8102672e
 #1 [ffff88081fcc39c0] crash_kexec at ffffffff810a353a
 #2 [ffff88081fcc3a90] oops_end at ffffffff81442cb8
 #3 [ffff88081fcc3ab0] __bad_area_nosemaphore at ffffffff810324d5
 #4 [ffff88081fcc3b70] do_page_fault at ffffffff8144520e
 #5 [ffff88081fcc3c70] page_fault at ffffffff81441e65
    [exception RIP: check_peer_redir+62]
    RIP: ffffffff813b1bce  RSP: ffff88081fcc3d20  RFLAGS: 00010246
    RAX: 00000000a00a030a  RBX: ffff88044cfbce80  RCX: 0000000000000000
    RDX: 0000000000000000  RSI: ffff8807e8f70d40  RDI: 0000000000000000
    RBP: ffff8807e8f70d40   R8: 0000000000004168   R9: 000000000000527b
    R10: 0000000000000014  R11: ffffffff810499e0  R12: 00000000a00a030a
    R13: 0000000000000000  R14: ffff88042f4fe4e0  R15: 0000000000000000
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #6 [ffff88081fcc3d38] ipv4_dst_check at ffffffff813b37e0
 #7 [ffff88081fcc3d58] __sk_dst_check at ffffffff8137602a
 #8 [ffff88081fcc3d78] ip_queue_xmit at ffffffff813bd35a
 #9 [ffff88081fcc3db8] tcp_transmit_skb at ffffffff813d32f0
#10 [ffff88081fcc3e28] tcp_keepalive_timer at ffffffff813d6f30
#11 [ffff88081fcc3e48] call_timer_fn at ffffffff8106803b
#12 [ffff88081fcc3e78] run_timer_softirq at ffffffff81069443
#13 [ffff88081fcc3ee8] __do_softirq at ffffffff8106038f
#14 [ffff88081fcc3f48] call_softirq at ffffffff8144a6bc
#15 [ffff88081fcc3f60] do_softirq at ffffffff810043a5
#16 [ffff88081fcc3f90] smp_apic_timer_interrupt at ffffffff81020db8
#17 [ffff88081fcc3fb0] apic_timer_interrupt at ffffffff81449e73

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