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Hello,

Hit this bug while fuzzing in a qemu virtual machine as the root user.

Kernel is v3.10-rc5-0-g317ddd2.

Tommi

[575180.874750] type=1401 audit(1371378748.322:7750): SELinux:
unrecognized netlink message type=0 for sclass=36
[575180.874750]
[575191.358143] ------------[ cut here ]------------
[575191.358498] kernel BUG at /build/linux/net/core/skbuff.c:1065!
[575191.358498] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
[575191.358498] CPU: 0 PID: 28554 Comm: trinity-child33 Not tainted
3.10.0-rc5 #1
[575191.358498] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[575191.358498] task: ffff880005f0c7c0 ti: ffff88002cec6000 task.ti:
ffff88002cec6000
[575191.358498] RIP: 0010:[<ffffffff81eb602b>]  [<ffffffff81eb602b>]
pskb_expand_head+0x3b/0x290
[575191.358498] RSP: 0018:ffff88002cec79f0  EFLAGS: 00010202
[575191.358498] RAX: 0000000000000002 RBX: ffff880010e7cd80 RCX:
0000000000000020
[575191.358498] RDX: 000000000000003c RSI: 0000000000000000 RDI:
ffff880010e7cd80
[575191.358498] RBP: ffff88002cec7a28 R08: 0000000000000001 R09:
0000000000000000
[575191.358498] R10: 0000000000000000 R11: 0000000000000000 R12:
000000000000002b
[575191.358498] R13: 0000000000000000 R14: 0000000000000011 R15:
0000000040014b89
[575191.358498] FS:  00007f3b21cd6700(0000) GS:ffff8800bf600000(0000)
knlGS:0000000000000000
[575191.358498] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[575191.358498] CR2: 00000000009fb000 CR3: 000000001a873000 CR4:
00000000000006f0
[575191.358498] DR0: 0000000002592d30 DR1: 0000000000000000 DR2:
0000000000000000
[575191.358498] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000600
[575191.358498] Stack:
[575191.358498]  ffff880090cbd668 0000000000000000 ffff880010e7cd80
000000000000002b
[575191.358498]  0000000000000000 0000000000000011 0000000040014b89
ffff88002cec7a50
[575191.358498]  ffffffff81eb6fc3 ffff88002cec7a70 0000000000000011
ffff8800b952d498
[575191.358498] Call Trace:
[575191.358498]  [<ffffffff81eb6fc3>] skb_pad+0xa3/0x150
[575191.358498]  [<ffffffff81884c48>] e1000_xmit_frame+0x78/0xfc0
[575191.358498]  [<ffffffff81ec1830>] ? dev_queue_xmit_nit+0x360/0x390
[575191.358498]  [<ffffffff81ec14d0>] ? get_rps_cpu+0x4a0/0x4a0
[575191.358498]  [<ffffffff81ec581c>] dev_hard_start_xmit+0x2ec/0x720
[575191.358498]  [<ffffffff81ef4d10>] sch_direct_xmit+0x80/0x290
[575191.358498]  [<ffffffff81ec6104>] dev_queue_xmit+0x4b4/0x8e0
[575191.358498]  [<ffffffff81ec5c50>] ? dev_hard_start_xmit+0x720/0x720
[575191.358498]  [<ffffffff81eefc3f>] llc_sap_action_send_test_c+0x7f/0x90
[575191.358498]  [<ffffffff81eef270>] llc_sap_state_process+0xd0/0x160
[575191.358498]  [<ffffffff81eef424>] llc_build_and_send_test_pkt+0x44/0x50
[575191.358498]  [<ffffffff81ef1b47>] llc_ui_sendmsg+0x1e7/0x490
[575191.358498]  [<ffffffff81eac5d1>] sock_sendmsg+0xa1/0xd0
[575191.358498]  [<ffffffff8109a838>] ? __do_page_fault+0x288/0x530
[575191.358498]  [<ffffffff81eacaac>] SYSC_sendto+0x11c/0x160
[575191.358498]  [<ffffffff822a2247>] ? _raw_spin_unlock_irq+0x27/0x50
[575191.358498]  [<ffffffff8111870c>] ? do_setitimer+0x27c/0x330
[575191.358498]  [<ffffffff81172e46>] ? trace_hardirqs_on_caller+0x16/0x220
[575191.358498]  [<ffffffff814d791e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[575191.358498]  [<ffffffff81eada69>] SyS_sendto+0x9/0x10
[575191.358498]  [<ffffffff822a38e9>] system_call_fastpath+0x16/0x1b
[575191.358498] Code: 48 89 fb 48 83 ec 10 8b 87 d4 00 00 00 01 f0 01
c2 85 f6 79 0b 0f 0b 66 0f 1f 84 00 00 00 00 00 8b 87 ec 00 00 00 83
f8 01 74 05 <0f> 0b 0f 1f 00 83 c2 3f 41 89 cf 83 e2 c0 f6 87 aa 00 00
00 04
[575191.358498] RIP  [<ffffffff81eb602b>] pskb_expand_head+0x3b/0x290
[575191.358498]  RSP <ffff88002cec79f0>
[575191.518696] ---[ end trace 866084dcc0c2aa3e ]---
[575191.522588] Kernel panic - not syncing: Fatal exception in interrupt
[575191.523574] drm_kms_helper: panic occurred, switching back to text console
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