Comment 13 for bug 1592597

There also was some case of a different panic which looked like below:

[ 16.191583] BUG: unable to handle kernel NULL pointer dereference at 0000000000000148
[ 16.201096] IP: [<ffffffff810a69f7>] check_preempt_wakeup+0x137/0x270
[ 16.208349] PGD 0
[ 16.211201] Oops: 0000 [#1] SMP
[ 16.214877] Modules linked in: btrfs xor raid6_pq libcrc32c crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd igb ixgbe i2c_algo_bit ahci libahci dca ptp pps_core mdio megaraid_sas wmi
[ 16.238385] CPU: 0 PID: 1 Comm: init Not tainted 3.13.0-88-generic #135-Ubuntu
[ 16.246509] Hardware name: Dell Inc. PowerEdge R630/0CNCJW, BIOS 1.0.4 08/28/2014
[ 16.254918] task: ffff883fd26b8000 ti: ffff881fd2aac000 task.ti: ffff881fd2aac000
[ 16.263327] RIP: 0010:[<ffffffff810a69f7>] [<ffffffff810a69f7>] check_preempt_wakeup+0x137/0x270
[ 16.273317] RSP: 0018:ffff881fd2aad9e8 EFLAGS: 00010087
[ 16.279280] RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.287281] RDX: 0000000000000002 RSI: ffff881fce08b000 RDI: ffff881fff413200
[ 16.295283] RBP: ffff881fd2aada20 R08: 0000000000000000 R09: 0000000000000000
[ 16.303284] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 16.311285] R13: ffff883fd26b8000 R14: ffff881fff413180 R15: 0000000000000001
[ 16.319292] FS: 00007fce8b255840(0000) GS:ffff881fff400000(0000) knlGS:0000000000000000
[ 16.328379] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.334827] CR2: 0000000000000148 CR3: 0000001fd0fb7000 CR4: 00000000001407f0
[ 16.342833] Stack:
[ 16.345099] ffff881fd2aada10 ffffffff8109fde5 ffff881fff413180 ffff881fce08b000
[ 16.353487] ffff881fff413180 0000000000000001 0000000000000000 ffff881fd2aada38
[ 16.361884] ffffffff8109aa25 ffff881fce08b000 ffff881fd2aada60 ffffffff8109aa59
[ 16.370276] Call Trace:
[ 16.373045] [<ffffffff8109fde5>] ? sched_clock_cpu+0xb5/0x100
[ 16.379606] [<ffffffff8109aa25>] check_preempt_curr+0x85/0xa0
[ 16.386154] [<ffffffff8109aa59>] ttwu_do_wakeup+0x19/0xf0
[ 16.392317] [<ffffffff8109abdd>] ttwu_do_activate.constprop.75+0x5d/0x70
[ 16.399935] [<ffffffff8109d172>] try_to_wake_up+0x1d2/0x2c0
[ 16.406287] [<ffffffff8109d2b2>] default_wake_function+0x12/0x20
[ 16.413135] [<ffffffff811d5386>] pollwake+0x66/0x70
[ 16.418715] [<ffffffff8109d2a0>] ? wake_up_state+0x20/0x20
[ 16.424982] [<ffffffff810ad398>] __wake_up_common+0x58/0x90
[ 16.431335] [<ffffffff810ad945>] __wake_up_sync_key+0x45/0x60
[ 16.437890] [<ffffffff816165fa>] sock_def_readable+0x3a/0x70
[ 16.444346] [<ffffffff816c42e1>] unix_stream_sendmsg+0x1f1/0x400
[ 16.451189] [<ffffffff816139ab>] sock_sendmsg+0x8b/0xc0
[ 16.457163] [<ffffffff811524f3>] ? unlock_page+0x23/0x30
[ 16.463237] [<ffffffff8117afd2>] ? do_wp_page+0x392/0x7b0
[ 16.469399] [<ffffffff81613db9>] ___sys_sendmsg+0x389/0x3a0
[ 16.475763] [<ffffffff81735b44>] ? __do_page_fault+0x204/0x560
[ 16.482411] [<ffffffff811d7eec>] ? __dentry_kill+0x15c/0x1e0
[ 16.488866] [<ffffffff811d801d>] ? dput+0xad/0x180
[ 16.494358] [<ffffffff811e13e4>] ? mntput+0x24/0x40
[ 16.499942] [<ffffffff811c2cfe>] ? __fput+0x17e/0x260
[ 16.505713] [<ffffffff81614ba2>] __sys_sendmsg+0x42/0x80
[ 16.511782] [<ffffffff81614bf2>] SyS_sendmsg+0x12/0x20
[ 16.517659] [<ffffffff8173a4dd>] system_call_fastpath+0x1a/0x1f
[ 16.524396] Code: 00 00 85 ff 0f 84 37 ff ff ff 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 1f 00 48 8b 9b 40 01 00 00 4d 8b a4 24 40 01 00 00 <48> 8b bb 48 01 00 00 49 3b bc 24 48 01 00 00 75 e0 44 89 45 d0
[ 16.546779] RIP [<ffffffff810a69f7>] check_preempt_wakeup+0x137/0x270
[ 16.554113] RSP <ffff881fd2aad9e8>
[ 16.558035] CR2: 0000000000000148
[ 16.561769] ---[ end trace d66b8aa0c23f3c89 ]---