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kernel BUG at fs/ext4/inode.c:2462!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 2218 Comm: kworker/u4:3 Not tainted 4.4.161+ #110
Workqueue: writeback wb_workfn (flush-8:0)
task: ffff8800baeeaf80 task.stack: ffff8801c2a48000
RIP: 0010:[<ffffffff816400d0>]  [<ffffffff816400d0>] mpage_prepare_extent_to_map+0x670/0x8e0 fs/ext4/inode.c:2462
RSP: 0018:ffff8801c2a4f390  EFLAGS: 00010293
RAX: ffff8800baeeaf80 RBX: ffffea0006ff8d00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816400d0 RDI: ffffea0006ff8d10
RBP: ffff8801c2a4f548 R08: ffff8800baeeb848 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8801c2a4f690
FS:  0000000000000000(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000149c978 CR3: 00000000aaad6000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 1ffff10038549e80 ffff8801c2a4f420 ffff8801c2a4f698 ffff8801c2a4f6a0
 00000002c2a4f438 0007ffffffffffff ffff8801ceedb3a8 000000090000000c
 7fffffffffffffff ffff8801c2a4f460 ffff8801c2a4f6a8 ffffed0038549ed3
Call Trace:
 [<ffffffff8164f32c>] ext4_writepages+0xd4c/0x2c20 fs/ext4/inode.c:2617
 [<ffffffff813d763f>] do_writepages+0xef/0x1d0 mm/page-writeback.c:2334
 [<ffffffff815200f1>] __writeback_single_inode+0x101/0x1340 fs/fs-writeback.c:1285
 [<ffffffff815217db>] writeback_sb_inodes+0x4ab/0xee0 fs/fs-writeback.c:1548
 [<ffffffff815226d1>] wb_writeback+0x2e1/0xd00 fs/fs-writeback.c:1724
 [<ffffffff81524e73>] wb_do_writeback fs/fs-writeback.c:1858 [inline]
 [<ffffffff81524e73>] wb_workfn+0x243/0x1010 fs/fs-writeback.c:1894
 [<ffffffff81122cb4>] process_one_work+0x824/0x1670 kernel/workqueue.c:2064
 [<ffffffff81123bd9>] worker_thread+0xd9/0x1060 kernel/workqueue.c:2196
 [<ffffffff81134038>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff82705f05>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510
Code: 48 89 df e8 23 45 d7 ff e9 32 ff ff ff e8 49 6e cc ff 48 89 df e8 b1 5e d7 ff e9 fa fd ff ff e8 37 6e cc ff 0f 0b e8 30 6e cc ff <0f> 0b 31 c0 89 85 b0 fe ff ff e8 21 6e cc ff 8b 85 18 ff ff ff 
RIP  [<ffffffff816400d0>] mpage_prepare_extent_to_map+0x670/0x8e0 fs/ext4/inode.c:2462
 RSP <ffff8801c2a4f390>
audit: type=1400 audit(1539478519.304:138): avc:  denied  { create } for  pid=9803 comm="syz-executor5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0
audit: type=1400 audit(1539478519.354:139): avc:  denied  { create } for  pid=9803 comm="syz-executor5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0
audit: type=1400 audit(1539478519.394:140): avc:  denied  { create } for  pid=9803 comm="syz-executor5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0
---[ end trace ab6ccae9138c90c1 ]---