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kernel BUG at fs/ext4/inode.c:2462!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 9467 Comm: kworker/u4:12 Not tainted 4.4.162+ #113
netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'.
Workqueue: writeback wb_workfn (flush-8:0)
task: ffff8801d373df00 task.stack: ffff880000100000
RIP: 0010:[<ffffffff8163feb0>]  [<ffffffff8163feb0>] mpage_prepare_extent_to_map+0x670/0x8e0 fs/ext4/inode.c:2462
RSP: 0018:ffff880000107330  EFLAGS: 00010293
RAX: ffff8801d373df00 RBX: ffffea0007265f80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8163feb0 RDI: ffffea0007265f90
RBP: ffff8800001074e8 R08: ffff8801d373e7c8 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: dffffc0000000000 R15: ffff880000107630
FS:  0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 00000001d0ba3000 CR4: 00000000001606b0
Stack:
 1ffff10000020e74 ffff8800001073c0 ffff880000107638 ffff880000107640
 0000000000000002 0007ffffffffffff ffff8801cec80bd0 000000090000000c
 0000000000001c00 ffff880000107400 ffff880000107648 ffffed0000020ec7
Call Trace:
 [<ffffffff8164f10c>] ext4_writepages+0xd4c/0x2c20 fs/ext4/inode.c:2617
 [<ffffffff813d741f>] do_writepages+0xef/0x1d0 mm/page-writeback.c:2334
 [<ffffffff8151fed1>] __writeback_single_inode+0x101/0x1340 fs/fs-writeback.c:1285
 [<ffffffff815215bb>] writeback_sb_inodes+0x4ab/0xee0 fs/fs-writeback.c:1548
 [<ffffffff815220eb>] __writeback_inodes_wb+0xfb/0x1e0 fs/fs-writeback.c:1617
 [<ffffffff815226f9>] wb_writeback+0x529/0xd00 fs/fs-writeback.c:1726
 [<ffffffff81524c53>] wb_do_writeback fs/fs-writeback.c:1858 [inline]
 [<ffffffff81524c53>] wb_workfn+0x243/0x1010 fs/fs-writeback.c:1894
 [<ffffffff81122a94>] process_one_work+0x824/0x1670 kernel/workqueue.c:2064
 [<ffffffff811239b9>] worker_thread+0xd9/0x1060 kernel/workqueue.c:2196
 [<ffffffff81133e18>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff827063c5>] 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  [<ffffffff8163feb0>] mpage_prepare_extent_to_map+0x670/0x8e0 fs/ext4/inode.c:2462
 RSP <ffff880000107330>
---[ end trace 81c23db8838fb37e ]---