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kernel BUG at fs/ext4/inode.c:2648!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 657 Comm: kworker/u4:4 Tainted: G        W         5.10.107-syzkaller-00620-g9a559b886861 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:mpage_prepare_extent_to_map+0xbe9/0xc00 fs/ext4/inode.c:2648
Code: e8 6c d8 c9 ff e9 80 f6 ff ff 44 89 e9 80 e1 07 38 c1 0f 8c a6 fe ff ff 4c 89 ef e8 51 d8 c9 ff e9 99 fe ff ff e8 87 d2 8f ff <0f> 0b e8 80 d2 8f ff 0f 0b e8 f9 d7 b8 02 66 0f 1f 84 00 00 00 00
RSP: 0018:ffffc900064aed80 EFLAGS: 00010293
RAX: ffffffff81dd23a9 RBX: 0000000000000000 RCX: ffff888147084f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900064aef50 R08: ffffffff81dd2021 R09: fffff940009a2621
R10: fffff940009a2621 R11: 0000000000000000 R12: ffffea0004d13100
R13: ffffc900064aee40 R14: 00000000000000d8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f821a5fdd38 CR3: 000000010c4e4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_writepages+0xcbb/0x3950 fs/ext4/inode.c:2777
 do_writepages+0x13a/0x280 mm/page-writeback.c:2358
 __writeback_single_inode+0xb8/0x6f0 fs/fs-writeback.c:1467
 writeback_sb_inodes+0x9a4/0x1910 fs/fs-writeback.c:1729
 __writeback_inodes_wb fs/fs-writeback.c:1798 [inline]
 wb_writeback+0x4ec/0xc40 fs/fs-writeback.c:1904
 wb_check_start_all fs/fs-writeback.c:2028 [inline]
 wb_do_writeback+0x739/0xbc0 fs/fs-writeback.c:2054
 wb_workfn+0x178/0x9d0 fs/fs-writeback.c:2088
 process_one_work+0x6b4/0xfb0 kernel/workqueue.c:2296
 worker_thread+0xb15/0x1600 kernel/workqueue.c:2442
 kthread+0x371/0x390 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Modules linked in:
---[ end trace fa48a260b6ce8212 ]---
RIP: 0010:mpage_prepare_extent_to_map+0xbe9/0xc00 fs/ext4/inode.c:2648
Code: e8 6c d8 c9 ff e9 80 f6 ff ff 44 89 e9 80 e1 07 38 c1 0f 8c a6 fe ff ff 4c 89 ef e8 51 d8 c9 ff e9 99 fe ff ff e8 87 d2 8f ff <0f> 0b e8 80 d2 8f ff 0f 0b e8 f9 d7 b8 02 66 0f 1f 84 00 00 00 00
RSP: 0018:ffffc900064aed80 EFLAGS: 00010293
RAX: ffffffff81dd23a9 RBX: 0000000000000000 RCX: ffff888147084f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900064aef50 R08: ffffffff81dd2021 R09: fffff940009a2621
R10: fffff940009a2621 R11: 0000000000000000 R12: ffffea0004d13100
R13: ffffc900064aee40 R14: 00000000000000d8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f821a5fdd38 CR3: 000000010c4e4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400