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kernel BUG at fs/ext4/inode.c:2648!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7 Comm: kworker/u4:0 Tainted: G        W         5.10.109-syzkaller-00693-g414e6c8e941c #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+0xc48/0xc60 fs/ext4/inode.c:2648
Code: 48 8d 8c 24 c0 00 00 00 80 e1 07 38 c1 0f 8c 96 fe ff ff 48 8d bc 24 c0 00 00 00 e8 b2 e2 c9 ff e9 84 fe ff ff e8 28 1d 90 ff <0f> 0b e8 21 1d 90 ff 0f 0b e8 0a 9b b3 02 66 2e 0f 1f 84 00 00 00
RSP: 0018:ffffc90000076ee0 EFLAGS: 00010293
RAX: ffffffff81dc97d8 RBX: 0000000000000000 RCX: ffff8881002393c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900000770b0 R08: ffffffff81dc9434 R09: fffff940009fdbe9
R10: fffff940009fdbe9 R11: 1ffffd40009fdbe8 R12: dffffc0000000000
R13: ffffea0004fedf40 R14: 0000000000000000 R15: 0000000000002400
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f079852d090 CR3: 000000011950c000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_writepages+0xcc1/0x36f0 fs/ext4/inode.c:2777
 do_writepages+0x13a/0x280 mm/page-writeback.c:2358
 __writeback_single_inode+0xb8/0x6e0 fs/fs-writeback.c:1467
 writeback_sb_inodes+0xa24/0x18a0 fs/fs-writeback.c:1729
 __writeback_inodes_wb fs/fs-writeback.c:1798 [inline]
 wb_writeback+0x4f4/0xc20 fs/fs-writeback.c:1904
 wb_check_start_all fs/fs-writeback.c:2028 [inline]
 wb_do_writeback+0x71d/0xbd0 fs/fs-writeback.c:2054
 wb_workfn+0xf8/0x3f0 fs/fs-writeback.c:2088
 process_one_work+0x726/0xc10 kernel/workqueue.c:2296
 worker_thread+0xb27/0x1550 kernel/workqueue.c:2442
 kthread+0x349/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Modules linked in:
---[ end trace 41f23c36f0f6cac9 ]---
RIP: 0010:mpage_prepare_extent_to_map+0xc48/0xc60 fs/ext4/inode.c:2648
Code: 48 8d 8c 24 c0 00 00 00 80 e1 07 38 c1 0f 8c 96 fe ff ff 48 8d bc 24 c0 00 00 00 e8 b2 e2 c9 ff e9 84 fe ff ff e8 28 1d 90 ff <0f> 0b e8 21 1d 90 ff 0f 0b e8 0a 9b b3 02 66 2e 0f 1f 84 00 00 00
RSP: 0018:ffffc90000076ee0 EFLAGS: 00010293
RAX: ffffffff81dc97d8 RBX: 0000000000000000 RCX: ffff8881002393c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900000770b0 R08: ffffffff81dc9434 R09: fffff940009fdbe9
R10: fffff940009fdbe9 R11: 1ffffd40009fdbe8 R12: dffffc0000000000
R13: ffffea0004fedf40 R14: 0000000000000000 R15: 0000000000002400
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555558d3b38 CR3: 000000011893b000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400