------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2734!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 155 Comm: kworker/u4:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:ext4_writepages+0x2ded/0x2df0 fs/ext4/inode.c:2733
Code: c1 03 38 c1 0f 8c b0 fd ff ff 4c 89 e7 e8 0b f6 b1 ff e9 a3 fd ff ff e8 b1 ea 6c ff 0f 0b e8 aa ea 6c ff 0f 0b e8 a3 ea 6c ff <0f> 0b 90 41 57 41 56 53 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8
RSP: 0018:ffffc90002017080 EFLAGS: 00010293
RAX: ffffffff820c366d RBX: 000000c41000c000 RCX: ffff88801db38000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900020173d0 R08: ffff88806e815a0f R09: 1ffff1100dd02b41
R10: dffffc0000000000 R11: ffffed100dd02b42 R12: 1ffff92000402ee6
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff888077e6e000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd20097eb8 CR3: 000000007f01d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x476/0x6e0 mm/page-writeback.c:2386
 __writeback_single_inode+0x153/0xda0 fs/fs-writeback.c:1657
 writeback_sb_inodes+0xa4e/0x1680 fs/fs-writeback.c:1940
 wb_writeback+0x45d/0xbe0 fs/fs-writeback.c:2114
 wb_do_writeback fs/fs-writeback.c:2257 [inline]
 wb_workfn+0x43a/0xf20 fs/fs-writeback.c:2298
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace 371c4c6e25714c2d ]---
RIP: 0010:ext4_writepages+0x2ded/0x2df0 fs/ext4/inode.c:2733
Code: c1 03 38 c1 0f 8c b0 fd ff ff 4c 89 e7 e8 0b f6 b1 ff e9 a3 fd ff ff e8 b1 ea 6c ff 0f 0b e8 aa ea 6c ff 0f 0b e8 a3 ea 6c ff <0f> 0b 90 41 57 41 56 53 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8
RSP: 0018:ffffc90002017080 EFLAGS: 00010293
RAX: ffffffff820c366d RBX: 000000c41000c000 RCX: ffff88801db38000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900020173d0 R08: ffff88806e815a0f R09: 1ffff1100dd02b41
R10: dffffc0000000000 R11: ffffed100dd02b42 R12: 1ffff92000402ee6
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff888077e6e000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055fbed29f950 CR3: 000000002b3ee000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400