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kernel BUG at fs/ext4/inode.c:2749!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 45 Comm: kworker/u4:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
Workqueue: writeback wb_workfn (flush-7:7)
RIP: 0010:ext4_writepages+0x3080/0x30a0 fs/ext4/inode.c:2748
Code: dc 8d ff 84 db 75 31 e8 ce d9 8d ff 49 bd 00 00 00 00 00 fc ff df 4c 8b 64 24 20 48 8b 5c 24 40 e9 99 f7 ff ff e8 b0 d9 8d ff <0f> 0b e8 a9 d9 8d ff e8 50 9c 24 ff eb 98 e8 9d d9 8d ff e8 44 9c
RSP: 0000:ffffc900002ef120 EFLAGS: 00010293
RAX: ffffffff81dbdcf0 RBX: 000000c410000000 RCX: ffff8881045be2c0
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900002ef490 R08: ffff888131f1c677 R09: 1ffff110263e38ce
R10: dffffc0000000000 R11: ffffed10263e38cf R12: ffff88810c118000
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff888131f1c670
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb547aab580 CR3: 0000000129f4f000 CR4: 00000000003506b0
Call Trace:
 <TASK>
 do_writepages+0x476/0x6d0 mm/page-writeback.c:2388
 __writeback_single_inode+0xd9/0x9e0 fs/fs-writeback.c:1657
 writeback_sb_inodes+0x9f3/0x1610 fs/fs-writeback.c:1940
 wb_writeback+0x3eb/0x990 fs/fs-writeback.c:2116
 wb_do_writeback fs/fs-writeback.c:2263 [inline]
 wb_workfn+0x3ac/0xf30 fs/fs-writeback.c:2304
 process_one_work+0x6c8/0xbb0 kernel/workqueue.c:2328
 worker_thread+0xaa0/0x1250 kernel/workqueue.c:2475
 kthread+0x3f5/0x4f0 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace 170277f4a6a0ef99 ]---
RIP: 0010:ext4_writepages+0x3080/0x30a0 fs/ext4/inode.c:2748
Code: dc 8d ff 84 db 75 31 e8 ce d9 8d ff 49 bd 00 00 00 00 00 fc ff df 4c 8b 64 24 20 48 8b 5c 24 40 e9 99 f7 ff ff e8 b0 d9 8d ff <0f> 0b e8 a9 d9 8d ff e8 50 9c 24 ff eb 98 e8 9d d9 8d ff e8 44 9c
RSP: 0000:ffffc900002ef120 EFLAGS: 00010293
RAX: ffffffff81dbdcf0 RBX: 000000c410000000 RCX: ffff8881045be2c0
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900002ef490 R08: ffff888131f1c677 R09: 1ffff110263e38ce
R10: dffffc0000000000 R11: ffffed10263e38cf R12: ffff88810c118000
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff888131f1c670
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb547aab580 CR3: 0000000147b54000 CR4: 00000000003506b0