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kernel BUG at fs/ext4/inode.c:2736!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4716 Comm: kworker/u4:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: writeback wb_workfn (flush-7:4)
RIP: 0010:ext4_writepages+0x2ded/0x2df0 fs/ext4/inode.c:2735
Code: c1 03 38 c1 0f 8c b0 fd ff ff 4c 89 e7 e8 ab f1 b1 ff e9 a3 fd ff ff e8 e1 d2 6c ff 0f 0b e8 da d2 6c ff 0f 0b e8 d3 d2 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:ffffc9000309f080 EFLAGS: 00010293
RAX: ffffffff820c633d RBX: 000000c410000000 RCX: ffff888023003b80
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000309f3d0 R08: ffff888067f9322f R09: 1ffff1100cff2645
R10: dffffc0000000000 R11: ffffed100cff2646 R12: 1ffff92000613ee6
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff88807df2e000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000142 CR3: 000000002491a000 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 044ef2ae0e518833 ]---
RIP: 0010:ext4_writepages+0x2ded/0x2df0 fs/ext4/inode.c:2735
Code: c1 03 38 c1 0f 8c b0 fd ff ff 4c 89 e7 e8 ab f1 b1 ff e9 a3 fd ff ff e8 e1 d2 6c ff 0f 0b e8 da d2 6c ff 0f 0b e8 d3 d2 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:ffffc9000309f080 EFLAGS: 00010293
RAX: ffffffff820c633d RBX: 000000c410000000 RCX: ffff888023003b80
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000309f3d0 R08: ffff888067f9322f R09: 1ffff1100cff2645
R10: dffffc0000000000 R11: ffffed100cff2646 R12: 1ffff92000613ee6
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff88807df2e000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd35bb77440 CR3: 0000000076ff0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400