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kernel BUG at fs/ext4/inode.c:2778!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: writeback wb_workfn (flush-7:1)
RIP: 0010:ext4_writepages+0x2e8c/0x2eb0 fs/ext4/inode.c:2777
Code: 00 00 00 e8 46 df 92 ff 84 db 75 2c e8 ad dc 92 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 18 e9 cb d4 ff ff e8 94 dc 92 ff <0f> 0b e8 8d dc 92 ff e8 64 95 2e ff eb 9d e8 81 dc 92 ff e8 58 95
RSP: 0018:ffffc90000077180 EFLAGS: 00010293
RAX: ffffffff81d1d83c RBX: 000000c41000c000 RCX: ffff88810024bb40
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900000774f0 R08: ffff88811a8fa3c7 R09: 1ffff1102351f478
R10: dffffc0000000000 R11: ffffed102351f479 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000008000000000 R15: 1ffff9200000ee5c
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f587cf64560 CR3: 000000011b372000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_writepages+0x128/0x280 mm/page-writeback.c:2380
 __writeback_single_inode+0xd5/0xa20 fs/fs-writeback.c:1470
 writeback_sb_inodes+0x8ca/0x1480 fs/fs-writeback.c:1733
 wb_writeback+0x403/0xbe0 fs/fs-writeback.c:1908
 wb_do_writeback fs/fs-writeback.c:2053 [inline]
 wb_workfn+0x3ac/0xf30 fs/fs-writeback.c:2094
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13c0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Modules linked in:
---[ end trace e85bd5fe760ff985 ]---
RIP: 0010:ext4_writepages+0x2e8c/0x2eb0 fs/ext4/inode.c:2777
Code: 00 00 00 e8 46 df 92 ff 84 db 75 2c e8 ad dc 92 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 7c 24 18 e9 cb d4 ff ff e8 94 dc 92 ff <0f> 0b e8 8d dc 92 ff e8 64 95 2e ff eb 9d e8 81 dc 92 ff e8 58 95
RSP: 0018:ffffc90000077180 EFLAGS: 00010293
RAX: ffffffff81d1d83c RBX: 000000c41000c000 RCX: ffff88810024bb40
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900000774f0 R08: ffff88811a8fa3c7 R09: 1ffff1102351f478
R10: dffffc0000000000 R11: ffffed102351f479 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000008000000000 R15: 1ffff9200000ee5c
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f51eff8 CR3: 000000010d4d6000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400