------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2810! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 2967 Comm: kworker/u8:10 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: writeback wb_workfn (flush-7:9) RIP: 0010:ext4_do_writepages+0x44fe/0x4500 fs/ext4/inode.c:2809 Code: c6 80 1b 7f 8b e8 42 64 ad fe 90 0f 0b e8 9a 13 47 ff 4c 89 f7 48 c7 c6 60 1f 7f 8b e8 2b 64 ad fe 90 0f 0b e8 83 13 47 ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 RSP: 0000:ffffc9000b676ce0 EFLAGS: 00010293 RAX: ffffffff827aa3cd RBX: 000000621000c000 RCX: ffff88802f851e80 RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000 RBP: ffffc9000b6770f0 R08: ffff88806a80f3d7 R09: 1ffff1100d501e7a R10: dffffc0000000000 R11: ffffed100d501e7b R12: dffffc0000000000 R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100f3c54c7 FS: 0000000000000000(0000) GS:ffff888125f32000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9aa7f57000 CR3: 000000007b4a4000 CR4: 00000000003526f0 Call Trace: ext4_writepages+0x203/0x350 fs/ext4/inode.c:3026 do_writepages+0x32e/0x550 mm/page-writeback.c:2598 __writeback_single_inode+0x133/0x1240 fs/fs-writeback.c:1737 writeback_sb_inodes+0x93a/0x1870 fs/fs-writeback.c:2030 wb_writeback+0x42b/0xaa0 fs/fs-writeback.c:2216 wb_do_writeback fs/fs-writeback.c:2363 [inline] wb_workfn+0x3f9/0xed0 fs/fs-writeback.c:2403 process_one_work+0x93a/0x15a0 kernel/workqueue.c:3279 process_scheduled_works kernel/workqueue.c:3362 [inline] worker_thread+0x9b0/0xee0 kernel/workqueue.c:3443 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_do_writepages+0x44fe/0x4500 fs/ext4/inode.c:2809 Code: c6 80 1b 7f 8b e8 42 64 ad fe 90 0f 0b e8 9a 13 47 ff 4c 89 f7 48 c7 c6 60 1f 7f 8b e8 2b 64 ad fe 90 0f 0b e8 83 13 47 ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 RSP: 0000:ffffc9000b676ce0 EFLAGS: 00010293 RAX: ffffffff827aa3cd RBX: 000000621000c000 RCX: ffff88802f851e80 RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000 RBP: ffffc9000b6770f0 R08: ffff88806a80f3d7 R09: 1ffff1100d501e7a R10: dffffc0000000000 R11: ffffed100d501e7b R12: dffffc0000000000 R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100f3c54c7 FS: 0000000000000000(0000) GS:ffff888125f32000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9ab1572a60 CR3: 0000000033376000 CR4: 00000000003526f0