------------[ cut here ]------------ kernel BUG at fs/ext4/inode.c:2648! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 24380 Comm: kworker/u4:5 Tainted: G W 5.10.109-syzkaller-00693-g414e6c8e941c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-8:0) RIP: 0010:mpage_prepare_extent_to_map+0xbe9/0xc00 fs/ext4/inode.c:2648 Code: e8 6c d8 c9 ff e9 80 f6 ff ff 44 89 e9 80 e1 07 38 c1 0f 8c a6 fe ff ff 4c 89 ef e8 51 d8 c9 ff e9 99 fe ff ff e8 67 d2 8f ff <0f> 0b e8 60 d2 8f ff 0f 0b e8 b9 e2 b8 02 66 0f 1f 84 00 00 00 00 RSP: 0018:ffffc90007736d80 EFLAGS: 00010293 RAX: ffffffff81dd28f9 RBX: 0000000000000000 RCX: ffff8881540ba780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90007736f50 R08: ffffffff81dd2571 R09: fffff940009d9699 R10: fffff940009d9699 R11: 0000000000000000 R12: ffffea0004ecb4c0 R13: ffffc90007736e40 R14: 0000000000000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f20c175f028 CR3: 000000010c556000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_writepages+0xcbb/0x3950 fs/ext4/inode.c:2777 do_writepages+0x13a/0x280 mm/page-writeback.c:2358 __writeback_single_inode+0xb8/0x6f0 fs/fs-writeback.c:1467 writeback_sb_inodes+0x9a4/0x1910 fs/fs-writeback.c:1729 __writeback_inodes_wb fs/fs-writeback.c:1798 [inline] wb_writeback+0x4ec/0xc40 fs/fs-writeback.c:1904 wb_check_start_all fs/fs-writeback.c:2028 [inline] wb_do_writeback+0x739/0xbc0 fs/fs-writeback.c:2054 wb_workfn+0x178/0x9d0 fs/fs-writeback.c:2088 process_one_work+0x6b4/0xfb0 kernel/workqueue.c:2296 worker_thread+0xb15/0x1600 kernel/workqueue.c:2442 kthread+0x371/0x390 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Modules linked in: ---[ end trace 0f76a7baa286e9c7 ]--- RIP: 0010:mpage_prepare_extent_to_map+0xbe9/0xc00 fs/ext4/inode.c:2648 Code: e8 6c d8 c9 ff e9 80 f6 ff ff 44 89 e9 80 e1 07 38 c1 0f 8c a6 fe ff ff 4c 89 ef e8 51 d8 c9 ff e9 99 fe ff ff e8 67 d2 8f ff <0f> 0b e8 60 d2 8f ff 0f 0b e8 b9 e2 b8 02 66 0f 1f 84 00 00 00 00 RSP: 0018:ffffc90007736d80 EFLAGS: 00010293 RAX: ffffffff81dd28f9 RBX: 0000000000000000 RCX: ffff8881540ba780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90007736f50 R08: ffffffff81dd2571 R09: fffff940009d9699 R10: fffff940009d9699 R11: 0000000000000000 R12: ffffea0004ecb4c0 R13: ffffc90007736e40 R14: 0000000000000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f20c175f028 CR3: 0000000107b97000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400