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WARNING: CPU: 0 PID: 852 at fs/buffer.c:1122 mark_buffer_dirty+0x4fa/0x690 fs/buffer.c:1122
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 852 Comm: kworker/u17:7 Not tainted 5.6.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:175 [inline]
 fixup_bug arch/x86/kernel/traps.c:170 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:mark_buffer_dirty+0x4fa/0x690 fs/buffer.c:1122
Code: 03 80 3c 02 00 0f 85 99 01 00 00 48 8b 3b be 04 00 00 00 e8 d8 e2 fc ff 5b 5d 41 5c 41 5d 41 5e e9 db 6d a9 ff e8 d6 6d a9 ff <0f> 0b e9 4f fb ff ff e8 ca 6d a9 ff 0f 0b e9 73 fb ff ff e8 be 6d
RSP: 0018:ffffc90002a56ff0 EFLAGS: 00010293
RAX: ffff888028425dc0 RBX: ffff88802404dd98 RCX: ffffffff81c98197
RDX: 0000000000000000 RSI: ffffffff81c9864a RDI: 0000000000000001
RBP: 0000000000000000 R08: ffff888028425dc0 R09: ffffed1004809bb4
R10: ffffed1004809bb3 R11: ffff88802404dd9f R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880270c5bc0 R15: ffff88801db0457c
 __ext4_handle_dirty_metadata+0x41d/0x7a0 fs/ext4/ext4_jbd2.c:338
 ext4_mb_mark_diskspace_used+0x943/0x10e0 fs/ext4/mballoc.c:3048
 ext4_mb_new_blocks+0xb25/0x3940 fs/ext4/mballoc.c:4579
 ext4_ext_map_blocks+0x221c/0x37d0 fs/ext4/extents.c:4440
 ext4_map_blocks+0x4cb/0x1650 fs/ext4/inode.c:622
 mpage_map_one_extent fs/ext4/inode.c:2365 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2418 [inline]
 ext4_writepages+0x19e9/0x30c0 fs/ext4/inode.c:2772
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
 __writeback_single_inode+0x12a/0x1410 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdd0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x910/0xd90 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xb50/0x11c0 fs/fs-writeback.c:2078
 process_one_work+0x965/0x16a0 kernel/workqueue.c:2266
 worker_thread+0x96/0xe20 kernel/workqueue.c:2412
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..