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WARNING: CPU: 0 PID: 26943 at fs/ext4/ext4_jbd2.c:271 __ext4_handle_dirty_metadata+0x291/0x480 fs/ext4/ext4_jbd2.c:271
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 26943 Comm: syz-executor0 Not tainted 4.14.71+ #8
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x11b lib/dump_stack.c:53
 panic+0x1bf/0x3a4 kernel/panic.c:181
 __warn.cold.7+0x148/0x185 kernel/panic.c:542
 report_bug+0x1f7/0x26c lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 do_error_trap+0x1ba/0x2c0 arch/x86/kernel/traps.c:295
 invalid_op+0x18/0x40 arch/x86/entry/entry_64.S:944
RIP: 0010:__ext4_handle_dirty_metadata+0x291/0x480 fs/ext4/ext4_jbd2.c:271
RSP: 0018:ffff8801c76d7670 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffff88019731de70 RCX: 000000000000082b
RDX: ffffffff816f0981 RSI: ffffc900024f9000 RDI: ffff880193d4dc80
RBP: ffff880193d4dc80 R08: ffff88019731de70 R09: ffffffff8d93c6f0
R10: ffffffff8d95ad10 R11: ffff8801b676efff R12: 00000000ffffff8b
R13: ffff880193d4dc9c R14: 0000000000000000 R15: 0000000000000563
 write_end_fn+0x68/0x90 fs/ext4/inode.c:1379
 ext4_walk_page_buffers+0x9e/0x1a0 fs/ext4/inode.c:1097
 ext4_journalled_write_end+0x2e1/0x1110 fs/ext4/inode.c:1533
 generic_perform_write+0x294/0x430 mm/filemap.c:3048
 __generic_file_write_iter+0x345/0x540 mm/filemap.c:3162
 ext4_file_write_iter+0x4f6/0xe20 fs/ext4/file.c:264
 call_write_iter include/linux/fs.h:1782 [inline]
 do_iter_readv_writev+0x3a4/0x560 fs/read_write.c:678
 do_iter_write+0x156/0x530 fs/read_write.c:957
 vfs_writev+0x146/0x2d0 fs/read_write.c:1002
 do_writev+0xcc/0x240 fs/read_write.c:1037
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457679
RSP: 002b:00007f27f1b72c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f27f1b736d4 RCX: 0000000000457679
RDX: 0000000000000008 RSI: 0000000020004fc0 RDI: 0000000000000005
RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d8da8 R14: 00000000004c30f7 R15: 0000000000000003
Kernel Offset: 0xc200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..