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WARNING: CPU: 2 PID: 8963 at fs/buffer.c:1128 mark_buffer_dirty+0x4fa/0x690 fs/buffer.c:1128
Kernel panic - not syncing: panic_on_warn set ...
CPU: 2 PID: 8963 Comm: syz-fuzzer Not tainted 5.6.0-rc4-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
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:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [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:1128
Code: 03 80 3c 02 00 0f 85 99 01 00 00 48 8b 3b be 04 00 00 00 e8 08 e5 fc ff 5b 5d 41 5c 41 5d 41 5e e9 8b d6 a9 ff e8 86 d6 a9 ff <0f> 0b e9 4f fb ff ff e8 7a d6 a9 ff 0f 0b e9 73 fb ff ff e8 6e d6
RSP: 0018:ffffc90001cf7aa8 EFLAGS: 00010293
RAX: ffff88801d9ccf00 RBX: ffff888024b8edc8 RCX: ffffffff81c83827
RDX: 0000000000000000 RSI: ffffffff81c83cda RDI: 0000000000000001
RBP: 0000000000000000 R08: ffff88801d9ccf00 R09: ffffed1004971dba
R10: ffffed1004971db9 R11: ffff888024b8edcf R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888023296000
 __ext4_handle_dirty_metadata+0x41d/0x7a0 fs/ext4/ext4_jbd2.c:338
 __ext4_new_inode+0x2349/0x57e0 fs/ext4/ialloc.c:1072
 ext4_mkdir+0x38d/0xdc0 fs/ext4/namei.c:2790
 vfs_mkdir+0x419/0x670 fs/namei.c:3889
 do_mkdirat+0x21e/0x280 fs/namei.c:3912
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4afb40
Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
RSP: 002b:000000c0002e5880 EFLAGS: 00000206 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 000000c00002ea00 RCX: 00000000004afb40
RDX: 00000000000001c0 RSI: 000000c003cc8240 RDI: ffffffffffffff9c
RBP: 000000c0002e58d8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: ffffffffffffffff
R13: 0000000000000013 R14: 0000000000000012 R15: 0000000000000100
Kernel Offset: disabled
Rebooting in 86400 seconds..