__dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz'
 gfs2_lm_withdraw.cold+0x1d8/0x251 fs/gfs2/util.c:73
------------[ cut here ]------------
 gfs2_meta_check_ii+0x60/0x90 fs/gfs2/util.c:202
WARNING: CPU: 0 PID: 17427 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30
 gfs2_metatype_check_i fs/gfs2/util.h:111 [inline]
 gfs2_meta_indirect_buffer+0x2dc/0x380 fs/gfs2/meta_io.c:419
Kernel panic - not syncing: panic_on_warn set ...

 gfs2_meta_inode_buffer fs/gfs2/meta_io.h:73 [inline]
 gfs2_inode_refresh+0x84/0xd40 fs/gfs2/glops.c:406
 inode_go_lock+0x1d5/0x410 fs/gfs2/glops.c:436
 do_promote+0x39f/0xc60 fs/gfs2/glock.c:362
 finish_xmote+0x3ad/0xc30 fs/gfs2/glock.c:522
 do_xmote+0x453/0x580 fs/gfs2/glock.c:590
 run_queue+0x1d3/0x4d0 fs/gfs2/glock.c:655
 gfs2_glock_nq+0x830/0x1120 fs/gfs2/glock.c:1114
 gfs2_glock_nq_init fs/gfs2/glock.h:228 [inline]
 gfs2_permission+0x1cd/0x320 fs/gfs2/inode.c:1809
 do_inode_permission fs/namei.c:384 [inline]
 __inode_permission+0x1f1/0x2f0 fs/namei.c:426
 inode_permission+0x23/0xf0 fs/namei.c:476
 may_open+0x1ab/0x2e0 fs/namei.c:2975
 do_last fs/namei.c:3424 [inline]
 path_openat+0x5bf/0x2970 fs/namei.c:3569
 do_filp_open+0x179/0x3c0 fs/namei.c:3603
 do_sys_open+0x296/0x410 fs/open.c:1081
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x4196e4
RSP: 002b:00007f6c9e99df30 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00000000004196e4
RDX: 0000000000010000 RSI: 0000000020000100 RDI: 00000000ffffff9c
RBP: 0000000020000100 R08: 0000000000000000 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000010000
R13: 0000000020000100 R14: 00007f6c9e99e000 R15: 0000000020047a20
CPU: 0 PID: 17427 Comm: syz-executor.1 Not tainted 4.14.231-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30
RSP: 0018:ffff88804eb17728 EFLAGS: 00010282
RAX: 000000000000003a RBX: ffff88804f9cca10 RCX: 0000000000000000
RDX: 0000000000033f16 RSI: ffffffff81441a30 RDI: ffffed1009d62edb
RBP: ffff88809964e140 R08: 000000000000003a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b13582a0
R13: ffff8880afdf4500 R14: ffff88804f9cca18 R15: ffff888046cb8758
 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59
 create_dir lib/kobject.c:71 [inline]
 kobject_add_internal+0x28b/0x930 lib/kobject.c:229
 kobject_add_varg lib/kobject.c:364 [inline]
 kobject_init_and_add+0xde/0x120 lib/kobject.c:436
 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652
 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1122
 gfs2_mount+0x439/0x510 fs/gfs2/ops_fstype.c:1335
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0xe53/0x2a00 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3072
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x467b1a
RSP: 002b:00007fd79d0e1fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000467b1a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fd79d0e2000
RBP: 00007fd79d0e2040 R08: 00007fd79d0e2040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fd79d0e2000 R15: 0000000020047a20
Kernel Offset: disabled
Rebooting in 86400 seconds..