Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 kobject_add_internal failed for gfs2meta with -EEXIST, don't try to register things with the same name in the same directory. sysfs_warn_dup.cold.3+0x1c/0x2b fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x184/0x1d0 fs/sysfs/dir.c:58 WARNING: CPU: 0 PID: 4525 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236 create_dir lib/kobject.c:69 [inline] kobject_add_internal+0x353/0xba0 lib/kobject.c:228 Kernel panic - not syncing: panic_on_warn set ... kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xed/0x130 lib/kobject.c:435 gfs2_sys_fs_add+0x1ff/0x500 fs/gfs2/sys.c:652 fill_super+0x8c9/0x1a40 fs/gfs2/ops_fstype.c:1118 gfs2_mount+0x5e6/0x712 fs/gfs2/ops_fstype.c:1321 mount_fs+0xae/0x328 fs/super.c:1222 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2517 [inline] do_mount+0x564/0x3070 fs/namespace.c:2847 ksys_mount+0x12d/0x140 fs/namespace.c:3063 SYSC_mount fs/namespace.c:3077 [inline] SyS_mount+0x35/0x50 fs/namespace.c:3074 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4431da RSP: 002b:00007fffefa39ad8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004431da RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fffefa39af0 RBP: 0000000000000004 R08: 00000000200004c0 R09: 000000000000000a R10: 0000000000008000 R11: 0000000000000217 R12: 0000000000401c40 R13: 746f72706b636f6c R14: 0030656c69662f2e R15: 6e5f6b636f6c3d6f CPU: 0 PID: 4525 Comm: syzkaller821501 Not tainted 4.16.0+ #4 ------------[ cut here ]------------ Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1b9/0x294 lib/dump_stack.c:113 kobject_add_internal failed for gfs2meta with -EEXIST, don't try to register things with the same name in the same directory. panic+0x22f/0x4de kernel/panic.c:183 WARNING: CPU: 1 PID: 4521 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236 Modules linked in: CPU: 1 PID: 4521 Comm: syzkaller821501 Not tainted 4.16.0+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236 __warn.cold.8+0x163/0x1a3 kernel/panic.c:547 RSP: 0018:ffff8801b4bcf480 EFLAGS: 00010286 RAX: 000000000000007d RBX: ffff8801d9619210 RCX: ffffffff815edf6d RDX: 0000000000000000 RSI: ffffffff815f2c21 RDI: ffff8801b4bcefe0 report_bug+0x252/0x2d0 lib/bug.c:186 RBP: ffff8801b4bcf578 R08: ffff8801d93ba580 R09: 0000000000000006 R10: ffff8801d93ba580 R11: 0000000000000000 R12: 00000000ffffffef fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296 R13: ffff8801d3a40f48 R14: 1ffff10036979e9a R15: ffff8801d3a40f00 FS: 0000000001e97880(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006254b8 CR3: 00000001ad479000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:991 RIP: 0010:kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236 RSP: 0018:ffff8801d95a7480 EFLAGS: 00010286 RAX: 000000000000007d RBX: ffff8801d90911d0 RCX: ffffffff815edf6d RDX: 0000000000000000 RSI: ffffffff815f2c21 RDI: ffff8801d95a6fe0 RBP: ffff8801d95a7578 R08: ffff8801d97d6680 R09: 0000000000000006 R10: ffff8801d97d6680 R11: 0000000000000000 R12: 00000000ffffffef kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xed/0x130 lib/kobject.c:435 R13: ffff8801d3a40f48 R14: 1ffff1003b2b4e9a R15: ffff8801d3a40f00 gfs2_sys_fs_add+0x1ff/0x500 fs/gfs2/sys.c:652 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xed/0x130 lib/kobject.c:435 fill_super+0x8c9/0x1a40 fs/gfs2/ops_fstype.c:1118 gfs2_sys_fs_add+0x1ff/0x500 fs/gfs2/sys.c:652 fill_super+0x8c9/0x1a40 fs/gfs2/ops_fstype.c:1118 gfs2_mount+0x5e6/0x712 fs/gfs2/ops_fstype.c:1321 mount_fs+0xae/0x328 fs/super.c:1222 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037 gfs2_mount+0x5e6/0x712 fs/gfs2/ops_fstype.c:1321 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2517 [inline] do_mount+0x564/0x3070 fs/namespace.c:2847 mount_fs+0xae/0x328 fs/super.c:1222 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2517 [inline] do_mount+0x564/0x3070 fs/namespace.c:2847 ksys_mount+0x12d/0x140 fs/namespace.c:3063 SYSC_mount fs/namespace.c:3077 [inline] SyS_mount+0x35/0x50 fs/namespace.c:3074 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 ksys_mount+0x12d/0x140 fs/namespace.c:3063 SYSC_mount fs/namespace.c:3077 [inline] SyS_mount+0x35/0x50 fs/namespace.c:3074 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4431da RSP: 002b:00007fffefa39ad8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004431da RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fffefa39af0 RBP: 0000000000000004 R08: 00000000200004c0 R09: 000000000000000a R10: 0000000000008000 R11: 0000000000000217 R12: 0000000000401c40 R13: 746f72706b636f6c R14: 0030656c69662f2e R15: 6e5f6b636f6c3d6f Code: 00 entry_SYSCALL_64_after_hwframe+0x42/0xb7 00 RIP: 0033:0x4431da 00 00 RSP: 002b:00007fffefa39ad8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 fc ff RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004431da df RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fffefa39af0 RBP: 0000000000000004 R08: 00000000200004c0 R09: 000000000000000a 48 c1 ea R10: 0000000000008000 R11: 0000000000000217 R12: 0000000000401c40 R13: 746f72706b636f6c R14: 0030656c69662f2e R15: 6e5f6b636f6c3d6f 03 80 3c 02 00 0f 85 88 02 00 00 48 8b 13 48 c7 c6 60 b8 41 88 48 c7 c7 c0 b5 41 88 e8 b0 1e 01 fa <0f> 0b e9 47 fb ff ff 4c 89 e7 e8 f1 c4 6e fa e9 e2 f7 ff ff 4c ---[ end trace 35da0c3c1ce3f590 ]--- Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..