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: 1 PID: 4473 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: 0033:0x4430ca RSP: 002b:00007fff5f80e158 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004430ca RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fff5f80e170 RBP: 00000000006cb018 R08: 00000000200004c0 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 6e5f6b636f6c3d6f R13: 746f72706b636f6c R14: 0030656c69662f2e R15: 0000000000000004 CPU: 1 PID: 4473 Comm: syzkaller208561 Not tainted 4.16.0+ #14 ------------[ 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: 0 PID: 4470 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236 Modules linked in: CPU: 0 PID: 4470 Comm: syzkaller208561 Not tainted 4.16.0+ #14 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:ffff8801af7af480 EFLAGS: 00010286 report_bug+0x252/0x2d0 lib/bug.c:186 RAX: 000000000000007d RBX: ffff8801af24d1d0 RCX: ffffffff815f42ed fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296 RDX: 0000000000000000 RSI: ffffffff815f8fa1 RDI: ffff8801af7aefe0 RBP: ffff8801af7af578 R08: ffff8801af794640 R09: 0000000000000006 R10: ffff8801af794640 R11: 0000000000000000 R12: 00000000ffffffef R13: ffff8801d3abea48 R14: 1ffff10035ef5e9a R15: ffff8801d3abea00 FS: 00000000011be880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff0fb79330 CR3: 00000001af480000 CR4: 00000000001406f0 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:991 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: RIP: 0010:kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236 RSP: 0018:ffff8801af4ef480 EFLAGS: 00010286 RAX: 000000000000007d RBX: ffff8801af2a1210 RCX: ffffffff815f42ed RDX: 0000000000000000 RSI: ffffffff815f8fa1 RDI: ffff8801af4eefe0 RBP: ffff8801af4ef578 R08: ffff8801af00c700 R09: 0000000000000006 R10: ffff8801af00c700 R11: 0000000000000000 R12: 00000000ffffffef R13: ffff8801d3abea48 R14: 1ffff10035e9de9a R15: ffff8801d3abea00 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 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 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: 0033:0x4430ca RSP: 002b:00007fff5f80e158 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004430ca RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fff5f80e170 RBP: 00000000006cb018 R08: 00000000200004c0 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 6e5f6b636f6c3d6f entry_SYSCALL_64_after_hwframe+0x42/0xb7 R13: 746f72706b636f6c R14: 0030656c69662f2e R15: 0000000000000004 RIP: 0033:0x4430ca Code: RSP: 002b:00007fff5f80e158 EFLAGS: 00000297 00 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004430ca 00 RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fff5f80e170 RBP: 00000000006cb018 R08: 00000000200004c0 R09: 000000000000000a 00 R10: 0000000000000000 R11: 0000000000000297 R12: 6e5f6b636f6c3d6f 00 R13: 746f72706b636f6c R14: 0030656c69662f2e R15: 0000000000000004 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 88 02 00 00 48 8b 13 48 c7 c6 60 1a 42 88 48 c7 c7 c0 17 42 88 e8 e0 62 fd f9 <0f> 0b e9 47 fb ff ff 4c 89 e7 e8 f1 1b 6b fa e9 e2 f7 ff ff 4c ---[ end trace 34ddd5ed728de6e7 ]--- Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..