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: 4442 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: 0033:0x44308a RSP: 002b:00007ffc06cd2388 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044308a RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffc06cd23a0 RBP: 00000000006cb018 R08: 0000000020004940 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 0000000020004940 R13: 0000000000000004 R14: 0030656c69662f2e R15: 00000000004a1e40 CPU: 1 PID: 4442 Comm: syzkaller420697 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: 0 PID: 4445 at lib/kobject.c:238 kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236 Modules linked in: __warn.cold.8+0x163/0x1a3 kernel/panic.c:547 CPU: 0 PID: 4445 Comm: syzkaller420697 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 report_bug+0x252/0x2d0 lib/bug.c:186 RSP: 0018:ffff8801b3e77480 EFLAGS: 00010286 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296 RAX: 000000000000007d RBX: ffff8801b39811d0 RCX: ffffffff815edf6d RDX: 0000000000000000 RSI: ffffffff815f2c21 RDI: ffff8801b3e76fe0 RBP: ffff8801b3e77578 R08: ffff8801b390a000 R09: 0000000000000006 R10: ffff8801b390a000 R11: 0000000000000000 R12: 00000000ffffffef R13: ffff8801d398b848 R14: 1ffff100367cee9a R15: ffff8801d398b800 FS: 0000000002233880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004b57d8 CR3: 00000001ccc27000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:991 Call Trace: RIP: 0010:kobject_add_internal+0x8e0/0xba0 lib/kobject.c:236 RSP: 0018:ffff8801b3947480 EFLAGS: 00010286 RAX: 000000000000007d RBX: ffff8801b3f19190 RCX: ffffffff815edf6d RDX: 0000000000000000 RSI: ffffffff815f2c21 RDI: ffff8801b3946fe0 RBP: ffff8801b3947578 R08: ffff8801b3b966c0 R09: 0000000000000006 R10: ffff8801b3b966c0 R11: 0000000000000000 R12: 00000000ffffffef R13: ffff8801d398b848 R14: 1ffff10036728e9a R15: ffff8801d398b800 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 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 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2517 [inline] do_mount+0x564/0x3070 fs/namespace.c:2847 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 ksys_mount+0x12d/0x140 fs/namespace.c:3063 SYSC_mount fs/namespace.c:3077 [inline] SyS_mount+0x35/0x50 fs/namespace.c:3074 entry_SYSCALL_64_after_hwframe+0x42/0xb7 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287 RIP: 0033:0x44308a RSP: 002b:00007ffc06cd2388 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044308a RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffc06cd23a0 RBP: 00000000006cb018 R08: 0000000020004940 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 0000000020004940 R13: 0000000000000004 R14: 0030656c69662f2e R15: 00000000004a1e40 Code: 00 00 entry_SYSCALL_64_after_hwframe+0x42/0xb7 00 RIP: 0033:0x44308a 00 RSP: 002b:00007ffc06cd2388 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 fc RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044308a RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffc06cd23a0 ff RBP: 00000000006cb018 R08: 0000000020004940 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 0000000020004940 df 48 R13: 0000000000000004 R14: 0030656c69662f2e R15: 00000000004a1e40 c1 ea 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 d39226115892bec2 ]--- Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..