Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1a7/0x27d lib/dump_stack.c:53 kobject_add_internal failed for . with -EEXIST, don't try to register things with the same name in the same directory. sysfs_warn_dup+0x83/0xa0 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x178/0x1d0 fs/sysfs/dir.c:58 WARNING: CPU: 1 PID: 4356 at lib/kobject.c:238 kobject_add_internal+0x8d4/0xbc0 lib/kobject.c:235 create_dir lib/kobject.c:69 [inline] kobject_add_internal+0x335/0xbc0 lib/kobject.c:227 Kernel panic - not syncing: panic_on_warn set ... kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xf9/0x150 lib/kobject.c:436 gfs2_sys_fs_add+0x1ff/0x580 fs/gfs2/sys.c:652 fill_super+0x86f/0x1d70 fs/gfs2/ops_fstype.c:1118 gfs2_mount+0x587/0x6e0 fs/gfs2/ops_fstype.c:1321 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:2514 [inline] do_new_mount fs/namespace.c:2517 [inline] do_mount+0xea4/0x2b90 fs/namespace.c:2847 ksys_mount+0xab/0x120 fs/namespace.c:3063 SYSC_mount fs/namespace.c:3077 [inline] SyS_mount+0x39/0x50 fs/namespace.c:3074 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4430da RSP: 002b:00007ffd1f092af8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004430da RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffd1f092b10 RBP: 00000000006cb018 R08: 0000000020000300 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 746f72706b636f6c R13: 6c6261746b636f6c R14: 0030656c69662f2e R15: 0000000000000004 CPU: 1 PID: 4356 Comm: syzkaller899972 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:17 [inline] dump_stack+0x1a7/0x27d lib/dump_stack.c:53 kobject_add_internal failed for . with -EEXIST, don't try to register things with the same name in the same directory. panic+0x1f8/0x42c kernel/panic.c:183 WARNING: CPU: 0 PID: 4358 at lib/kobject.c:238 kobject_add_internal+0x8d4/0xbc0 lib/kobject.c:235 Modules linked in: CPU: 0 PID: 4358 Comm: syzkaller899972 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+0x8d4/0xbc0 lib/kobject.c:235 __warn+0x1dc/0x200 kernel/panic.c:547 RSP: 0018:ffff8801b9807470 EFLAGS: 00010282 RAX: dffffc0000000008 RBX: ffff8801b9a3d110 RCX: ffffffff815b5d2e RDX: 0000000000000000 RSI: 1ffff10037300e3e RDI: 1ffff10037300e13 report_bug+0x1f4/0x2b0 lib/bug.c:186 RBP: ffff8801b9807568 R08: 1ffff10037300dd5 R09: 0000000000000001 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff10037300e94 R13: 00000000ffffffef R14: ffff8801d411b148 R15: 1ffff10037300e98 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 FS: 000000000119f880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000200f100 CR3: 00000001c426b000 CR4: 00000000001406f0 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+0x8d4/0xbc0 lib/kobject.c:235 RSP: 0018:ffff8801b9aa7470 EFLAGS: 00010282 RAX: dffffc0000000008 RBX: ffff8801b992d0d0 RCX: ffffffff815b5d2e kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xf9/0x150 lib/kobject.c:436 RDX: 0000000000000000 RSI: 1ffff10037354e3e RDI: 1ffff10037354e13 RBP: ffff8801b9aa7568 R08: 1ffff10037354dd5 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff10037354e94 R13: 00000000ffffffef R14: ffff8801d411b148 R15: 1ffff10037354e98 gfs2_sys_fs_add+0x1ff/0x580 fs/gfs2/sys.c:652 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xf9/0x150 lib/kobject.c:436 fill_super+0x86f/0x1d70 fs/gfs2/ops_fstype.c:1118 gfs2_sys_fs_add+0x1ff/0x580 fs/gfs2/sys.c:652 fill_super+0x86f/0x1d70 fs/gfs2/ops_fstype.c:1118 gfs2_mount+0x587/0x6e0 fs/gfs2/ops_fstype.c:1321 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:2514 [inline] do_new_mount fs/namespace.c:2517 [inline] do_mount+0xea4/0x2b90 fs/namespace.c:2847 gfs2_mount+0x587/0x6e0 fs/gfs2/ops_fstype.c:1321 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:2514 [inline] do_new_mount fs/namespace.c:2517 [inline] do_mount+0xea4/0x2b90 fs/namespace.c:2847 ksys_mount+0xab/0x120 fs/namespace.c:3063 SYSC_mount fs/namespace.c:3077 [inline] SyS_mount+0x39/0x50 fs/namespace.c:3074 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4430da RSP: 002b:00007ffd1f092af8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004430da RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffd1f092b10 RBP: 00000000006cb018 R08: 0000000020000300 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 746f72706b636f6c R13: 6c6261746b636f6c R14: 0030656c69662f2e R15: 0000000000000004 ksys_mount+0xab/0x120 fs/namespace.c:3063 SYSC_mount fs/namespace.c:3077 [inline] SyS_mount+0x39/0x50 fs/namespace.c:3074 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4430da RSP: 002b:00007ffd1f092af8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004430da RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007ffd1f092b10 RBP: 00000000006cb018 R08: 0000000020000300 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 746f72706b636f6c R13: 6c6261746b636f6c R14: 0030656c69662f2e R15: 0000000000000004 Code: 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 aa 00 00 00 48 8b 13 48 c7 c6 80 7f d6 87 48 c7 c7 e0 7c d6 87 e8 3c f3 58 fa <0f> 0b e9 1d fb ff ff e8 60 0c 89 fa 0f 0b e9 29 fe ff ff e8 54 ---[ end trace d47ee085e0f44dcb ]--- Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..