sysfs_warn_dup+0x83/0xa0 fs/sysfs/dir.c:30 sysfs_create_dir_ns+0x178/0x1d0 fs/sysfs/dir.c:58 kobject_add_internal failed for . with -EEXIST, don't try to register things with the same name in the same directory. create_dir lib/kobject.c:69 [inline] kobject_add_internal+0x335/0xbc0 lib/kobject.c:227 WARNING: CPU: 1 PID: 4478 at lib/kobject.c:238 kobject_add_internal+0x8d4/0xbc0 lib/kobject.c:235 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:2509 [inline] do_new_mount fs/namespace.c:2512 [inline] do_mount+0xea4/0x2bb0 fs/namespace.c:2842 SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x44308a RSP: 002b:00007fffb80b93a8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044308a RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fffb80b93c0 RBP: 00000000006cb018 R08: 0000000020000180 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 0000000020000180 R13: 0000000000000004 R14: 0030656c69662f2e R15: 00000000004a1e40 CPU: 1 PID: 4478 Comm: syzkaller666675 Not tainted 4.16.0+ #11 ------------[ 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: 4476 at lib/kobject.c:238 kobject_add_internal+0x8d4/0xbc0 lib/kobject.c:235 Modules linked in: CPU: 0 PID: 4476 Comm: syzkaller666675 Not tainted 4.16.0+ #11 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 RSP: 0018:ffff8801ad3cf4a0 EFLAGS: 00010282 RAX: dffffc0000000008 RBX: ffff8801d8f3d210 RCX: ffffffff815ae26e RDX: 0000000000000000 RSI: 1ffff10035a79e44 RDI: 1ffff10035a79e19 __warn+0x1dc/0x200 kernel/panic.c:547 RBP: ffff8801ad3cf598 R08: 1ffff10035a79ddb R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff10035a79e9a R13: 00000000ffffffef R14: ffff8801d426f448 R15: 1ffff10035a79e9e FS: 0000000001504880(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 report_bug+0x1f4/0x2b0 lib/bug.c:186 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004b57b8 CR3: 00000001da510001 CR4: 00000000001606f0 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 fixup_bug arch/x86/kernel/traps.c:247 [inline] do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xf9/0x150 lib/kobject.c:436 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:986 RIP: 0010:kobject_add_internal+0x8d4/0xbc0 lib/kobject.c:235 gfs2_sys_fs_add+0x1ff/0x580 fs/gfs2/sys.c:652 RSP: 0018:ffff8801be6974a0 EFLAGS: 00010282 RAX: dffffc0000000008 RBX: ffff8801d8e0d1d0 RCX: ffffffff815ae26e RDX: 0000000000000000 RSI: 1ffff10037cd2e44 RDI: 1ffff10037cd2e19 RBP: ffff8801be697598 R08: 1ffff10037cd2ddb R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 1ffff10037cd2e9a R13: 00000000ffffffef R14: ffff8801d426f448 R15: 1ffff10037cd2e9e fill_super+0x86f/0x1d70 fs/gfs2/ops_fstype.c:1118 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 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 fill_super+0x86f/0x1d70 fs/gfs2/ops_fstype.c:1118 vfs_kern_mount fs/namespace.c:2509 [inline] do_new_mount fs/namespace.c:2512 [inline] do_mount+0xea4/0x2bb0 fs/namespace.c:2842 gfs2_mount+0x587/0x6e0 fs/gfs2/ops_fstype.c:1321 SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 vfs_kern_mount fs/namespace.c:2509 [inline] do_new_mount fs/namespace.c:2512 [inline] do_mount+0xea4/0x2bb0 fs/namespace.c:2842 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x44308a RSP: 002b:00007fffb80b93a8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044308a RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fffb80b93c0 RBP: 00000000006cb018 R08: 0000000020000180 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 0000000020000180 R13: 0000000000000004 R14: 0030656c69662f2e R15: 00000000004a1e40 Code: SYSC_mount fs/namespace.c:3058 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3035 00 00 00 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 00 fc ff df 48 c1 ea 03 80 3c 02 entry_SYSCALL_64_after_hwframe+0x42/0xb7 00 RIP: 0033:0x44308a 0f RSP: 002b:00007fffb80b93a8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 85 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044308a RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00007fffb80b93c0 aa RBP: 00000000006cb018 R08: 0000000020000180 R09: 000000000000000a R10: 0000000000000000 R11: 0000000000000297 R12: 0000000020000180 00 R13: 0000000000000004 R14: 0030656c69662f2e R15: 00000000004a1e40 00 00 48 8b 13 48 c7 c6 c0 37 d6 87 48 c7 c7 20 35 d6 87 e8 4c d3 5d fa <0f> 0b e9 1d fb ff ff e8 c0 8e 8d fa 0f 0b e9 29 fe ff ff e8 b4 ---[ end trace e59962590fc504cc ]--- Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..