sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' ------------[ cut here ]------------ sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' WARNING: CPU: 1 PID: 7977 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 1 PID: 7977 Comm: syz-executor165 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 ------------[ cut here ]------------ Call Trace: WARNING: CPU: 0 PID: 7973 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 Modules linked in: panic+0x21d/0x451 kernel/panic.c:247 CPU: 0 PID: 7973 Comm: syz-executor165 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 task: ffff8880b3426000 task.stack: ffff888099710000 check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:171 RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 __warn+0xdf/0x1e0 kernel/panic.c:603 RSP: 0018:ffff888099717728 EFLAGS: 00010282 RAX: 000000000000003a RBX: ffff8880b1811bd0 RCX: 0000000000000000 report_bug+0x208/0x250 lib/bug.c:183 RDX: 0000000000000000 RSI: ffffffff878bd360 RDI: ffffed10132e2edb fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295 RBP: ffff8880b3044540 R08: 000000000000003a R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0feb380 R13: ffff8880b2d96cc0 R14: ffff8880b1811bd8 R15: ffff8880a8ea5958 FS: 0000555555af1300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 CR2: 000055cc7bfca8b8 CR3: 00000000b040e000 CR4: 00000000003406f0 RSP: 0018:ffff888095fef728 EFLAGS: 00010282 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 RAX: 000000000000003a RBX: ffff8880a8ea5950 RCX: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 RDX: 0000000000000000 RSI: ffffffff878bd360 RDI: ffffed1012bfdedb Call Trace: RBP: ffff88809575aa40 R08: 000000000000003a R09: 0000000000000000 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0feb380 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x28b/0x930 lib/kobject.c:229 R13: ffff8880b085f9c0 R14: ffff8880a8ea5958 R15: ffff8880a4114e58 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xde/0x120 lib/kobject.c:436 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x28b/0x930 lib/kobject.c:229 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xde/0x120 lib/kobject.c:436 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1127 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1127 gfs2_mount+0x439/0x510 fs/gfs2/ops_fstype.c:1340 gfs2_mount+0x439/0x510 fs/gfs2/ops_fstype.c:1340 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2572 [inline] do_mount+0xe65/0x2a30 fs/namespace.c:2905 mount_fs+0x92/0x2a0 fs/super.c:1237 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2572 [inline] do_mount+0xe65/0x2a30 fs/namespace.c:2905 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7f7fc3b936da do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 RSP: 002b:00007ffeaf617f98 EFLAGS: 00000282 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 ORIG_RAX: 00000000000000a5 RIP: 0033:0x7f7fc3b936da RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f7fc3b936da RSP: 002b:00007ffeaf617f98 EFLAGS: 00000282 RDX: 00000000200124c0 RSI: 0000000020000080 RDI: 00007ffeaf617fa0 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f7fc3b936da RBP: 00007ffeaf617fa0 R08: 00007ffeaf617fe0 R09: 0000000000000002 RDX: 00000000200124c0 RSI: 0000000020000080 RDI: 00007ffeaf617fa0 R10: 0000000000010011 R11: 0000000000000282 R12: 0000000000000004 RBP: 00007ffeaf617fa0 R08: 00007ffeaf617fe0 R09: 0000000000000002 R13: 0000555555af12c0 R14: 00007ffeaf617fe0 R15: 0000000000000000 R10: 0000000000010011 R11: 0000000000000282 R12: 0000000000000004 Code: R13: 0000555555af12c0 R14: 00007ffeaf617fe0 R15: 0000000000000000 bd ea ff ff ff e9 ff 95 9f fa 4c 89 ff e8 64 ae 7a fa eb da e8 ed ea 50 fa 4c 89 ea 48 89 ee 48 c7 c7 80 c8 95 87 e8 fd fb fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 3c 84 7a fa e8 c7 ea 50 fa 4d ---[ end trace b55f5c00f7006e8c ]--- Kernel Offset: disabled Rebooting in 86400 seconds..