gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" gfs2: fsid=syz:syz: Now mounting FS... sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' gfs2: fsid=syz:syz.0: journal 0 mapped with 8 extents ------------[ cut here ]------------ WARNING: CPU: 1 PID: 12757 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: 12757 Comm: syz-executor.0 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 panic+0x21d/0x451 kernel/panic.c:247 check_panic_on_warn.cold+0x19/0x35 kernel/panic.c:171 __warn+0xdf/0x1e0 kernel/panic.c:603 ------------[ cut here ]------------ report_bug+0x208/0x250 lib/bug.c:183 WARNING: CPU: 0 PID: 12771 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 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 Modules linked in: CPU: 0 PID: 12771 Comm: syz-executor.4 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 task: ffff888091c02480 task.stack: ffff888065580000 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967 RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 RSP: 0018:ffff888065587728 EFLAGS: 00010282 RSP: 0018:ffff888091d6f728 EFLAGS: 00010282 RAX: 000000000000003a RBX: ffff888064edcc10 RCX: 0000000000000000 RDX: 000000000002d0e0 RSI: ffffffff814443b0 RDI: ffffed100cab0edb RAX: 000000000000003a RBX: ffff88806b7890d0 RCX: 0000000000000000 RBP: ffff88806af58680 R08: 000000000000003a R09: 0000000000000001 RDX: 000000000000dc24 RSI: ffffffff814443b0 RDI: ffffed10123adedb R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882388788c0 RBP: ffff88806a960480 R08: 000000000000003a R09: 0000000000000000 R13: ffff8880aa8b5280 R14: ffff888064edcc18 R15: ffff88806b7890d8 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882388788c0 FS: 00007f593c05c700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 R13: ffff8880a9b4c940 R14: ffff88806b7890d8 R15: ffff88805fa31118 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f593c05d000 CR3: 00000000ae5e8000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x28b/0x930 lib/kobject.c:229 Call Trace: 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 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 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 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 RIP: 0033:0x7f2e551d962a RSP: 002b:00007f2e53749f88 EFLAGS: 00000202 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 ORIG_RAX: 00000000000000a5 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RAX: ffffffffffffffda RBX: 0000000000012544 RCX: 00007f2e551d962a RIP: 0033:0x7f593daeb62a RDX: 0000000020000100 RSI: 0000000020012500 RDI: 00007f2e53749fe0 RSP: 002b:00007f593c05bf88 EFLAGS: 00000202 RBP: 00007f2e5374a020 R08: 00007f2e5374a020 R09: 0000000000000819 ORIG_RAX: 00000000000000a5 R10: 0000000000000819 R11: 0000000000000202 R12: 0000000020000100 RAX: ffffffffffffffda RBX: 0000000000012544 RCX: 00007f593daeb62a R13: 0000000020012500 R14: 00007f2e53749fe0 R15: 0000000020000140 RDX: 0000000020000100 RSI: 0000000020012500 RDI: 00007f593c05bfe0 RBP: 00007f593c05c020 R08: 00007f593c05c020 R09: 0000000000000819 R10: 0000000000000819 R11: 0000000000000202 R12: 0000000020000100 R13: 0000000020012500 R14: 00007f593c05bfe0 R15: 0000000020000140 Code: 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 154f4a948faa1ee1 ]--- Kernel Offset: disabled Rebooting in 86400 seconds..