sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' gfs2: fsid=syz:syz: Now mounting FS... sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7987 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 ------------[ cut here ]------------ Kernel panic - not syncing: panic_on_warn set ... WARNING: CPU: 0 PID: 7982 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 CPU: 1 PID: 7987 Comm: syz-executor204 Not tainted 4.14.304-syzkaller #0 Modules linked in: Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: CPU: 0 PID: 7982 Comm: syz-executor204 Not tainted 4.14.304-syzkaller #0 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 panic+0x1f9/0x42d kernel/panic.c:183 task: ffff8880b30203c0 task.stack: ffff8880b3148000 RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 RSP: 0018:ffff8880b314f728 EFLAGS: 00010282 __warn.cold+0x20/0x44 kernel/panic.c:547 RAX: 000000000000003a RBX: ffff8880b2911a90 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1016629edb RBP: ffff8880b2dba300 R08: 000000000000003a R09: 0000000000000000 report_bug+0x208/0x250 lib/bug.c:183 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238fda620 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 R13: ffff8880b10bef40 R14: ffff8880b2911a98 R15: ffff888099659a18 FS: 0000555556cec300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560c8f012000 CR3: 00000000b399d000 CR4: 00000000003406f0 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 RSP: 0018:ffff8880b330f728 EFLAGS: 00010282 Call Trace: sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 RAX: 000000000000003a RBX: ffff888095795a50 RCX: 0000000000000000 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x28b/0x930 lib/kobject.c:229 RDX: 0000000000000000 RSI: ffffffff878bd020 RDI: ffffed1016661edb kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xde/0x120 lib/kobject.c:436 RBP: ffff8880b2ee6340 R08: 000000000000003a R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238fda620 R13: ffff8880b4f6de80 R14: ffff888095795a58 R15: ffff8880b2911a98 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 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 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1127 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1127 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 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 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2572 [inline] do_mount+0xe65/0x2a30 fs/namespace.c:2905 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fca4048a6da RSP: 002b:00007ffe5c376538 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 SYSC_mount fs/namespace.c:3121 [inline] SyS_mount+0xa8/0x120 fs/namespace.c:3098 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fca4048a6da RDX: 0000000020000040 RSI: 0000000020012500 RDI: 00007ffe5c376550 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 RBP: 00007ffe5c376550 R08: 00007ffe5c376590 R09: 0000000000000002 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 R13: 0000555556cec2c0 R14: 0000000000000000 R15: 00007ffe5c376590 RIP: 0033:0x7fca4048a6da Code: RSP: 002b:00007ffe5c376538 EFLAGS: 00000282 bd ORIG_RAX: 00000000000000a5 ea RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fca4048a6da ff RDX: 0000000020000040 RSI: 0000000020012500 RDI: 00007ffe5c376550 ff RBP: 00007ffe5c376550 R08: 00007ffe5c376590 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 ff R13: 0000555556cec2c0 R14: 0000000000000000 R15: 00007ffe5c376590 e9 d9 9a 9f fa 4c 89 ff e8 3e b5 7a fa eb da e8 77 f2 50 fa 4c 89 ea 48 89 ee 48 c7 c7 c0 c4 95 87 e8 e9 fb fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 16 8b 7a fa e8 51 f2 50 fa 4d ---[ end trace daba34f2e0b37dbb ]--- Kernel Offset: disabled Rebooting in 86400 seconds..