sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' do_mmap+0x5b3/0xcb0 mm/mmap.c:1495 do_mmap_pgoff include/linux/mm.h:2187 [inline] vm_mmap_pgoff+0x14e/0x1a0 mm/util.c:366 ------------[ cut here ]------------ SYSC_mmap_pgoff mm/mmap.c:1545 [inline] SyS_mmap_pgoff+0x3c5/0x510 mm/mmap.c:1503 WARNING: CPU: 1 PID: 10191 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 Kernel panic - not syncing: panic_on_warn set ... do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7ff0f0476122 RSP: 002b:00007ff0ee9e7f28 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000022 RCX: 00007ff0f0476122 RDX: 0000000000000003 RSI: 0000000008400000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000022 R11: 0000000000000246 R12: 000000000001ee21 R13: 00007ff0ee9e7fdc R14: 00007ff0ee9e7fe0 R15: 000000002001ef02 CPU: 1 PID: 10191 Comm: syz-executor.0 Not tainted 4.14.301-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 panic+0x1f9/0x42d kernel/panic.c:183 __warn.cold+0x20/0x44 kernel/panic.c:547 report_bug+0x208/0x250 lib/bug.c:183 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 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:967 RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 RSP: 0018:ffff88809dc77728 EFLAGS: 00010282 RAX: 000000000000003a RBX: ffff88804fd242d0 RCX: 0000000000000000 RDX: 0000000000022f4a RSI: ffffffff814443b0 RDI: ffffed1013b8eedb RBP: ffff88809dd06dc0 R08: 000000000000003a R09: 0000000000000000 sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b12b8000 R13: ffff8880aafb3080 R14: ffff88804fd242d8 R15: ffff8880a9550398 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 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 10201 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 Modules linked in: fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1127 CPU: 0 PID: 10201 Comm: syz-executor.1 Not tainted 4.14.301-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 task: ffff8880a906a580 task.stack: ffff8880abaf0000 RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 RSP: 0018:ffff8880abaf7728 EFLAGS: 00010282 RAX: 000000000000003a RBX: ffff888091bf44d0 RCX: 0000000000000000 RDX: 000000000003541f RSI: ffffffff814443b0 RDI: ffffed101575eedb gfs2_mount+0x439/0x510 fs/gfs2/ops_fstype.c:1340 RBP: ffff88809732ea40 R08: 000000000000003a R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b12b8000 R13: ffff8880b56a03c0 R14: ffff888091bf44d8 R15: ffff88804fd242d8 FS: 00007fabae4e6700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556db6708 CR3: 00000000a7efa000 CR4: 00000000003406f0 mount_fs+0x92/0x2a0 fs/super.c:1237 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2572 [inline] do_mount+0xe65/0x2a30 fs/namespace.c:2905 Call Trace: 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 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 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1127 RIP: 0033:0x7fd2ae5a960a RSP: 002b:00007fd2acb19f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000037f0c RCX: 00007fd2ae5a960a RDX: 0000000020037f40 RSI: 0000000020037f80 RDI: 00007fd2acb19fe0 RBP: 00007fd2acb1a020 R08: 00007fd2acb1a020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020037f40 R13: 0000000020037f80 R14: 00007fd2acb19fe0 R15: 0000000020037fc0 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 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 RIP: 0033:0x7fabaff7560a RSP: 002b:00007fabae4e5f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000037f19 RCX: 00007fabaff7560a RDX: 0000000020037f40 RSI: 0000000020037f80 RDI: 00007fabae4e5fe0 RBP: 00007fabae4e6020 R08: 00007fabae4e6020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020037f40 R13: 0000000020037f80 R14: 00007fabae4e5fe0 R15: 0000000020037fc0 Code: bd ea ff ff ff e9 9f c3 9f fa 4c 89 ff e8 d4 e0 7a fa eb da e8 cd 1f 51 fa 4c 89 ea 48 89 ee 48 c7 c7 80 c4 95 87 e8 e5 fb fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 ac b6 7a fa e8 a7 1f 51 fa 4d ---[ end trace 391e67741840816d ]--- Kernel Offset: disabled Rebooting in 86400 seconds..