gfs2: fsid=syz:syz.0: jid=0: Looking at journal... gfs2: fsid=syz:syz.0: jid=0: Done gfs2: fsid=syz:syz.0: first mount done, others may mount sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' ------------[ cut here ]------------ WARNING: CPU: 1 PID: 9850 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: 9850 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 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 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:ffff8880af39f728 EFLAGS: 00010282 RAX: 000000000000003a RBX: ffff88808d934410 RCX: 0000000000000000 RDX: 000000000000c25c RSI: ffffffff814443b0 RDI: ffffed1015e73edb RBP: ffff88809c246240 R08: 000000000000003a R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238826b60 sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' R13: ffff88809e821300 R14: ffff88808d934418 R15: ffff8880b46183d8 ------------[ cut here ]------------ sysfs_create_dir_ns+0x16f/0x1d0 fs/sysfs/dir.c:59 WARNING: CPU: 0 PID: 9868 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 create_dir lib/kobject.c:71 [inline] kobject_add_internal+0x28b/0x930 lib/kobject.c:229 Modules linked in: kobject_add_varg lib/kobject.c:364 [inline] kobject_init_and_add+0xde/0x120 lib/kobject.c:436 CPU: 0 PID: 9868 Comm: syz-executor.2 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 task: ffff88809c77a540 task.stack: ffff888090a18000 gfs2_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 fs/sysfs/dir.c:30 RSP: 0018:ffff888090a1f728 EFLAGS: 00010282 RAX: 000000000000003a RBX: ffff88809d2e4450 RCX: 0000000000000000 RDX: 000000000000ef54 RSI: ffffffff814443b0 RDI: ffffed1012143edb fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1127 RBP: ffff8880a0836700 R08: 000000000000003a R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238826b60 R13: ffff88809c744780 R14: ffff88809d2e4458 R15: ffff88808d934418 FS: 00007f06a3ebc700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f06a3ebd000 CR3: 00000000b5135000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 gfs2_mount+0x439/0x510 fs/gfs2/ops_fstype.c:1340 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 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_sys_fs_add+0x184/0x3f0 fs/gfs2/sys.c:652 fill_super+0x118b/0x2310 fs/gfs2/ops_fstype.c:1127 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: 0033:0x7f461d53662a RSP: 002b:00007f461baa6f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 gfs2_mount+0x439/0x510 fs/gfs2/ops_fstype.c:1340 RAX: ffffffffffffffda RBX: 00000000000124dc RCX: 00007f461d53662a RDX: 00000000200124c0 RSI: 0000000020012500 RDI: 00007f461baa6fe0 RBP: 00007f461baa7020 R08: 00007f461baa7020 R09: 000000000020400f R10: 000000000020400f R11: 0000000000000202 R12: 00000000200124c0 mount_fs+0x92/0x2a0 fs/super.c:1237 R13: 0000000020012500 R14: 00007f461baa6fe0 R15: 0000000020000040 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: 0033:0x7f06a594b62a RSP: 002b:00007f06a3ebbf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000000124dc RCX: 00007f06a594b62a RDX: 00000000200124c0 RSI: 0000000020012500 RDI: 00007f06a3ebbfe0 RBP: 00007f06a3ebc020 R08: 00007f06a3ebc020 R09: 000000000020400f R10: 000000000020400f R11: 0000000000000202 R12: 00000000200124c0 R13: 0000000020012500 R14: 00007f06a3ebbfe0 R15: 0000000020000040 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 d5db78eac8c4d3df ]--- Kernel Offset: disabled Rebooting in 86400 seconds..