[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.255' (ECDSA) to the list of known hosts. syzkaller login: [ 45.165919] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 45.178966] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 45.192434] ------------[ cut here ]------------ [ 45.197205] WARNING: CPU: 1 PID: 8022 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 45.205417] Kernel panic - not syncing: panic_on_warn set ... [ 45.205417] [ 45.212767] CPU: 1 PID: 8022 Comm: syz-executor171 Not tainted 4.14.300-syzkaller #0 [ 45.217780] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 45.220631] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 45.220635] Call Trace: [ 45.220648] dump_stack+0x1b2/0x281 [ 45.220659] panic+0x1f9/0x42d [ 45.220666] ? add_taint.cold+0x16/0x16 [ 45.220679] ? sysfs_warn_dup.cold+0x17/0x26 [ 45.234130] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 45.236655] ? sysfs_warn_dup.cold+0x17/0x26 [ 45.236664] __warn.cold+0x20/0x44 [ 45.236673] ? ist_end_non_atomic+0x10/0x10 [ 45.236681] ? sysfs_warn_dup.cold+0x17/0x26 [ 45.239391] ------------[ cut here ]------------ [ 45.242850] report_bug+0x208/0x250 [ 45.246016] WARNING: CPU: 0 PID: 8017 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 45.249959] do_error_trap+0x195/0x2d0 [ 45.254329] Modules linked in: [ 45.260971] ? math_error+0x2d0/0x2d0 [ 45.268879] ? ___preempt_schedule+0x16/0x18 [ 45.273166] CPU: 0 PID: 8017 Comm: syz-executor171 Not tainted 4.14.300-syzkaller #0 [ 45.277549] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.282269] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 45.282274] task: ffff8880b2ca62c0 task.stack: ffff8880b4ab0000 [ 45.285876] invalid_op+0x1b/0x40 [ 45.294073] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 45.297938] ? sysfs_warn_dup.cold+0x17/0x26 [ 45.301092] RSP: 0018:ffff8880b4ab7728 EFLAGS: 00010282 [ 45.304863] ? sysfs_warn_dup.cold+0x17/0x26 [ 45.317113] ? sysfs_create_dir_ns+0x16f/0x1d0 [ 45.321924] RAX: 000000000000003a RBX: ffff88808ff85d10 RCX: 0000000000000000 [ 45.331250] ? kobject_add_internal+0x28b/0x930 [ 45.337273] RDX: 0000000000000000 RSI: ffffffff878bd060 RDI: ffffed1016956edb [ 45.340702] ? kobject_init_and_add+0xde/0x120 [ 45.345681] RBP: ffff8880b17ba780 R08: 000000000000003a R09: 0000000000000001 [ 45.350060] ? kobject_create_and_add+0x200/0x200 [ 45.355389] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882388380e0 [ 45.359770] ? vsnprintf+0x260/0x1340 [ 45.364318] R13: ffff8880af638680 R14: ffff88808ff85d18 R15: ffff8880957a1cd8 [ 45.371576] ? gfs2_sys_fs_add+0x184/0x3f0 [ 45.376213] FS: 0000555556a31300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 45.383468] ? recover_store+0x100/0x100 [ 45.388016] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.395367] ? snprintf+0xa5/0xd0 [ 45.400178] CR2: 00007f8146207000 CR3: 000000009dd42000 CR4: 00000000003406f0 [ 45.407428] ? strscpy+0x94/0x280 [ 45.411195] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.418444] ? fill_super+0x118b/0x2310 [ 45.422646] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.430849] ? vsnprintf+0x260/0x1340 [ 45.434886] Call Trace: [ 45.440755] ? gfs2_online_uevent+0x1b0/0x1b0 [ 45.444179] sysfs_create_dir_ns+0x16f/0x1d0 [ 45.451419] ? pointer+0x9e0/0x9e0 [ 45.454841] kobject_add_internal+0x28b/0x930 [ 45.462087] ? snprintf+0xa5/0xd0 [ 45.466032] kobject_init_and_add+0xde/0x120 [ 45.473273] ? vsprintf+0x30/0x30 [ 45.477044] ? kobject_create_and_add+0x200/0x200 [ 45.479602] ? set_blocksize+0x125/0x380 [ 45.484078] ? vsnprintf+0x260/0x1340 [ 45.488462] ? gfs2_mount+0x439/0x510 [ 45.491975] gfs2_sys_fs_add+0x184/0x3f0 [ 45.496436] ? fill_super+0x2310/0x2310 [ 45.499862] ? recover_store+0x100/0x100 [ 45.504255] ? alloc_pages_current+0x15d/0x260 [ 45.507667] ? snprintf+0xa5/0xd0 [ 45.512478] ? __lockdep_init_map+0x100/0x560 [ 45.512487] ? mount_fs+0x92/0x2a0 [ 45.516523] ? strscpy+0x94/0x280 [ 45.520650] ? vfs_kern_mount.part.0+0x5b/0x470 [ 45.524420] fill_super+0x118b/0x2310 [ 45.528450] ? do_mount+0xe65/0x2a30 [ 45.532398] ? vsnprintf+0x260/0x1340 [ 45.536431] ? copy_mount_string+0x40/0x40 [ 45.540984] ? gfs2_online_uevent+0x1b0/0x1b0 [ 45.544412] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 45.548876] ? pointer+0x9e0/0x9e0 [ 45.552387] ? copy_mnt_ns+0xa30/0xa30 [ 45.555814] ? snprintf+0xa5/0xd0 [ 45.560472] ? copy_mount_options+0x1fa/0x2f0 [ 45.564241] ? vsprintf+0x30/0x30 [ 45.567925] ? copy_mnt_ns+0xa30/0xa30 [ 45.571697] ? set_blocksize+0x125/0x380 [ 45.575902] ? SyS_mount+0xa8/0x120 [ 45.580372] gfs2_mount+0x439/0x510 [ 45.585362] ? copy_mnt_ns+0xa30/0xa30 [ 45.588873] ? fill_super+0x2310/0x2310 [ 45.592733] ? do_syscall_64+0x1d5/0x640 [ 45.596171] ? alloc_pages_current+0x15d/0x260 [ 45.600635] ? entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 45.604056] ? __lockdep_init_map+0x100/0x560 [ 45.645355] mount_fs+0x92/0x2a0 [ 45.648707] vfs_kern_mount.part.0+0x5b/0x470 [ 45.653190] do_mount+0xe65/0x2a30 [ 45.656711] ? do_raw_spin_unlock+0x164/0x220 [ 45.661200] ? copy_mount_string+0x40/0x40 [ 45.665416] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 45.670412] ? copy_mnt_ns+0xa30/0xa30 [ 45.674282] ? copy_mount_options+0x1fa/0x2f0 [ 45.678757] ? copy_mnt_ns+0xa30/0xa30 [ 45.682625] SyS_mount+0xa8/0x120 [ 45.686059] ? copy_mnt_ns+0xa30/0xa30 [ 45.689926] do_syscall_64+0x1d5/0x640 [ 45.693818] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 45.698995] Code: bd ea ff ff ff e9 69 d3 9f fa 4c 89 ff e8 be ed 7a fa eb da e8 f7 2f 51 fa 4c 89 ea 48 89 ee 48 c7 c7 c0 c4 95 87 e8 04 fc fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 96 c3 7a fa e8 d1 2f 51 fa 4d [ 45.718173] ---[ end trace df25d6e2fdfa39d1 ]--- [ 45.722964] Kernel Offset: disabled [ 45.726616] Rebooting in 86400 seconds..