[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.59' (ECDSA) to the list of known hosts. syzkaller login: [ 34.011467] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 34.019922] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 34.028792] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 34.038463] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 34.039984] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 34.047024] ------------[ cut here ]------------ [ 34.056654] WARNING: CPU: 1 PID: 7998 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 34.057700] ------------[ cut here ]------------ [ 34.064874] Kernel panic - not syncing: panic_on_warn set ... [ 34.064874] [ 34.069631] WARNING: CPU: 0 PID: 7996 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 34.076974] CPU: 1 PID: 7998 Comm: syz-executor563 Not tainted 4.14.206-syzkaller #0 [ 34.085177] Modules linked in: [ 34.093041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.096219] Call Trace: [ 34.105567] CPU: 0 PID: 7996 Comm: syz-executor563 Not tainted 4.14.206-syzkaller #0 [ 34.108157] dump_stack+0x1b2/0x283 [ 34.116007] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.119626] panic+0x1f9/0x42d [ 34.128957] task: ffff888095b16280 task.stack: ffff888095a08000 [ 34.132157] ? add_taint.cold+0x16/0x16 [ 34.138188] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 34.142137] ? sysfs_warn_dup.cold+0x17/0x2d [ 34.147139] RSP: 0018:ffff888095a0f728 EFLAGS: 00010282 [ 34.151542] ? sysfs_warn_dup.cold+0x17/0x2d [ 34.156876] RAX: 000000000000003a RBX: ffff888096524c90 RCX: 0000000000000000 [ 34.161281] __warn.cold+0x20/0x4b [ 34.168538] RDX: 0000000000000000 RSI: ffffffff878bb940 RDI: ffffed1012b41edb [ 34.172088] ? ist_end_non_atomic+0x10/0x10 [ 34.179333] RBP: ffff8880b47d8380 R08: 000000000000003a R09: 0000000000000000 [ 34.183645] ? sysfs_warn_dup.cold+0x17/0x2d [ 34.190897] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0f1cd20 [ 34.195306] report_bug+0x208/0x249 [ 34.202556] R13: ffff8880b0b84f40 R14: ffff888096524c98 R15: ffff8880959f4c18 [ 34.202563] FS: 000000000159c880(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 34.206175] do_error_trap+0x195/0x2d0 [ 34.213416] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.221628] ? math_error+0x2d0/0x2d0 [ 34.225502] CR2: 00007ffcdd155ba7 CR3: 0000000099069000 CR4: 00000000001406f0 [ 34.231364] ? ___preempt_schedule+0x16/0x18 [ 34.235136] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.242397] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.246774] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.254029] invalid_op+0x1b/0x40 [ 34.258851] Call Trace: [ 34.266117] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 34.269543] sysfs_create_dir_ns+0x16f/0x1d0 [ 34.272107] RSP: 0018:ffff8880b2c5f728 EFLAGS: 00010282 [ 34.277106] kobject_add_internal+0x28b/0x930 [ 34.286836] kobject_init_and_add+0xde/0x120 [ 34.291313] RAX: 000000000000003a RBX: ffff8880959f4c10 RCX: 0000000000000000 [ 34.295709] ? kobject_create_and_add+0x200/0x200 [ 34.302958] RDX: 0000000000000000 RSI: ffffffff878bb940 RDI: ffffed101658bedb [ 34.307782] ? vsnprintf+0x260/0x1340 [ 34.315037] RBP: ffff8880b292a2c0 R08: 000000000000003a R09: 0000000000000000 [ 34.318820] gfs2_sys_fs_add+0x184/0x3f0 [ 34.326063] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0f1cd20 [ 34.330101] ? recover_store+0x100/0x100 [ 34.337351] R13: ffff8880b0be33c0 R14: ffff8880959f4c18 R15: ffff888095570c58 [ 34.341394] ? snprintf+0xa5/0xd0 [ 34.348665] ? sysfs_warn_dup.cold+0x17/0x2d [ 34.352082] ? memcpy+0x35/0x50 [ 34.356464] sysfs_create_dir_ns+0x16f/0x1d0 [ 34.359716] fill_super+0x118b/0x2310 [ 34.364112] kobject_add_internal+0x28b/0x930 [ 34.367904] ? vsnprintf+0x260/0x1340 [ 34.372373] kobject_init_and_add+0xde/0x120 [ 34.376161] ? gfs2_online_uevent+0x1b0/0x1b0 [ 34.380543] ? kobject_create_and_add+0x200/0x200 [ 34.385011] ? pointer+0x9e0/0x9e0 [ 34.389828] ? vsnprintf+0x260/0x1340 [ 34.393346] ? snprintf+0xa5/0xd0 [ 34.397143] gfs2_sys_fs_add+0x184/0x3f0 [ 34.400571] ? vsprintf+0x30/0x30 [ 34.404606] ? recover_store+0x100/0x100 [ 34.408048] ? gfs2_open+0x160/0x160 [ 34.412102] ? snprintf+0xa5/0xd0 [ 34.415796] ? set_blocksize+0x125/0x380 [ 34.419224] ? memcpy+0x35/0x50 [ 34.423260] gfs2_mount+0x439/0x502 [ 34.426515] fill_super+0x118b/0x2310 [ 34.430115] ? fill_super+0x2310/0x2310 [ 34.433894] ? vsnprintf+0x260/0x1340 [ 34.437855] ? alloc_pages_current+0x15d/0x260 [ 34.441618] ? gfs2_online_uevent+0x1b0/0x1b0 [ 34.446178] ? __lockdep_init_map+0x100/0x560 [ 34.450648] ? pointer+0x9e0/0x9e0 [ 34.455155] mount_fs+0x92/0x2a0 [ 34.458676] ? snprintf+0xa5/0xd0 [ 34.462025] vfs_kern_mount.part.0+0x5b/0x470 [ 34.465469] ? vsprintf+0x30/0x30 [ 34.469943] do_mount+0xe53/0x2a00 [ 34.473372] ? gfs2_open+0x160/0x160 [ 34.476888] ? do_raw_spin_unlock+0x164/0x220 [ 34.480591] ? set_blocksize+0x125/0x380 [ 34.485063] ? copy_mount_string+0x40/0x40 [ 34.489105] gfs2_mount+0x439/0x502 [ 34.493314] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 34.496944] ? fill_super+0x2310/0x2310 [ 34.502461] ? copy_mnt_ns+0xa30/0xa30 [ 34.506430] ? alloc_pages_current+0x15d/0x260 [ 34.510297] ? copy_mount_options+0x1fa/0x2f0 [ 34.514853] ? __lockdep_init_map+0x100/0x560 [ 34.519321] ? copy_mnt_ns+0xa30/0xa30 [ 34.523790] mount_fs+0x92/0x2a0 [ 34.527649] SyS_mount+0xa8/0x120 [ 34.530995] vfs_kern_mount.part.0+0x5b/0x470 [ 34.534418] ? copy_mnt_ns+0xa30/0xa30 [ 34.538900] do_mount+0xe53/0x2a00 [ 34.542769] do_syscall_64+0x1d5/0x640 [ 34.546318] ? copy_mount_string+0x40/0x40 [ 34.550181] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 34.554394] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 34.559555] RIP: 0033:0x45c57a [ 34.564545] ? copy_mnt_ns+0xa30/0xa30 [ 34.567715] RSP: 002b:00007ffc55f24a58 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 [ 34.571579] ? copy_mount_options+0x1fa/0x2f0 [ 34.571587] ? copy_mnt_ns+0xa30/0xa30 [ 34.579265] RAX: ffffffffffffffda RBX: 00007ffc55f24ab0 RCX: 000000000045c57a [ 34.583738] SyS_mount+0xa8/0x120 [ 34.587595] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc55f24a70 [ 34.594852] ? copy_mnt_ns+0xa30/0xa30 [ 34.598275] RBP: 00007ffc55f24a70 R08: 00007ffc55f24ab0 R09: 0000000000000000 [ 34.605547] do_syscall_64+0x1d5/0x640 [ 34.609402] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 34.616660] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 34.620511] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 34.627783] RIP: 0033:0x45c57a [ 34.632960] Code: [ 34.640202] RSP: 002b:00007ffc55f24a58 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5 [ 34.643380] f9 [ 34.645508] RAX: ffffffffffffffda RBX: 00007ffc55f24ab0 RCX: 000000000045c57a [ 34.653462] f1 [ 34.655332] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc55f24a70 [ 34.662579] 8b [ 34.664450] RBP: 00007ffc55f24a70 R08: 00007ffc55f24ab0 R09: 0000000000000000 [ 34.671698] e8 [ 34.673563] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 34.673569] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 34.680816] a9 06 db ff eb d8 e8 a2 06 db ff e9 6d ff ff ff e8 48 36 b1 ff 4c 89 ea 48 89 ee 48 c7 c7 20 a0 95 87 e8 47 c2 9f ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 b7 db da ff 90 90 90 90 90 90 [ 34.715049] ---[ end trace 31b5b1dd47e6e6a8 ]--- [ 34.720259] Kernel Offset: disabled [ 34.723929] Rebooting in 86400 seconds..