[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.20' (ECDSA) to the list of known hosts. syzkaller login: [ 28.474569] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 28.506340] gfs2: fsid=syz:syz: Now mounting FS... [ 28.509849] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.518764] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.520551] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.527963] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.534907] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 28.545682] ------------[ cut here ]------------ [ 28.550129] ------------[ cut here ]------------ [ 28.550441] WARNING: CPU: 0 PID: 8006 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 28.555168] WARNING: CPU: 1 PID: 8005 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 28.563366] Kernel panic - not syncing: panic_on_warn set ... [ 28.563366] [ 28.571566] Modules linked in: [ 28.578900] CPU: 0 PID: 8006 Comm: syz-executor921 Not tainted 4.14.215-syzkaller #0 [ 28.578908] CPU: 1 PID: 8005 Comm: syz-executor921 Not tainted 4.14.215-syzkaller #0 [ 28.582068] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.582073] Call Trace: [ 28.589926] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.597784] dump_stack+0x1b2/0x283 [ 28.607106] task: ffff888095a42380 task.stack: ffff888095ae0000 [ 28.609756] panic+0x1f9/0x42d [ 28.619080] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 28.622688] ? add_taint.cold+0x16/0x16 [ 28.628713] RSP: 0018:ffff888095ae7728 EFLAGS: 00010282 [ 28.631886] ? sysfs_warn_dup.cold+0x17/0x2d [ 28.640819] ? sysfs_warn_dup.cold+0x17/0x2d [ 28.646146] RAX: 000000000000003a RBX: ffff8880b1984e10 RCX: 0000000000000000 [ 28.646153] RDX: 0000000000000000 RSI: ffffffff878bbb40 RDI: ffffed1012b5cedb [ 28.650534] __warn.cold+0x20/0x4b [ 28.654910] RBP: ffff8880b101a800 R08: 000000000000003a R09: 0000000000000000 [ 28.662158] ? ist_end_non_atomic+0x10/0x10 [ 28.669398] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238e68d20 [ 28.669405] R13: ffff8880b2b154c0 R14: ffff8880b1984e18 R15: ffff8880b2a70dd8 [ 28.672922] ? sysfs_warn_dup.cold+0x17/0x2d [ 28.680167] FS: 0000000000e59880(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 28.684461] report_bug+0x208/0x249 [ 28.691703] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.698962] do_error_trap+0x195/0x2d0 [ 28.703338] CR2: 000055d7244aa0d8 CR3: 0000000097825000 CR4: 00000000001406e0 [ 28.711552] ? math_error+0x2d0/0x2d0 [ 28.715149] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.721017] ? ___preempt_schedule+0x16/0x18 [ 28.724873] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.732124] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.735889] Call Trace: [ 28.743670] invalid_op+0x1b/0x40 [ 28.748076] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.755328] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 28.760144] kobject_add_internal+0x28b/0x930 [ 28.762698] RSP: 0018:ffff8880b2c07728 EFLAGS: 00010282 [ 28.766139] kobject_init_and_add+0xde/0x120 [ 28.775503] ? kobject_create_and_add+0x200/0x200 [ 28.779968] RAX: 000000000000003a RBX: ffff8880b2a70dd0 RCX: 0000000000000000 [ 28.785307] ? vsnprintf+0x260/0x1340 [ 28.789685] RDX: 0000000000000000 RSI: ffffffff878bbb40 RDI: ffffed1016580edb [ 28.794680] gfs2_sys_fs_add+0x184/0x3f0 [ 28.801919] RBP: ffff88809114c240 R08: 000000000000003a R09: 0000000000000000 [ 28.805694] ? recover_store+0x100/0x100 [ 28.812936] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238e68d20 [ 28.816979] ? snprintf+0xa5/0xd0 [ 28.824221] R13: ffff8880b192c3c0 R14: ffff8880b2a70dd8 R15: ffff8880b2a58d98 [ 28.828263] ? memcpy+0x35/0x50 [ 28.836295] ? sysfs_warn_dup.cold+0x17/0x2d [ 28.839718] fill_super+0x118b/0x2310 [ 28.846963] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.850229] ? vsnprintf+0x260/0x1340 [ 28.854608] kobject_add_internal+0x28b/0x930 [ 28.858382] ? gfs2_online_uevent+0x1b0/0x1b0 [ 28.862764] kobject_init_and_add+0xde/0x120 [ 28.866546] ? pointer+0x9e0/0x9e0 [ 28.871015] ? kobject_create_and_add+0x200/0x200 [ 28.875497] ? snprintf+0xa5/0xd0 [ 28.879879] ? vsnprintf+0x260/0x1340 [ 28.883388] ? vsprintf+0x30/0x30 [ 28.888205] gfs2_sys_fs_add+0x184/0x3f0 [ 28.891626] ? gfs2_open+0x160/0x160 [ 28.895396] ? recover_store+0x100/0x100 [ 28.898913] ? set_blocksize+0x125/0x380 [ 28.902948] ? snprintf+0xa5/0xd0 [ 28.906638] gfs2_mount+0x439/0x502 [ 28.910674] ? memcpy+0x35/0x50 [ 28.914705] ? fill_super+0x2310/0x2310 [ 28.918134] fill_super+0x118b/0x2310 [ 28.921750] ? alloc_pages_current+0x15d/0x260 [ 28.924993] ? vsnprintf+0x260/0x1340 [ 28.928941] ? __lockdep_init_map+0x100/0x560 [ 28.932731] ? gfs2_online_uevent+0x1b0/0x1b0 [ 28.937287] mount_fs+0x92/0x2a0 [ 28.941060] ? pointer+0x9e0/0x9e0 [ 28.945534] vfs_kern_mount.part.0+0x5b/0x470 [ 28.950005] ? snprintf+0xa5/0xd0 [ 28.953370] do_mount+0xe53/0x2a00 [ 28.956881] ? vsprintf+0x30/0x30 [ 28.961356] ? copy_mount_string+0x40/0x40 [ 28.964780] ? gfs2_open+0x160/0x160 [ 28.968314] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.971759] ? set_blocksize+0x125/0x380 [ 28.975968] ? copy_mnt_ns+0xa30/0xa30 [ 28.979657] gfs2_mount+0x439/0x502 [ 28.984671] ? copy_mount_options+0x1fa/0x2f0 [ 28.988705] ? fill_super+0x2310/0x2310 [ 28.992564] ? copy_mnt_ns+0xa30/0xa30 [ 28.996186] ? alloc_pages_current+0x15d/0x260 [ 29.000644] SyS_mount+0xa8/0x120 [ 29.004592] ? __lockdep_init_map+0x100/0x560 [ 29.008453] ? copy_mnt_ns+0xa30/0xa30 [ 29.013010] mount_fs+0x92/0x2a0 [ 29.016440] do_syscall_64+0x1d5/0x640 [ 29.020911] vfs_kern_mount.part.0+0x5b/0x470 [ 29.024783] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.028122] do_mount+0xe53/0x2a00 [ 29.031999] RIP: 0033:0x45c56a [ 29.036473] ? copy_mount_string+0x40/0x40 [ 29.041631] RSP: 002b:00007ffeb9240e28 EFLAGS: 00000293 [ 29.045148] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 29.048328] ORIG_RAX: 00000000000000a5 [ 29.052542] ? copy_mnt_ns+0xa30/0xa30 [ 29.057903] RAX: ffffffffffffffda RBX: 00007ffeb9240e80 RCX: 000000000045c56a [ 29.062894] ? copy_mount_options+0x1fa/0x2f0 [ 29.066841] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffeb9240e40 [ 29.070708] ? copy_mnt_ns+0xa30/0xa30 [ 29.077951] RBP: 00007ffeb9240e40 R08: 00007ffeb9240e80 R09: 0000000000000000 [ 29.082447] SyS_mount+0xa8/0x120 [ 29.089704] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 29.093568] ? copy_mnt_ns+0xa30/0xa30 [ 29.100809] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 29.100821] Code: [ 29.104248] do_syscall_64+0x1d5/0x640 [ 29.111491] 29 [ 29.115360] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.122616] f2 [ 29.124747] RIP: 0033:0x45c56a [ 29.128605] 8b [ 29.130473] RSP: 002b:00007ffeb9240e28 EFLAGS: 00000293 [ 29.135635] e8 [ 29.137502] ORIG_RAX: 00000000000000a5 [ 29.140669] 79 [ 29.142536] RAX: ffffffffffffffda RBX: 00007ffeb9240e80 RCX: 000000000045c56a [ 29.147886] 05 [ 29.149763] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffeb9240e40 [ 29.153708] db [ 29.155575] RBP: 00007ffeb9240e40 R08: 00007ffeb9240e80 R09: 0000000000000000 [ 29.162832] ff [ 29.164703] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 29.171946] eb [ 29.173813] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 29.181060] d8 e8 72 05 db ff e9 6d ff ff ff e8 e8 18 b1 ff 4c 89 ea 48 89 ee 48 c7 c7 e0 a8 95 87 e8 a7 a5 9f ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 87 da da ff 90 90 90 90 90 90 [ 29.215591] ---[ end trace 2fd0c449f3182e55 ]--- [ 29.220980] Kernel Offset: disabled [ 29.224637] Rebooting in 86400 seconds..