Starting Update UTMP about System Runlevel Changes... [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ 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 '10.128.1.121' (ECDSA) to the list of known hosts. syzkaller login: [ 28.211369] gfs2: fsid=user.incfs.id: Trying to join cluster "lock_nolock", "user.incfs.id" [ 28.225147] sysfs: cannot create duplicate filename '/fs/gfs2/user.incfs.id' [ 28.232298] sysfs: cannot create duplicate filename '/fs/gfs2/user.incfs.id' [ 28.233685] gfs2: fsid=user.incfs.id: Now mounting FS... [ 28.251799] sysfs: cannot create duplicate filename '/fs/gfs2/user.incfs.id' [ 28.252066] sysfs: cannot create duplicate filename '/fs/gfs2/user.incfs.id' [ 28.261919] sysfs: cannot create duplicate filename '/fs/gfs2/user.incfs.id' [ 28.269937] ------------[ cut here ]------------ [ 28.274113] ------------[ cut here ]------------ [ 28.278226] WARNING: CPU: 1 PID: 7976 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.282959] WARNING: CPU: 0 PID: 7978 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x26 [ 28.291155] Kernel panic - not syncing: panic_on_warn set ... [ 28.291155] [ 28.299356] Modules linked in: [ 28.306691] CPU: 1 PID: 7976 Comm: syz-executor217 Not tainted 4.14.279-syzkaller #0 [ 28.306700] CPU: 0 PID: 7978 Comm: syz-executor217 Not tainted 4.14.279-syzkaller #0 [ 28.309862] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.317715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.325568] Call Trace: [ 28.334906] task: ffff888095fe8240 task.stack: ffff8880b3580000 [ 28.344245] dump_stack+0x1b2/0x281 [ 28.346798] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.352830] panic+0x1f9/0x42d [ 28.356428] RSP: 0018:ffff8880b3587728 EFLAGS: 00010282 [ 28.361423] ? add_taint.cold+0x16/0x16 [ 28.369930] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.373872] RAX: 0000000000000040 RBX: ffff888096bf1910 RCX: 0000000000000000 [ 28.373878] RDX: 0000000000000000 RSI: ffffffff878bc600 RDI: ffffed10166b0edb [ 28.378262] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.385507] RBP: ffff8880b48ea9c0 R08: 0000000000000040 R09: 0000000000000000 [ 28.392760] __warn.cold+0x20/0x44 [ 28.397140] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238ed6c40 [ 28.404391] ? ist_end_non_atomic+0x10/0x10 [ 28.407901] R13: ffff8880b3e963c0 R14: ffff888096bf1918 R15: ffff8880a08d1658 [ 28.415149] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.419444] FS: 00005555568bb300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 28.426692] report_bug+0x208/0x250 [ 28.431074] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.439283] do_error_trap+0x195/0x2d0 [ 28.442881] CR2: 00007fff3b440000 CR3: 000000009aa28000 CR4: 00000000003406f0 [ 28.448742] ? math_error+0x2d0/0x2d0 [ 28.452603] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.459852] ? ___preempt_schedule+0x16/0x18 [ 28.463621] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.463625] Call Trace: [ 28.470879] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.475261] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.482510] invalid_op+0x1b/0x40 [ 28.485074] kobject_add_internal+0x28b/0x930 [ 28.489895] RIP: 0010:sysfs_warn_dup.cold+0x17/0x26 [ 28.494281] kobject_init_and_add+0xde/0x120 [ 28.497704] RSP: 0018:ffff8880b3f27728 EFLAGS: 00010282 [ 28.502177] ? kobject_create_and_add+0x200/0x200 [ 28.511556] ? vsnprintf+0x260/0x1340 [ 28.516890] RAX: 0000000000000040 RBX: ffff888095a41950 RCX: 0000000000000000 [ 28.521712] gfs2_sys_fs_add+0x184/0x3f0 [ 28.525482] RDX: 0000000000000000 RSI: ffffffff878bc600 RDI: ffffed10167e4edb [ 28.532729] ? recover_store+0x100/0x100 [ 28.536761] RBP: ffff8880ab0f0d40 R08: 0000000000000040 R09: 0000000000000000 [ 28.544015] ? snprintf+0xa5/0xd0 [ 28.548051] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238ed6c40 [ 28.555296] ? filemap_write_and_wait+0x86/0xa0 [ 28.558718] R13: ffff8880b4fd6140 R14: ffff888095a41958 R15: ffff888096bf1918 [ 28.565967] ? memcpy+0x35/0x50 [ 28.570619] ? sysfs_warn_dup.cold+0x17/0x26 [ 28.577859] fill_super+0x118b/0x2310 [ 28.581114] sysfs_create_dir_ns+0x16f/0x1d0 [ 28.585501] ? vsnprintf+0x260/0x1340 [ 28.589274] kobject_add_internal+0x28b/0x930 [ 28.593656] ? gfs2_online_uevent+0x1b0/0x1b0 [ 28.597433] kobject_init_and_add+0xde/0x120 [ 28.601900] ? memcpy+0x35/0x50 [ 28.606375] ? kobject_create_and_add+0x200/0x200 [ 28.610757] ? pointer+0x9e0/0x9e0 [ 28.614012] ? vsnprintf+0x260/0x1340 [ 28.618833] ? snprintf+0xa5/0xd0 [ 28.622348] gfs2_sys_fs_add+0x184/0x3f0 [ 28.626123] ? vsprintf+0x30/0x30 [ 28.629552] ? recover_store+0x100/0x100 [ 28.633588] ? set_blocksize+0x125/0x380 [ 28.637015] ? snprintf+0xa5/0xd0 [ 28.641054] gfs2_mount+0x439/0x510 [ 28.645094] ? filemap_write_and_wait+0x86/0xa0 [ 28.648522] ? fill_super+0x2310/0x2310 [ 28.652125] ? memcpy+0x35/0x50 [ 28.656781] ? alloc_pages_current+0x15d/0x260 [ 28.660719] fill_super+0x118b/0x2310 [ 28.663979] ? __lockdep_init_map+0x100/0x560 [ 28.668540] ? vsnprintf+0x260/0x1340 [ 28.672316] mount_fs+0x92/0x2a0 [ 28.676784] ? gfs2_online_uevent+0x1b0/0x1b0 [ 28.680561] vfs_kern_mount.part.0+0x5b/0x470 [ 28.683902] ? memcpy+0x35/0x50 [ 28.688372] do_mount+0xe65/0x2a30 [ 28.692838] ? pointer+0x9e0/0x9e0 [ 28.696094] ? retint_kernel+0x2d/0x2d [ 28.699612] ? snprintf+0xa5/0xd0 [ 28.703127] ? copy_mount_string+0x40/0x40 [ 28.706987] ? vsprintf+0x30/0x30 [ 28.710415] ? memset+0x20/0x40 [ 28.714624] ? set_blocksize+0x125/0x380 [ 28.718054] ? copy_mount_options+0x1fa/0x2f0 [ 28.721307] gfs2_mount+0x439/0x510 [ 28.725355] ? copy_mnt_ns+0xa30/0xa30 [ 28.729832] ? fill_super+0x2310/0x2310 [ 28.733438] SyS_mount+0xa8/0x120 [ 28.737316] ? alloc_pages_current+0x15d/0x260 [ 28.741343] ? copy_mnt_ns+0xa30/0xa30 [ 28.744772] ? __lockdep_init_map+0x100/0x560 [ 28.749327] do_syscall_64+0x1d5/0x640 [ 28.753185] mount_fs+0x92/0x2a0 [ 28.757658] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.761518] vfs_kern_mount.part.0+0x5b/0x470 [ 28.764856] RIP: 0033:0x7f6e0af9eb6a [ 28.770021] do_mount+0xe65/0x2a30 [ 28.774484] RSP: 002b:00007fff3b43f818 EFLAGS: 00000282 [ 28.778177] ? retint_kernel+0x2d/0x2d [ 28.781685] ORIG_RAX: 00000000000000a5 [ 28.787025] ? copy_mount_string+0x40/0x40 [ 28.790883] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6e0af9eb6a [ 28.794843] ? memset+0x20/0x40 [ 28.799046] RDX: 0000000020000140 RSI: 0000000020000180 RDI: 00007fff3b43f820 [ 28.806295] ? copy_mount_options+0x1fa/0x2f0 [ 28.809544] RBP: 00007fff3b43f820 R08: 00007fff3b43f860 R09: 0000000000000002 [ 28.816794] ? copy_mnt_ns+0xa30/0xa30 [ 28.821256] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 28.821262] R13: 0000000000000000 R14: 00007fff3b43f860 R15: 00007fff3b43f9b0 [ 28.828516] SyS_mount+0xa8/0x120 [ 28.832383] Code: [ 28.839631] ? copy_mnt_ns+0xa30/0xa30 [ 28.846871] bd [ 28.850302] do_syscall_64+0x1d5/0x640 [ 28.852421] ea [ 28.856292] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.858148] ff [ 28.862011] RIP: 0033:0x7f6e0af9eb6a [ 28.863871] ff [ 28.869032] RSP: 002b:00007fff3b43f818 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 28.870901] ff [ 28.874593] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6e0af9eb6a [ 28.876452] e9 [ 28.884147] RDX: 0000000020000140 RSI: 0000000020000180 RDI: 00007fff3b43f820 [ 28.886016] 84 [ 28.893266] RBP: 00007fff3b43f820 R08: 00007fff3b43f860 R09: 0000000000000002 [ 28.895129] e4 [ 28.902380] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 28.904242] 9f [ 28.911492] R13: 0000000000000000 R14: 00007fff3b43f860 R15: 00007fff3b43f9b0 [ 28.913381] fa 4c 89 ff e8 59 0e 7b fa eb da e8 32 56 51 fa 4c 89 ea 48 89 ee 48 c7 c7 40 b8 95 87 e8 88 fc fe ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 01 e4 7a fa e8 0c 56 51 fa 4d [ 28.946109] ---[ end trace 88e0074c82d1bbe0 ]--- [ 28.951023] Kernel Offset: disabled [ 28.954688] Rebooting in 86400 seconds..