[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.9' (ECDSA) to the list of known hosts. syzkaller login: [ 32.905294] audit: type=1400 audit(1601630001.546:8): avc: denied { execmem } for pid=6340 comm="syz-executor971" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 32.969863] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 32.970686] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 32.979636] sysfs: cannot create duplicate filename '/fs/gfs2/syz:syz' [ 32.995705] ------------[ cut here ]------------ [ 33.000761] WARNING: CPU: 1 PID: 6353 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 33.009320] Kernel panic - not syncing: panic_on_warn set ... [ 33.009320] [ 33.012017] ------------[ cut here ]------------ [ 33.016888] CPU: 1 PID: 6353 Comm: syz-executor971 Not tainted 4.14.198-syzkaller #0 [ 33.021989] WARNING: CPU: 0 PID: 6349 at fs/sysfs/dir.c:30 sysfs_warn_dup.cold+0x17/0x2d [ 33.030252] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.038496] Modules linked in: [ 33.048070] Call Trace: [ 33.048093] dump_stack+0x1b2/0x283 [ 33.054721] panic+0x1f9/0x42d [ 33.058427] CPU: 0 PID: 6349 Comm: syz-executor971 Not tainted 4.14.198-syzkaller #0 [ 33.061900] ? add_taint.cold+0x16/0x16 [ 33.070037] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.074154] ? sysfs_warn_dup.cold+0x17/0x2d [ 33.083857] task: ffff888097a9e140 task.stack: ffff888097600000 [ 33.088483] ? sysfs_warn_dup.cold+0x17/0x2d [ 33.094899] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 33.099315] __warn.cold+0x20/0x4b [ 33.104699] RSP: 0018:ffff888097607728 EFLAGS: 00010282 [ 33.108648] ? ist_end_non_atomic+0x10/0x10 [ 33.108661] ? sysfs_warn_dup.cold+0x17/0x2d [ 33.108671] report_bug+0x208/0x249 [ 33.108682] do_error_trap+0x195/0x2d0 [ 33.108691] ? math_error+0x2d0/0x2d0 [ 33.118648] ? ___preempt_schedule+0x16/0x18 [ 33.123054] RAX: 000000000000003a RBX: ffff888097aa4850 RCX: 0000000000000000 [ 33.126695] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.130819] RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed1012ec0edb [ 33.134632] invalid_op+0x1b/0x40 [ 33.139119] RBP: ffff888097a68cc0 R08: 000000000000003a R09: 0000000000000000 [ 33.146780] RIP: 0010:sysfs_warn_dup.cold+0x17/0x2d [ 33.151942] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a63877e0 [ 33.161143] RSP: 0018:ffff8880982ef728 EFLAGS: 00010282 [ 33.164911] R13: ffff8880a8e3f4c0 R14: ffff888097aa4870 R15: ffff88808a260898 [ 33.178709] FS: 000000000107b880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 33.186428] RAX: 000000000000003a RBX: ffff8880974508d0 RCX: 0000000000000000 [ 33.186437] RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed101305dedb [ 33.192643] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.200643] RBP: ffff888097bbae00 R08: 000000000000003a R09: 0000000000000000 [ 33.209443] CR2: 0000563e1954ca80 CR3: 00000000a8402000 CR4: 00000000001406f0 [ 33.217138] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a63877e0 [ 33.225164] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.231576] R13: ffff88809b165d40 R14: ffff8880974508f0 R15: ffff888097aa4858 [ 33.239721] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.247499] ? sysfs_warn_dup.cold+0x17/0x2d [ 33.255805] Call Trace: [ 33.264047] sysfs_create_dir_ns+0x16f/0x1d0 [ 33.271853] sysfs_create_dir_ns+0x16f/0x1d0 [ 33.279910] kobject_add_internal+0x279/0x810 [ 33.284939] kobject_add_internal+0x279/0x810 [ 33.287784] kobject_init_and_add+0xde/0x120 [ 33.294506] kobject_init_and_add+0xde/0x120 [ 33.299218] ? kobject_create_and_add+0x200/0x200 [ 33.304465] ? kobject_create_and_add+0x200/0x200 [ 33.309473] ? vsnprintf+0x260/0x1340 [ 33.314537] ? vsnprintf+0x260/0x1340 [ 33.319197] gfs2_sys_fs_add+0x184/0x3f0 [ 33.324043] gfs2_sys_fs_add+0x184/0x3f0 [ 33.329396] ? recover_store+0x100/0x100 [ 33.333590] ? recover_store+0x100/0x100 [ 33.338144] ? snprintf+0xa5/0xd0 [ 33.342208] ? snprintf+0xa5/0xd0 [ 33.346400] ? memcpy+0x35/0x50 [ 33.350689] ? memcpy+0x35/0x50 [ 33.354813] fill_super+0x118b/0x2310 [ 33.358450] fill_super+0x118b/0x2310 [ 33.362099] ? vsnprintf+0x260/0x1340 [ 33.365564] ? vsnprintf+0x260/0x1340 [ 33.368861] ? gfs2_online_uevent+0x1b0/0x1b0 [ 33.372905] ? gfs2_online_uevent+0x1b0/0x1b0 [ 33.377013] ? pointer+0x9e0/0x9e0 [ 33.380902] ? pointer+0x9e0/0x9e0 [ 33.384705] ? snprintf+0xa5/0xd0 [ 33.389222] ? snprintf+0xa5/0xd0 [ 33.394084] ? vsprintf+0x30/0x30 [ 33.398118] ? vsprintf+0x30/0x30 [ 33.402072] ? gfs2_open+0x160/0x160 [ 33.405806] ? gfs2_open+0x160/0x160 [ 33.409428] ? set_blocksize+0x125/0x380 [ 33.413124] ? set_blocksize+0x125/0x380 [ 33.417221] gfs2_mount+0x439/0x502 [ 33.421198] gfs2_mount+0x439/0x502 [ 33.424910] ? fill_super+0x2310/0x2310 [ 33.429186] ? fill_super+0x2310/0x2310 [ 33.433609] mount_fs+0x92/0x2a0 [ 33.437752] mount_fs+0x92/0x2a0 [ 33.441732] vfs_kern_mount.part.0+0x5b/0x470 [ 33.446278] vfs_kern_mount.part.0+0x5b/0x470 [ 33.450465] do_mount+0xe53/0x2a00 [ 33.453995] do_mount+0xe53/0x2a00 [ 33.457623] ? retint_kernel+0x2d/0x2d [ 33.462493] ? copy_mount_string+0x40/0x40 [ 33.467639] ? copy_mount_string+0x40/0x40 [ 33.471320] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.475301] ? copy_mount_options+0x197/0x2f0 [ 33.480242] ? copy_mnt_ns+0xa30/0xa30 [ 33.484658] ? copy_mount_options+0x1fa/0x2f0 [ 33.489433] ? copy_mount_options+0x1fa/0x2f0 [ 33.494645] ? copy_mnt_ns+0xa30/0xa30 [ 33.499626] ? copy_mnt_ns+0xa30/0xa30 [ 33.503528] SyS_mount+0xa8/0x120 [ 33.508537] SyS_mount+0xa8/0x120 [ 33.513477] ? copy_mnt_ns+0xa30/0xa30 [ 33.517601] ? copy_mnt_ns+0xa30/0xa30 [ 33.521493] do_syscall_64+0x1d5/0x640 [ 33.524946] do_syscall_64+0x1d5/0x640 [ 33.528616] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 33.532769] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 33.536826] RIP: 0033:0x45c57a [ 33.540851] RIP: 0033:0x45c57a [ 33.544947] RSP: 002b:00007ffc49936568 EFLAGS: 00000293 [ 33.550265] RSP: 002b:00007ffc49936568 EFLAGS: 00000293 [ 33.555579] ORIG_RAX: 00000000000000a5 [ 33.559127] ORIG_RAX: 00000000000000a5 [ 33.562506] RAX: ffffffffffffffda RBX: 00007ffc499365c0 RCX: 000000000045c57a [ 33.568406] RAX: ffffffffffffffda RBX: 00007ffc499365c0 RCX: 000000000045c57a [ 33.574325] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc49936580 [ 33.578555] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc49936580 [ 33.582885] RBP: 00007ffc49936580 R08: 00007ffc499365c0 R09: 0000000000000000 [ 33.590685] RBP: 00007ffc49936580 R08: 00007ffc499365c0 R09: 0000000000000000 [ 33.599481] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 33.607510] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000091c [ 33.615196] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 33.622930] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 33.622946] Code: 56 61 8a e8 59 41 db ff eb d8 e8 52 41 db ff e9 6d ff ff ff e8 08 6e b1 ff 4c 89 ea 48 89 ee 48 c7 c7 a0 9d b5 86 e8 57 0d a0 ff <0f> 0b 48 89 ef 5d 41 5c 41 5d e9 67 16 db ff 90 90 90 90 90 90 [ 33.683840] ---[ end trace 23636f5ef39101d9 ]--- [ 33.690905] Kernel Offset: disabled [ 33.695297] Rebooting in 86400 seconds..