[ 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 '10.128.0.155' (ECDSA) to the list of known hosts. syzkaller login: [ 76.827008] audit: type=1400 audit(1597919051.194:8): avc: denied { execmem } for pid=6379 comm="syz-executor457" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 76.828477] FAULT_INJECTION: forcing a failure. [ 76.828477] name failslab, interval 1, probability 0, space 0, times 1 [ 76.860159] CPU: 1 PID: 6379 Comm: syz-executor457 Not tainted 4.14.193-syzkaller #0 [ 76.868058] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.877440] Call Trace: [ 76.880017] dump_stack+0x1b2/0x283 [ 76.883650] should_fail.cold+0x10a/0x154 [ 76.887812] should_failslab+0xd6/0x130 [ 76.891811] kmem_cache_alloc+0x28e/0x3c0 [ 76.895954] anon_vma_fork+0xe3/0x580 [ 76.899746] ? dup_userfaultfd+0x14a/0x5d0 [ 76.903990] ? kmem_cache_alloc+0x35f/0x3c0 [ 76.908325] copy_process.part.0+0x48db/0x6f00 [ 76.913054] ? __cleanup_sighand+0x40/0x40 [ 76.917305] ? lock_acquire+0x170/0x3f0 [ 76.921377] _do_fork+0x184/0xc80 [ 76.924824] ? fork_idle+0x270/0x270 [ 76.928531] ? _raw_spin_unlock_irq+0x5a/0x80 [ 76.933042] ? task_work_run+0xfd/0x190 [ 76.937030] ? do_syscall_64+0x4c/0x640 [ 76.941017] ? sys_vfork+0x20/0x20 [ 76.944553] do_syscall_64+0x1d5/0x640 [ 76.948450] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 76.953635] RIP: 0033:0x44431a [ 76.956824] RSP: 002b:00007ffc1561a5b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 76.964529] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000044431a [ 76.971881] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 76.979237] RBP: 00007ffc1561a5d0 R08: 0000000000000000 R09: 000000000126b880 [ 76.986492] R10: 000000000126bb50 R11: 0000000000000246 R12: 0000000000000000 [ 76.993757] R13: 0000000000402c20 R14: 0000000000000000 R15: 0000000000000000 [ 77.027329] IPVS: ftp: loaded support on port[0] = 21 [ 77.064950] IPVS: ftp: loaded support on port[0] = 21 [ 77.090129] FAULT_INJECTION: forcing a failure. [ 77.090129] name failslab, interval 1, probability 0, space 0, times 0 [ 77.105903] CPU: 0 PID: 6410 Comm: syz-executor457 Not tainted 4.14.193-syzkaller #0 [ 77.113811] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.123167] Call Trace: [ 77.125757] dump_stack+0x1b2/0x283 [ 77.129408] should_fail.cold+0x10a/0x154 [ 77.133565] should_failslab+0xd6/0x130 [ 77.137546] kmem_cache_alloc+0x28e/0x3c0 [ 77.141700] alloc_buffer_head+0x20/0x110 [ 77.144347] FAULT_INJECTION: forcing a failure. [ 77.144347] name failslab, interval 1, probability 0, space 0, times 0 [ 77.145851] alloc_page_buffers+0xb3/0x1f0 [ 77.145864] __getblk_slow+0x2d6/0x7a0 [ 77.145876] ? vfat_rename.cold+0x61/0x61 [ 77.145888] __bread_gfp+0x206/0x2e0 [ 77.173216] fat_fill_super+0x2f9/0x31b0 [ 77.177295] ? vsnprintf+0x260/0x1340 [ 77.181113] ? fat_write_end+0x280/0x280 [ 77.185189] ? lock_downgrade+0x740/0x740 [ 77.189348] ? snprintf+0xa5/0xd0 [ 77.192808] ? vsprintf+0x30/0x30 [ 77.196277] ? ns_test_super+0x50/0x50 [ 77.200171] ? set_blocksize+0x125/0x380 [ 77.204246] mount_bdev+0x2b3/0x360 [ 77.207883] ? msdos_mount+0x40/0x40 [ 77.211606] mount_fs+0x92/0x2a0 [ 77.214984] vfs_kern_mount.part.0+0x5b/0x470 [ 77.219490] do_mount+0xe53/0x2a00 [ 77.223042] ? do_raw_spin_unlock+0x164/0x220 [ 77.227555] ? copy_mount_string+0x40/0x40 [ 77.231811] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 77.236968] ? copy_mnt_ns+0xa30/0xa30 [ 77.240885] ? copy_mount_options+0x1fa/0x2f0 [ 77.245383] ? copy_mnt_ns+0xa30/0xa30 [ 77.249323] SyS_mount+0xa8/0x120 [ 77.252773] ? copy_mnt_ns+0xa30/0xa30 [ 77.256661] do_syscall_64+0x1d5/0x640 [ 77.260568] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 77.265755] RIP: 0033:0x4484ca [ 77.268942] RSP: 002b:00007ffc1561a3d8 EFLAGS: 00000287 ORIG_RAX: 00000000000000a5 [ 77.276917] RAX: ffffffffffffffda RBX: 00007ffc1561a460 RCX: 00000000004484ca [ 77.284294] RDX: 00000000200000c0 RSI: 00000000200003c0 RDI: 00007ffc1561a420 [ 77.292676] RBP: 0000000000000006 R08: 00007ffc1561a460 R09: 0000000000000000 [ 77.300423] R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000001 [ 77.307873] R13: 0000000000000005 R14: 0000000000000005 R15: 0000000000000001 [ 77.315160] CPU: 1 PID: 6425 Comm: syz-executor457 Not tainted 4.14.193-syzkaller #0 [ 77.323085] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.332448] Call Trace: [ 77.335074] dump_stack+0x1b2/0x283 [ 77.338712] should_fail.cold+0x10a/0x154 [ 77.342870] should_failslab+0xd6/0x130 [ 77.346877] __kmalloc+0x2c1/0x400 [ 77.350451] ? register_shrinker+0x1ab/0x220 [ 77.354871] register_shrinker+0x1ab/0x220 [ 77.357065] FAT-fs (loop4): bogus number of reserved sectors [ 77.359219] sget_userns+0x9aa/0xc10 [ 77.359227] ? set_bdev_super+0x110/0x110 [ 77.359237] ? ns_test_super+0x50/0x50 [ 77.359245] ? set_bdev_super+0x110/0x110 [ 77.359251] ? ns_test_super+0x50/0x50 [ 77.359261] sget+0xd1/0x110 [ 77.381466] FAT-fs (loop4): Can't find a valid FAT filesystem [ 77.384964] mount_bdev+0xcd/0x360 [ 77.384972] ? msdos_mount+0x40/0x40 [ 77.384981] mount_fs+0x92/0x2a0 [ 77.384992] vfs_kern_mount.part.0+0x5b/0x470 [ 77.385002] do_mount+0xe53/0x2a00 [ 77.385013] ? do_raw_spin_unlock+0x164/0x220 [ 77.417060] ? copy_mount_string+0x40/0x40 [ 77.421294] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 77.426298] ? copy_mnt_ns+0xa30/0xa30 [ 77.430192] ? copy_mount_options+0x1fa/0x2f0 [ 77.434733] ? copy_mnt_ns+0xa30/0xa30 [ 77.438602] SyS_mount+0xa8/0x120 [ 77.442038] ? copy_mnt_ns+0xa30/0xa30 [ 77.445910] do_syscall_64+0x1d5/0x640 [ 77.449794] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 77.455588] RIP: 0033:0x4484ca [ 77.458772] RSP: 002b:00007ffc1561a3d8 EFLAGS: 00000287 ORIG_RAX: 00000000000000a5 [ 77.466482] RAX: ffffffffffffffda RBX: 00007ffc1561a460 RCX: 00000000004484ca [ 77.473743] RDX: 00000000200000c0 RSI: 00000000200003c0 RDI: 00007ffc1561a420 [ 77.481007] RBP: 0000000000000006 R08: 00007ffc1561a460 R09: 0000000000000000 [ 77.488270] R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000001 [ 77.495536] R13: 0000000000000005 R14: 0000000000000005 R15: 0000000000000001 [ 77.505077] IPVS: ftp: loaded support on port[0] = 21 [ 77.506471] ------------[ cut here ]------------ [ 77.515188] WARNING: CPU: 0 PID: 6425 at fs/super.c:1163 kill_block_super+0xbe/0xe0 [ 77.523218] Kernel panic - not syncing: panic_on_warn set ... [ 77.523218] [ 77.530587] CPU: 0 PID: 6425 Comm: syz-executor457 Not tainted 4.14.193-syzkaller #0 [ 77.538466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.547993] Call Trace: [ 77.550592] dump_stack+0x1b2/0x283 [ 77.554207] panic+0x1f9/0x42d [ 77.557388] ? add_taint.cold+0x16/0x16 [ 77.561358] ? kill_block_super+0xbe/0xe0 [ 77.565487] ? kill_block_super+0xbe/0xe0 [ 77.569615] __warn.cold+0x20/0x4b [ 77.573148] ? ist_end_non_atomic+0x10/0x10 [ 77.577481] ? kill_block_super+0xbe/0xe0 [ 77.581721] report_bug+0x208/0x249 [ 77.585332] do_error_trap+0x195/0x2d0 [ 77.589197] ? math_error+0x2d0/0x2d0 [ 77.592980] ? __filemap_fdatawait_range+0x254/0x2e0 [ 77.598093] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 77.602927] invalid_op+0x1b/0x40 [ 77.606362] RIP: 0010:kill_block_super+0xbe/0xe0 [ 77.611092] RSP: 0018:ffff888098327bc8 EFLAGS: 00010297 [ 77.616436] RAX: ffff8880960de1c0 RBX: 0000000000000000 RCX: 1ffff11013064f58 [ 77.623812] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff8880a6a5a5f0 [ 77.631114] RBP: ffff888097054540 R08: ffff8880aea2beb0 R09: 0000000000000001 [ 77.638372] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a6a5a140 [ 77.645629] R13: ffffffff87eb4b90 R14: ffffffff87d536a0 R15: dffffc0000000000 [ 77.652902] ? kill_block_super+0xbe/0xe0 [ 77.657046] deactivate_locked_super+0x6c/0xd0 [ 77.661647] sget_userns+0x9c4/0xc10 [ 77.665350] ? set_bdev_super+0x110/0x110 [ 77.669503] ? ns_test_super+0x50/0x50 [ 77.673379] ? set_bdev_super+0x110/0x110 [ 77.677530] ? ns_test_super+0x50/0x50 [ 77.681407] sget+0xd1/0x110 [ 77.684430] mount_bdev+0xcd/0x360 [ 77.687961] ? msdos_mount+0x40/0x40 [ 77.691661] mount_fs+0x92/0x2a0 [ 77.695028] vfs_kern_mount.part.0+0x5b/0x470 [ 77.699512] do_mount+0xe53/0x2a00 [ 77.703074] ? do_raw_spin_unlock+0x164/0x220 [ 77.707560] ? copy_mount_string+0x40/0x40 [ 77.711791] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 77.716799] ? copy_mnt_ns+0xa30/0xa30 [ 77.720805] ? copy_mount_options+0x1fa/0x2f0 [ 77.725288] ? copy_mnt_ns+0xa30/0xa30 [ 77.729174] SyS_mount+0xa8/0x120 [ 77.732610] ? copy_mnt_ns+0xa30/0xa30 [ 77.736482] do_syscall_64+0x1d5/0x640 [ 77.740374] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 77.746787] RIP: 0033:0x4484ca [ 77.749962] RSP: 002b:00007ffc1561a3d8 EFLAGS: 00000287 ORIG_RAX: 00000000000000a5 [ 77.757657] RAX: ffffffffffffffda RBX: 00007ffc1561a460 RCX: 00000000004484ca [ 77.764938] RDX: 00000000200000c0 RSI: 00000000200003c0 RDI: 00007ffc1561a420 [ 77.772409] RBP: 0000000000000006 R08: 00007ffc1561a460 R09: 0000000000000000 [ 77.779869] R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000001 [ 77.791836] R13: 0000000000000005 R14: 0000000000000005 R15: 0000000000000001 [ 77.800477] Kernel Offset: disabled [ 77.804167] Rebooting in 86400 seconds..