[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 27.833266] kauditd_printk_skb: 7 callbacks suppressed [ 27.833281] audit: type=1800 audit(1541581367.884:29): pid=5561 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 27.865506] audit: type=1800 audit(1541581367.884:30): pid=5561 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.101' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.331119] kasan: CONFIG_KASAN_INLINE enabled [ 45.335801] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.343261] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.349505] CPU: 0 PID: 5717 Comm: syz-executor347 Not tainted 4.20.0-rc1-next-20181107+ #107 [ 45.358150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.367514] RIP: 0010:__x86_indirect_thunk_rbx+0x10/0x20 [ 45.372954] Code: 90 0f ae e8 eb f9 48 89 04 24 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 90 0f ae e8 eb f9 48 89 1c 24 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 [ 45.391844] RSP: 0018:ffff8801b9a1f2b0 EFLAGS: 00010293 [ 45.397192] RAX: ffff8801b6aaa300 RBX: 894cdffffc000000 RCX: ffffffff81ed555d [ 45.404452] RDX: 0000000000000000 RSI: ffffffff81ed5c9e RDI: ffff8801b9a1f338 [ 45.411722] RBP: ffff8801b9a1f4a0 R08: ffff8801b6aaa300 R09: ffffed003b5c5b67 [ 45.418981] R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801d71b2080 [ 45.426238] R13: ffff8801b9a1f338 R14: 1ffff10037343e5b R15: dffffc0000000000 [ 45.433495] FS: 0000000001de9880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 45.441707] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.447571] CR2: 0000000020e2aff8 CR3: 000000000946a000 CR4: 00000000001406f0 [ 45.454825] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.462077] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.469329] Call Trace: [ 45.471931] ? locks_remove_flock+0x236/0x350 [ 45.476430] ? flock_lock_inode+0x11c0/0x11c0 [ 45.480915] ? mark_held_locks+0x130/0x130 [ 45.485144] ? unwind_dump+0x190/0x190 [ 45.489019] ? is_bpf_text_address+0xd3/0x170 [ 45.493510] ? kernel_text_address+0x79/0xf0 [ 45.497905] ? __kernel_text_address+0xd/0x40 [ 45.502489] ? unwind_get_return_address+0x61/0xa0 [ 45.507411] ? __save_stack_trace+0x8d/0xf0 [ 45.511721] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.517269] locks_remove_file+0x148/0x5c0 [ 45.521592] ? fcntl_setlk+0xfc0/0xfc0 [ 45.525465] ? fsnotify_first_mark+0x350/0x350 [ 45.530031] ? __fsnotify_parent+0xcc/0x420 [ 45.534342] ? perf_trace_sched_process_exec+0x860/0x860 [ 45.539777] ? fsnotify+0xf20/0xf20 [ 45.543412] ? __might_sleep+0x95/0x190 [ 45.547373] __fput+0x2f0/0xa70 [ 45.550657] ? get_max_files+0x20/0x20 [ 45.554555] ? trace_hardirqs_on+0xbd/0x310 [ 45.558860] ? kasan_check_read+0x11/0x20 [ 45.562994] ? task_work_run+0x1af/0x2a0 [ 45.567053] ? trace_hardirqs_off_caller+0x300/0x300 [ 45.572145] ____fput+0x15/0x20 [ 45.575426] task_work_run+0x1e8/0x2a0 [ 45.579294] ? task_work_cancel+0x240/0x240 [ 45.583601] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 45.589132] ? switch_task_namespaces+0x9d/0xd0 [ 45.593794] do_exit+0x1ad1/0x26d0 [ 45.597322] ? lock_downgrade+0x900/0x900 [ 45.601457] ? check_preemption_disabled+0x48/0x280 [ 45.606482] ? rcu_read_unlock_special+0x181/0x1c0 [ 45.611404] ? mm_update_next_owner+0x990/0x990 [ 45.616054] ? rcu_softirq_qs+0x20/0x20 [ 45.620008] ? rcu_softirq_qs+0x20/0x20 [ 45.623965] ? unwind_dump+0x190/0x190 [ 45.627839] ? is_bpf_text_address+0xd3/0x170 [ 45.632318] ? kernel_text_address+0x79/0xf0 [ 45.636707] ? __kernel_text_address+0xd/0x40 [ 45.641185] ? unwind_get_return_address+0x61/0xa0 [ 45.646099] ? __save_stack_trace+0x8d/0xf0 [ 45.650409] ? save_stack+0xa9/0xd0 [ 45.654016] ? save_stack+0x43/0xd0 [ 45.657635] ? __kasan_slab_free+0x102/0x150 [ 45.662028] ? kasan_slab_free+0xe/0x10 [ 45.665986] ? kmem_cache_free+0x83/0x290 [ 45.670123] ? locks_free_lock+0x295/0x420 [ 45.674351] ? __x64_sys_flock+0x289/0x350 [ 45.678571] ? do_syscall_64+0x1b9/0x820 [ 45.682616] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.687980] ? trace_hardirqs_off+0xb8/0x310 [ 45.692376] ? kasan_check_read+0x11/0x20 [ 45.696523] ? do_raw_spin_unlock+0xa7/0x330 [ 45.700919] ? trace_hardirqs_off+0xb8/0x310 [ 45.705312] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.710832] ? check_preemption_disabled+0x48/0x280 [ 45.715836] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 45.721358] ? rcu_pm_notify+0xc0/0xc0 [ 45.725229] ? locks_free_lock+0x295/0x420 [ 45.729444] ? locks_free_lock+0x295/0x420 [ 45.733669] ? rcu_read_lock_sched_held+0x14f/0x180 [ 45.738672] ? kmem_cache_free+0x24f/0x290 [ 45.742892] ? locks_free_lock+0x295/0x420 [ 45.747109] ? leases_conflict+0x190/0x190 [ 45.751347] ? locks_mandatory_area+0x6a0/0x6a0 [ 45.756003] ? apparmor_path_rmdir+0x30/0x30 [ 45.760413] do_group_exit+0x177/0x440 [ 45.764291] ? trace_hardirqs_on+0xbd/0x310 [ 45.768596] ? __ia32_sys_exit+0x50/0x50 [ 45.772657] ? trace_hardirqs_off_caller+0x300/0x300 [ 45.777747] __x64_sys_exit_group+0x3e/0x50 [ 45.782054] do_syscall_64+0x1b9/0x820 [ 45.785924] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 45.791288] ? syscall_return_slowpath+0x5e0/0x5e0 [ 45.796214] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.801043] ? trace_hardirqs_on_caller+0x310/0x310 [ 45.806043] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 45.811045] ? prepare_exit_to_usermode+0x291/0x3b0 [ 45.816048] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.820887] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.826057] RIP: 0033:0x43ec48 [ 45.829237] Code: Bad RIP value. [ 45.832581] RSP: 002b:00007ffd3ec7e8c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.840272] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec48 [ 45.847526] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 45.854780] RBP: 00000000004be508 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 45.862034] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 45.869308] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 45.876564] Modules linked in: [ 45.880695] ---[ end trace 05fe557249c24423 ]--- [ 45.885473] RIP: 0010:__x86_indirect_thunk_rbx+0x10/0x20 [ 45.891055] Code: 90 0f ae e8 eb f9 48 89 04 24 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 90 0f ae e8 eb f9 48 89 1c 24 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 e8 07 00 00 00 f3 [ 45.910038] RSP: 0018:ffff8801b9a1f2b0 EFLAGS: 00010293 [ 45.915424] RAX: ffff8801b6aaa300 RBX: 894cdffffc000000 RCX: ffffffff81ed555d [ 45.922725] RDX: 0000000000000000 RSI: ffffffff81ed5c9e RDI: ffff8801b9a1f338 [ 45.929999] RBP: ffff8801b9a1f4a0 R08: ffff8801b6aaa300 R09: ffffed003b5c5b67 [ 45.937305] R10: ffffed003b5c5b67 R11: ffff8801dae2db3b R12: ffff8801d71b2080 [ 45.944618] R13: ffff8801b9a1f338 R14: 1ffff10037343e5b R15: dffffc0000000000 [ 45.951943] FS: 0000000001de9880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 45.960202] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.966070] CR2: 000000000043ec1e CR3: 000000000946a000 CR4: 00000000001406f0 [ 45.973371] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.980675] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.987929] Kernel panic - not syncing: Fatal exception [ 45.994191] Kernel Offset: disabled [ 45.997814] Rebooting in 86400 seconds..