[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 28.505073] sshd (5939) used greatest stack depth: 15720 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 28.789926] kauditd_printk_skb: 7 callbacks suppressed [ 28.789938] audit: type=1800 audit(1544115026.853:29): pid=5872 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 [ 28.818973] audit: type=1800 audit(1544115026.853:30): pid=5872 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 '10.128.0.112' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 40.971307] ------------[ cut here ]------------ [ 40.976358] memory commitment underflow [ 40.976462] WARNING: CPU: 0 PID: 3810 at mm/util.c:645 __vm_enough_memory+0x734/0x960 [ 40.988511] Kernel panic - not syncing: panic_on_warn set ... [ 40.994489] CPU: 0 PID: 3810 Comm: udevd Not tainted 4.20.0-rc5+ #364 [ 41.001091] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.010452] Call Trace: [ 41.013058] dump_stack+0x244/0x39d [ 41.016718] ? dump_stack_print_info.cold.1+0x20/0x20 [ 41.021933] panic+0x2ad/0x55c [ 41.025130] ? add_taint.cold.5+0x16/0x16 [ 41.029280] ? __warn.cold.8+0x5/0x45 [ 41.033079] ? __warn+0xe8/0x1d0 [ 41.036451] ? __vm_enough_memory+0x734/0x960 [ 41.040957] __warn.cold.8+0x20/0x45 [ 41.044717] ? rcu_softirq_qs+0x20/0x20 [ 41.048716] ? __vm_enough_memory+0x734/0x960 [ 41.053258] report_bug+0x254/0x2d0 [ 41.056951] do_error_trap+0x11b/0x200 [ 41.060882] do_invalid_op+0x36/0x40 [ 41.064611] ? __vm_enough_memory+0x734/0x960 [ 41.069130] invalid_op+0x14/0x20 [ 41.072598] RIP: 0010:__vm_enough_memory+0x734/0x960 [ 41.077731] Code: 60 d3 ff 0f b6 85 28 fe ff ff 84 c0 0f 85 4e fa ff ff e8 ff 5f d3 ff 48 c7 c7 60 99 32 88 c6 05 0c 8a 66 08 01 e8 fc bf 9c ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 14 [ 41.096640] RSP: 0018:ffff8881bd3d6ca0 EFLAGS: 00010282 [ 41.102008] RAX: 0000000000000000 RBX: 1ffff11037a7ad98 RCX: 0000000000000000 [ 41.109283] RDX: 0000000000000000 RSI: ffffffff8165fbe5 RDI: 0000000000000006 [ 41.116564] RBP: ffff8881bd3d6e88 R08: ffff8881bd3ce300 R09: 0000000000000006 [ 41.123854] R10: 0000000000000000 R11: ffff8881bd3ce300 R12: ffff8881bd3d6e60 [ 41.131136] R13: 0000000000000c60 R14: ffffffff8961c660 R15: 0000000000000001 [ 41.138424] ? vprintk_func+0x85/0x181 [ 41.142333] ? vm_commit_limit+0xd0/0xd0 [ 41.146430] ? copy_process+0x4413/0x87a0 [ 41.150595] ? lock_downgrade+0x900/0x900 [ 41.154766] ? lock_release+0xa00/0xa00 [ 41.158753] ? perf_trace_sched_process_exec+0x860/0x860 [ 41.164215] ? dup_userfaultfd+0x6d8/0x890 [ 41.168578] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 41.174138] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.179691] ? cap_capable+0x1f9/0x260 [ 41.183624] security_vm_enough_memory_mm+0x9d/0xc0 [ 41.188646] copy_process+0x4146/0x87a0 [ 41.192733] ? __cleanup_sighand+0x70/0x70 [ 41.196978] ? trace_hardirqs_on+0xbd/0x310 [ 41.201340] ? __lock_acquire+0x62f/0x4c20 [ 41.205604] ? print_usage_bug+0xc0/0xc0 [ 41.209709] ? mark_held_locks+0x130/0x130 [ 41.213988] ? mark_held_locks+0x130/0x130 [ 41.218246] ? lock_unpin_lock+0x4a0/0x4a0 [ 41.222494] ? print_usage_bug+0xc0/0xc0 [ 41.226572] ? __lock_acquire+0x62f/0x4c20 [ 41.230829] ? zap_class+0x640/0x640 [ 41.234574] ? print_usage_bug+0xc0/0xc0 [ 41.238666] ? __lock_acquire+0x62f/0x4c20 [ 41.242925] ? zap_class+0x640/0x640 [ 41.246653] ? print_usage_bug+0xc0/0xc0 [ 41.250768] ? mark_held_locks+0x130/0x130 [ 41.255012] ? zap_class+0x640/0x640 [ 41.258736] ? trace_hardirqs_on+0xbd/0x310 [ 41.263062] ? print_usage_bug+0xc0/0xc0 [ 41.267232] ? trace_hardirqs_off_caller+0x310/0x310 [ 41.272328] ? do_raw_spin_trylock+0x270/0x270 [ 41.276896] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 41.281825] ? kasan_check_read+0x11/0x20 [ 41.285989] ? print_usage_bug+0xc0/0xc0 [ 41.290064] ? find_held_lock+0x36/0x1c0 [ 41.294140] ? zap_class+0x640/0x640 [ 41.297848] ? print_usage_bug+0xc0/0xc0 [ 41.301896] ? mark_held_locks+0xc7/0x130 [ 41.306099] ? print_usage_bug+0xc0/0xc0 [ 41.310186] ? __lock_acquire+0x62f/0x4c20 [ 41.314434] ? zap_class+0x640/0x640 [ 41.318160] ? __lock_acquire+0x62f/0x4c20 [ 41.322422] ? find_held_lock+0x36/0x1c0 [ 41.326492] ? is_bpf_text_address+0xac/0x170 [ 41.331200] ? check_preemption_disabled+0x48/0x280 [ 41.336240] ? kasan_check_read+0x11/0x20 [ 41.340402] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 41.345691] ? rcu_softirq_qs+0x20/0x20 [ 41.349676] ? rcu_softirq_qs+0x20/0x20 [ 41.353656] ? unwind_dump+0x190/0x190 [ 41.357593] ? kernel_text_address+0x79/0xf0 [ 41.362002] ? __kernel_text_address+0xd/0x40 [ 41.366510] ? unwind_get_return_address+0x61/0xa0 [ 41.371457] ? __save_stack_trace+0x8d/0xf0 [ 41.375811] ? save_stack+0xa9/0xd0 [ 41.379492] ? save_stack+0x43/0xd0 [ 41.383138] ? __kasan_slab_free+0x102/0x150 [ 41.387585] ? kasan_slab_free+0xe/0x10 [ 41.391572] ? kmem_cache_free+0x83/0x290 [ 41.395731] ? putname+0xf2/0x130 [ 41.399196] ? do_unlinkat+0x236/0xa30 [ 41.403132] ? __x64_sys_unlink+0x42/0x50 [ 41.407300] ? do_syscall_64+0x1b9/0x820 [ 41.411375] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.416849] ? trace_hardirqs_off+0xb8/0x310 [ 41.421263] ? kasan_check_read+0x11/0x20 [ 41.425404] ? do_raw_spin_unlock+0xa7/0x330 [ 41.429814] ? trace_hardirqs_on+0x310/0x310 [ 41.434234] ? rcu_softirq_qs+0x20/0x20 [ 41.438223] ? dput.part.25+0x241/0x860 [ 41.442219] ? trace_hardirqs_off+0xb8/0x310 [ 41.446645] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.452208] ? check_preemption_disabled+0x48/0x280 [ 41.457273] ? rcu_pm_notify+0xc0/0xc0 [ 41.461186] _do_fork+0x1cb/0x11d0 [ 41.464734] ? fork_idle+0x1d0/0x1d0 [ 41.468439] ? putname+0xf7/0x130 [ 41.471904] ? do_unlinkat+0x23b/0xa30 [ 41.475825] ? __ia32_sys_rmdir+0x40/0x40 [ 41.480010] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 41.485562] ? strncpy_from_user+0x411/0x5a0 [ 41.489989] ? do_syscall_64+0x9a/0x820 [ 41.493977] ? do_syscall_64+0x9a/0x820 [ 41.497969] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 41.502569] ? trace_hardirqs_on+0xbd/0x310 [ 41.506901] ? exit_to_usermode_loop+0x1f4/0x380 [ 41.511670] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.517102] ? trace_hardirqs_off_caller+0x310/0x310 [ 41.522230] __x64_sys_clone+0xbf/0x150 [ 41.526229] do_syscall_64+0x1b9/0x820 [ 41.530129] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 41.535493] ? syscall_return_slowpath+0x5e0/0x5e0 [ 41.540419] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.545278] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.550311] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 41.555341] ? prepare_exit_to_usermode+0x291/0x3b0 [ 41.560378] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.565241] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.570452] RIP: 0033:0x7fef40500f46 [ 41.574179] Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 14 25 10 00 00 00 31 d2 49 81 c2 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 31 01 00 00 85 c0 41 89 c4 0f 85 3b 01 00 [ 41.593093] RSP: 002b:00007fffc8fc4870 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 41.600837] RAX: ffffffffffffffda RBX: 00007fffc8fc4870 RCX: 00007fef40500f46 [ 41.608117] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 41.615422] RBP: 00007fffc8fc48d0 R08: 0000000000000ee2 R09: 0000000000000ee2 [ 41.622715] R10: 00007fef40e1da70 R11: 0000000000000246 R12: 0000000000000000 [ 41.629986] R13: 00007fffc8fc4890 R14: 0000000000000003 R15: 0000000000000003 [ 41.638457] Kernel Offset: disabled [ 41.642139] Rebooting in 86400 seconds..