[ 39.910829] audit: type=1800 audit(1549080548.912:25): pid=7713 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 39.943549] audit: type=1800 audit(1549080548.922:26): pid=7713 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 39.981544] audit: type=1800 audit(1549080548.922:27): pid=7713 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 40.001459] audit: type=1800 audit(1549080548.922:28): pid=7713 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.164' (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 syzkaller login: [ 50.359523] ------------[ cut here ]------------ [ 50.372193] memory commitment underflow [ 50.372340] WARNING: CPU: 0 PID: 7865 at mm/util.c:643 __vm_enough_memory+0x47b/0x5a0 [ 50.384282] Kernel panic - not syncing: panic_on_warn set ... [ 50.390170] CPU: 0 PID: 7865 Comm: syz-executor155 Not tainted 5.0.0-rc4+ #56 [ 50.397464] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.406818] Call Trace: executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.409413] dump_stack+0x172/0x1f0 [ 50.413069] ? __vm_enough_memory+0x3d0/0x5a0 [ 50.417573] panic+0x2cb/0x65c [ 50.420775] ? __warn_printk+0xf3/0xf3 [ 50.424676] ? __vm_enough_memory+0x47b/0x5a0 [ 50.429174] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.434724] ? __warn.cold+0x5/0x45 [ 50.438359] ? __warn+0xe8/0x1d0 [ 50.441736] ? __vm_enough_memory+0x47b/0x5a0 [ 50.446240] __warn.cold+0x20/0x45 [ 50.449789] ? vprintk_emit+0x1ce/0x6d0 [ 50.453771] ? __vm_enough_memory+0x47b/0x5a0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.458281] report_bug+0x263/0x2b0 [ 50.461922] do_error_trap+0x11b/0x200 [ 50.465821] do_invalid_op+0x37/0x50 [ 50.469561] ? __vm_enough_memory+0x47b/0x5a0 [ 50.474078] invalid_op+0x14/0x20 [ 50.477542] RIP: 0010:__vm_enough_memory+0x47b/0x5a0 [ 50.482647] Code: e8 7a 42 db ff 0f b6 75 d0 40 84 f6 0f 85 50 fc ff ff e8 28 41 db ff 48 c7 c7 a0 f9 72 87 c6 05 0f 3d c4 07 01 e8 c3 94 ae ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 14 [ 50.501551] RSP: 0018:ffff88808c647b10 EFLAGS: 00010286 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.506920] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 50.514195] RDX: 0000000000000000 RSI: ffffffff815a8a06 RDI: ffffed10118c8f54 [ 50.521487] RBP: ffff88808c647b48 R08: ffff88808f81e3c0 R09: ffff88808f81ecb0 [ 50.528762] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 50.536035] R13: ffff88808f186000 R14: ffffffff88a276c0 R15: 0000000000000c67 [ 50.543322] ? vprintk_func+0x86/0x189 [ 50.547232] security_vm_enough_memory_mm+0xa0/0xd0 [ 50.552261] copy_process.part.0+0x3411/0x79a0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.556876] ? __cleanup_sighand+0x70/0x70 [ 50.561125] ? __handle_mm_fault+0x7cd/0x3f20 [ 50.565640] ? __do_page_fault+0x610/0xd60 [ 50.569888] ? find_held_lock+0x35/0x130 [ 50.574462] _do_fork+0x257/0xfe0 [ 50.577931] ? fork_idle+0x1d0/0x1d0 [ 50.581663] ? kasan_check_write+0x14/0x20 [ 50.585909] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.590680] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.595457] ? do_syscall_64+0x26/0x610 [ 50.599479] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.604854] ? do_syscall_64+0x26/0x610 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.608855] __x64_sys_clone+0xbf/0x150 [ 50.612859] do_syscall_64+0x103/0x610 [ 50.616773] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.621963] RIP: 0033:0x43f83a [ 50.625175] Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 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 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 [ 50.644074] RSP: 002b:00007fff25b19690 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 50.651803] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043f83a executing program executing program executing program executing program executing program executing program executing program executing program [ 50.660025] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 50.667299] RBP: 00007fff25b196b0 R08: 0000000000001eb9 R09: 00000000020c1880 [ 50.674589] R10: 00000000020c1b50 R11: 0000000000000246 R12: 0000000000001eb9 [ 50.681864] R13: 0000000000401da0 R14: 0000000000000000 R15: 0000000000000000 [ 50.690220] Kernel Offset: disabled [ 50.693896] Rebooting in 86400 seconds..