[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 39.640232][ T26] audit: type=1800 audit(1556017202.141:25): pid=7761 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 39.676297][ T26] audit: type=1800 audit(1556017202.141:26): pid=7761 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 39.712728][ T26] audit: type=1800 audit(1556017202.141:27): pid=7761 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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 '10.128.0.166' (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 syzkaller login: [ 48.268336][ T7919] ------------[ cut here ]------------ [ 48.279574][ T7919] memory commitment underflow [ 48.279735][ T7919] WARNING: CPU: 1 PID: 7919 at mm/util.c:657 __vm_enough_memory+0x47b/0x5a0 [ 48.293176][ T7919] Kernel panic - not syncing: panic_on_warn set ... [ 48.299811][ T7919] CPU: 1 PID: 7919 Comm: syz-executor605 Not tainted 5.1.0-rc6 #79 [ 48.307733][ T7919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 executing program [ 48.317807][ T7919] Call Trace: [ 48.321137][ T7919] dump_stack+0x172/0x1f0 [ 48.325507][ T7919] ? __vm_enough_memory+0x3d0/0x5a0 [ 48.330841][ T7919] panic+0x2cb/0x65c [ 48.334772][ T7919] ? __warn_printk+0xf3/0xf3 [ 48.339398][ T7919] ? __vm_enough_memory+0x47b/0x5a0 [ 48.345209][ T7919] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.351486][ T7919] ? __warn.cold+0x5/0x45 [ 48.355848][ T7919] ? __warn+0xe8/0x1d0 [ 48.359950][ T7919] ? __vm_enough_memory+0x47b/0x5a0 [ 48.365195][ T7919] __warn.cold+0x20/0x45 [ 48.369471][ T7919] ? vprintk_emit+0x1ce/0x6d0 [ 48.374175][ T7919] ? __vm_enough_memory+0x47b/0x5a0 [ 48.379422][ T7919] report_bug+0x263/0x2b0 [ 48.383786][ T7919] do_error_trap+0x11b/0x200 [ 48.388417][ T7919] do_invalid_op+0x37/0x50 [ 48.392870][ T7919] ? __vm_enough_memory+0x47b/0x5a0 [ 48.398106][ T7919] invalid_op+0x14/0x20 [ 48.402296][ T7919] RIP: 0010:__vm_enough_memory+0x47b/0x5a0 [ 48.408131][ T7919] Code: e8 aa 79 da ff 0f b6 75 d0 40 84 f6 0f 85 50 fc ff ff e8 58 78 da ff 48 c7 c7 60 7c 72 87 c6 05 2f 73 c4 07 01 e8 03 26 ad ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 14 [ 48.428425][ T7919] RSP: 0018:ffff888088fa7b10 EFLAGS: 00010286 [ 48.434606][ T7919] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 48.443573][ T7919] RDX: 0000000000000000 RSI: ffffffff815afcf6 RDI: ffffed10111f4f54 [ 48.452051][ T7919] RBP: ffff888088fa7b48 R08: ffff88809f842100 R09: ffff88809f8429f0 [ 48.460045][ T7919] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 48.468037][ T7919] R13: ffff88808c6cc900 R14: ffffffff88a2a580 R15: 0000000000000c67 [ 48.476164][ T7919] ? vprintk_func+0x86/0x189 [ 48.482521][ T7919] security_vm_enough_memory_mm+0xa0/0xd0 [ 48.488289][ T7919] copy_process.part.0+0x3411/0x7980 [ 48.495593][ T7919] ? __cleanup_sighand+0x60/0x60 [ 48.500570][ T7919] ? __handle_mm_fault+0x7cd/0x3ec0 [ 48.505817][ T7919] ? __do_page_fault+0x623/0xda0 [ 48.511156][ T7919] ? find_held_lock+0x35/0x130 [ 48.516173][ T7919] _do_fork+0x257/0xfd0 [ 48.520584][ T7919] ? fork_idle+0x1d0/0x1d0 [ 48.525066][ T7919] ? kasan_check_write+0x14/0x20 [ 48.530201][ T7919] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 48.535717][ T7919] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 48.541227][ T7919] ? do_syscall_64+0x26/0x610 [ 48.545946][ T7919] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.552071][ T7919] ? do_syscall_64+0x26/0x610 [ 48.557285][ T7919] __x64_sys_clone+0xbf/0x150 [ 48.562107][ T7919] do_syscall_64+0x103/0x610 [ 48.566756][ T7919] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.572772][ T7919] RIP: 0033:0x43fc4a [ 48.576708][ T7919] 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 [ 48.596857][ T7919] RSP: 002b:00007fff2b379170 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 48.605303][ T7919] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043fc4a [ 48.613816][ T7919] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 48.621819][ T7919] RBP: 00007fff2b379190 R08: 0000000000001eef R09: 0000000001c65880 [ 48.629927][ T7919] R10: 0000000001c65b50 R11: 0000000000000246 R12: 0000000000001eef [ 48.637932][ T7919] R13: 0000000000402090 R14: 0000000000000000 R15: 0000000000000000 [ 48.648121][ T7919] Kernel Offset: disabled [ 48.652603][ T7919] Rebooting in 86400 seconds..