[ 41.755240] audit: type=1800 audit(1556013121.258:30): pid=7583 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 48.150340] kauditd_printk_skb: 4 callbacks suppressed [ 48.150356] audit: type=1400 audit(1556013127.678:35): avc: denied { map } for pid=7758 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.211' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 54.672373] audit: type=1400 audit(1556013134.198:36): avc: denied { map } for pid=7770 comm="syz-executor064" path="/root/syz-executor064776623" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 54.687018] ------------[ cut here ]------------ [ 54.708520] audit: type=1400 audit(1556013134.198:37): avc: denied { map } for pid=7777 comm="syz-executor064" path="/dev/ashmem" dev="devtmpfs" ino=16040 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=chr_file permissive=1 [ 54.708527] memory commitment underflow [ 54.708663] WARNING: CPU: 0 PID: 7777 at mm/util.c:650 __vm_enough_memory+0x47f/0x5a0 [ 54.745492] Kernel panic - not syncing: panic_on_warn set ... [ 54.745492] [ 54.752849] CPU: 0 PID: 7777 Comm: syz-executor064 Not tainted 4.19.36 #4 [ 54.760101] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.769444] Call Trace: [ 54.772030] dump_stack+0x172/0x1f0 [ 54.775774] panic+0x263/0x51d [ 54.778960] ? __warn_printk+0xf3/0xf3 [ 54.782959] ? __vm_enough_memory+0x47f/0x5a0 [ 54.787447] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.792981] ? __warn.cold+0x5/0x54 [ 54.796606] ? __warn+0xe8/0x1d0 [ 54.799964] ? __vm_enough_memory+0x47f/0x5a0 [ 54.804546] __warn.cold+0x20/0x54 [ 54.808082] ? __vm_enough_memory+0x47f/0x5a0 [ 54.812568] report_bug+0x263/0x2b0 [ 54.816360] do_error_trap+0x204/0x360 [ 54.820234] ? math_error+0x340/0x340 [ 54.824109] ? wake_up_klogd+0x99/0xd0 [ 54.828248] ? vprintk_emit+0x1ab/0x690 [ 54.832972] ? error_entry+0x76/0xd0 [ 54.836678] ? trace_hardirqs_off_caller+0x65/0x220 [ 54.841692] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 54.846538] do_invalid_op+0x1b/0x20 [ 54.850243] invalid_op+0x14/0x20 [ 54.853836] RIP: 0010:__vm_enough_memory+0x47f/0x5a0 [ 54.858926] Code: e8 16 97 db ff 0f b6 75 d0 40 84 f6 0f 85 4c fc ff ff e8 c4 95 db ff 48 c7 c7 60 b9 52 87 c6 05 bd 44 a6 07 01 e8 df 71 af ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 0f b6 14 [ 54.878131] RSP: 0018:ffff88808fff7a68 EFLAGS: 00010286 [ 54.883511] RAX: 0000000000000000 RBX: fff8000000000000 RCX: 0000000000000000 [ 54.890786] RDX: 0000000000000000 RSI: ffffffff8155df26 RDI: ffffed1011ffef3f [ 54.898062] RBP: ffff88808fff7aa0 R08: ffff88809833e140 R09: ffffed1015d03ee3 [ 54.905334] R10: ffffed1015d03ee2 R11: ffff8880ae81f717 R12: 0000000000000001 [ 54.912605] R13: ffff88807df54940 R14: ffffffff88821580 R15: 0000000000000c68 [ 54.919904] ? vprintk_func+0x86/0x189 [ 54.923822] ? __vm_enough_memory+0x47f/0x5a0 [ 54.928316] security_vm_enough_memory_mm+0xa0/0xd0 [ 54.933323] __shmem_file_setup.part.0+0x194/0x2b0 [ 54.938246] shmem_file_setup+0x66/0x90 [ 54.942231] ashmem_mmap+0x35f/0x520 [ 54.945954] mmap_region+0xc34/0x1760 [ 54.949750] ? file_map_prot_check+0x1f7/0x390 [ 54.954328] ? __x64_sys_brk+0x6c0/0x6c0 [ 54.958475] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.964002] ? get_unmapped_area+0x295/0x3b0 [ 54.968405] do_mmap+0x8e2/0x1080 [ 54.971858] vm_mmap_pgoff+0x1c5/0x230 [ 54.975737] ? vma_is_stack_for_current+0xd0/0xd0 [ 54.980572] ? iterate_fd+0x360/0x360 [ 54.984373] ksys_mmap_pgoff+0x4aa/0x630 [ 54.988432] ? find_mergeable_anon_vma+0x2e0/0x2e0 [ 54.993351] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.999060] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.003809] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.008558] ? do_syscall_64+0x26/0x610 [ 55.012565] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.017934] __x64_sys_mmap+0xe9/0x1b0 [ 55.021829] do_syscall_64+0x103/0x610 [ 55.025725] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.030907] RIP: 0033:0x441289 [ 55.034087] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 55.052997] RSP: 002b:00007ffcacd057d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 55.060740] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441289 [ 55.068005] RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000000020ffc000 [ 55.075288] RBP: 00000000006cb018 R08: 0000000000000003 R09: 0000000000000000 [ 55.082554] R10: 0080000000000012 R11: 0000000000000246 R12: 0000000000402000 [ 55.089815] R13: 0000000000402090 R14: 0000000000000000 R15: 0000000000000000 [ 55.098570] Kernel Offset: disabled [ 55.102317] Rebooting in 86400 seconds..