[ 43.196845] audit: type=1800 audit(1549080548.170:29): pid=7825 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 43.217759] audit: type=1800 audit(1549080548.180:30): pid=7825 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=2457 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 Warning: Permanently added '10.128.0.138' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 52.766281] kauditd_printk_skb: 5 callbacks suppressed [ 52.766295] audit: type=1400 audit(1549080557.740:36): avc: denied { map } for pid=8010 comm="syz-executor737" path="/root/syz-executor737078335" 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 [ 52.777771] ------------[ cut here ]------------ [ 52.808673] audit: type=1400 audit(1549080557.750:37): avc: denied { map } for pid=8018 comm="syz-executor737" path="/dev/ashmem" dev="devtmpfs" ino=17285 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=chr_file permissive=1 [ 52.809230] memory commitment underflow [ 52.809354] WARNING: CPU: 0 PID: 8019 at mm/util.c:643 __vm_enough_memory+0x47b/0x5a0 [ 52.845541] Kernel panic - not syncing: panic_on_warn set ... [ 52.851408] CPU: 0 PID: 8019 Comm: syz-executor737 Not tainted 5.0.0-rc4+ #56 [ 52.858675] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.868007] Call Trace: [ 52.870572] dump_stack+0x172/0x1f0 [ 52.874178] ? __vm_enough_memory+0x3d0/0x5a0 [ 52.878652] panic+0x2cb/0x65c [ 52.881874] ? __warn_printk+0xf3/0xf3 [ 52.885801] ? __vm_enough_memory+0x47b/0x5a0 [ 52.890284] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.895898] ? __warn.cold+0x5/0x45 [ 52.899517] ? __warn+0xe8/0x1d0 [ 52.902885] ? __vm_enough_memory+0x47b/0x5a0 [ 52.907385] __warn.cold+0x20/0x45 [ 52.910953] ? __vm_enough_memory+0x47b/0x5a0 [ 52.915603] report_bug+0x263/0x2b0 [ 52.919219] do_error_trap+0x11b/0x200 [ 52.923101] do_invalid_op+0x37/0x50 [ 52.926803] ? __vm_enough_memory+0x47b/0x5a0 [ 52.931304] invalid_op+0x14/0x20 [ 52.934777] RIP: 0010:__vm_enough_memory+0x47b/0x5a0 [ 52.939900] 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 [ 52.958801] RSP: 0018:ffff88809612fa68 EFLAGS: 00010286 [ 52.964139] RAX: 0000000000000000 RBX: fff8000000000000 RCX: 0000000000000000 [ 52.971391] RDX: 0000000000000000 RSI: ffffffff815a8a06 RDI: ffffed1012c25f3f [ 52.978648] RBP: ffff88809612faa0 R08: ffff888098d201c0 R09: ffff888098d20a88 [ 52.985904] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 52.993175] R13: ffff888084df4ac0 R14: ffffffff88a276c0 R15: 0000000000000c67 [ 53.000441] ? vprintk_func+0x86/0x189 [ 53.004353] ? __vm_enough_memory+0x47b/0x5a0 [ 53.008828] security_vm_enough_memory_mm+0xa0/0xd0 [ 53.013838] __shmem_file_setup.part.0+0x194/0x2b0 [ 53.018764] shmem_file_setup+0x66/0x90 [ 53.022746] ashmem_mmap+0x35f/0x520 [ 53.026456] mmap_region+0xc37/0x1760 [ 53.030240] ? file_map_prot_check+0x1f7/0x390 [ 53.034817] ? __x64_sys_brk+0x760/0x760 [ 53.038887] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 53.044427] ? get_unmapped_area+0x295/0x3b0 [ 53.048819] do_mmap+0x8e2/0x1080 [ 53.052272] vm_mmap_pgoff+0x1c5/0x230 [ 53.056153] ? vma_is_stack_for_current+0xd0/0xd0 [ 53.060974] ? iterate_fd+0x360/0x360 [ 53.064761] ksys_mmap_pgoff+0x4aa/0x630 [ 53.068804] ? find_mergeable_anon_vma+0x2e0/0x2e0 [ 53.073710] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.079240] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 53.083993] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 53.088731] ? do_syscall_64+0x26/0x610 [ 53.092688] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.098060] __x64_sys_mmap+0xe9/0x1b0 [ 53.101953] do_syscall_64+0x103/0x610 [ 53.105826] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.111014] RIP: 0033:0x440e79 [ 53.114187] 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 0b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 53.133258] RSP: 002b:00007ffe8063ac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 [ 53.140965] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000440e79 [ 53.148225] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 00000000206ff000 [ 53.155490] RBP: 00000000006cb018 R08: 0000000000000003 R09: 0000000000000000 [ 53.162754] R10: 0000002000000012 R11: 0000000000000246 R12: 0000000000401d10 [ 53.170016] R13: 0000000000401da0 R14: 0000000000000000 R15: 0000000000000000 [ 53.178374] Kernel Offset: disabled [ 53.182055] Rebooting in 86400 seconds..