[....] Starting enhanced syslogd: rsyslogd[ 13.167534] audit: type=1400 audit(1515878651.334:5): avc: denied { syslog } for pid=3497 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 17.991181] audit: type=1400 audit(1515878656.157:6): avc: denied { map } for pid=3637 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 '10.128.15.226' (ECDSA) to the list of known hosts. executing program executing program executing program [ 31.977370] audit: type=1400 audit(1515878670.144:7): avc: denied { map } for pid=3653 comm="syzkaller442918" path="/root/syzkaller442918479" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program [ 32.003804] audit: type=1400 audit(1515878670.170:8): avc: denied { map } for pid=3653 comm="syzkaller442918" path="/dev/usbmon0" dev="devtmpfs" ino=1092 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usbmon_device_t:s0 tclass=chr_file permissive=1 [ 32.036449] page:ffffea0006f08e80 count:0 mapcount:0 mapping: (null) index:0x0 [ 32.044707] flags: 0x2fffc0000000000() [ 32.048747] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 32.056650] raw: ffffea000751f260 ffffea0006f08ee0 0000000000000000 0000000000000000 [ 32.064525] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 32.071630] ------------[ cut here ]------------ [ 32.076367] kernel BUG at ./include/linux/mm.h:844! [ 32.081394] invalid opcode: 0000 [#1] SMP KASAN [ 32.086044] Dumping ftrace buffer: [ 32.089553] (ftrace buffer empty) [ 32.093237] Modules linked in: [ 32.096408] CPU: 1 PID: 3654 Comm: syzkaller442918 Not tainted 4.15.0-rc7+ #260 [ 32.103820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.113153] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 32.118145] RSP: 0018:ffff8801d9fff510 EFLAGS: 00010203 [ 32.123473] RAX: 0000000000000000 RBX: 1ffff1003b3ffea4 RCX: 0000000000000000 [ 32.130711] RDX: 0000000000000000 RSI: 1ffff1003b3ffdee RDI: ffffed003b3ffe90 [ 32.137951] RBP: ffff8801d9fff5e8 R08: 1ffff1003b3ffdb0 R09: 0000000000000000 [ 32.145204] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003b3ffea8 [ 32.152458] R13: dffffc0000000000 R14: ffff8801d9fff840 R15: ffffea0006f08e80 [ 32.159700] FS: 00007f2cd7754700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 32.167895] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.173845] CR2: 00000000208be000 CR3: 00000001bcf64001 CR4: 00000000001606e0 [ 32.181089] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.188343] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.195583] Call Trace: [ 32.198145] ? mon_alloc_buff+0x1a0/0x1a0 [ 32.202265] ? finish_fault+0x1b4/0x2a0 [ 32.206209] ? lock_downgrade+0x980/0x980 [ 32.210340] ? do_swap_page+0x2c50/0x2c50 [ 32.214476] __do_fault+0xeb/0x30f [ 32.217993] ? pte_offset_kernel+0xc7/0xc7 [ 32.222205] ? check_noncircular+0x20/0x20 [ 32.226408] ? _raw_spin_unlock+0x22/0x30 [ 32.230535] __handle_mm_fault+0x1d8f/0x3ce0 [ 32.234915] ? __pmd_alloc+0x4e0/0x4e0 [ 32.238772] ? __save_stack_trace+0x7e/0xd0 [ 32.243065] ? find_held_lock+0x35/0x1d0 [ 32.247097] ? handle_mm_fault+0x248/0x8d0 [ 32.251314] ? lock_downgrade+0x980/0x980 [ 32.255444] handle_mm_fault+0x334/0x8d0 [ 32.259475] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 32.264023] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 32.269871] ? find_vma+0x30/0x150 [ 32.273381] __get_user_pages+0x50c/0x15f0 [ 32.277588] ? follow_page_mask+0x17f0/0x17f0 [ 32.282053] ? lock_acquire+0x1d5/0x580 [ 32.285992] ? lock_acquire+0x1d5/0x580 [ 32.289933] ? __mm_populate+0x2c7/0x450 [ 32.293965] ? lock_release+0xa40/0xa40 [ 32.297913] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 32.303770] ? rcu_note_context_switch+0x710/0x710 [ 32.308671] populate_vma_page_range+0x20e/0x2f0 [ 32.313394] ? get_user_pages+0xc0/0xc0 [ 32.317334] ? vmacache_find+0x5f/0x280 [ 32.321275] ? vmacache_update+0xfe/0x130 [ 32.325398] ? find_vma+0x30/0x150 [ 32.328904] __mm_populate+0x23a/0x450 [ 32.332762] ? populate_vma_page_range+0x2f0/0x2f0 [ 32.337666] ? down_read_killable+0x180/0x180 [ 32.342128] ? security_mmap_file+0x143/0x180 [ 32.346597] vm_mmap_pgoff+0x241/0x280 [ 32.350468] ? vma_is_stack_for_current+0xa0/0xa0 [ 32.355464] ? putname+0xee/0x130 [ 32.358886] ? rcu_read_lock_sched_held+0x108/0x120 [ 32.363871] ? kmem_cache_free+0x267/0x2a0 [ 32.368079] SyS_mmap_pgoff+0x462/0x5f0 [ 32.372037] ? find_mergeable_anon_vma+0xd0/0xd0 [ 32.376759] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 32.381742] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 32.386467] SyS_mmap+0x16/0x20 [ 32.389724] entry_SYSCALL_64_fastpath+0x23/0x9a [ 32.394457] RIP: 0033:0x449279 [ 32.397615] RSP: 002b:00007f2cd7753d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 32.405289] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449279 [ 32.412543] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 32.419797] RBP: 0000000000000000 R08: 0000000000000008 R09: 0000000000000000 [ 32.427035] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 32.434286] R13: 6273752f7665642f R14: 00007f2cd77549c0 R15: 0000000000000007 [ 32.441545] Code: 00 44 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 41 bc 02 00 00 00 eb bb e8 1b 2c 92 fd 48 c7 c6 00 00 13 86 4c 89 ff e8 6c 2b bb fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 f7 2b 92 fd [ 32.460625] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801d9fff510 [ 32.467177] ---[ end trace 0a15022458cfcd78 ]--- [ 32.472078] Kernel panic - not syncing: Fatal exception [ 32.477833] Dumping ftrace buffer: [ 32.481346] (ftrace buffer empty) [ 32.485071] Kernel Offset: disabled [ 32.488679] Rebooting in 86400 seconds..