[....] Starting enhanced syslogd: rsyslogd[ 11.354299] audit: type=1400 audit(1515463702.186:5): avc: denied { syslog } for pid=3320 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: [ 16.626815] audit: type=1400 audit(1515463707.459:6): avc: denied { map } for pid=3459 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 '10.128.15.234' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 22.799691] audit: type=1400 audit(1515463713.632:7): avc: denied { map } for pid=3473 comm="syzkaller060792" path="/root/syzkaller060792216" 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 [ 22.828122] audit: type=1400 audit(1515463713.660:8): avc: denied { map } for pid=3473 comm="syzkaller060792" path="/dev/usbmon0" dev="devtmpfs" ino=8995 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 [ 22.855621] page:ffffea00070e5a80 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.863823] flags: 0x2fffc0000000000() [ 22.867867] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.875756] raw: ffffea000701b5a0 ffffea0007000ba0 0000000000000000 0000000000000000 [ 22.883639] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.890736] ------------[ cut here ]------------ [ 22.895460] kernel BUG at ./include/linux/mm.h:844! [ 22.900483] invalid opcode: 0000 [#1] SMP KASAN [ 22.905127] Dumping ftrace buffer: [ 22.908630] (ftrace buffer empty) [ 22.912306] Modules linked in: [ 22.915466] CPU: 0 PID: 3474 Comm: syzkaller060792 Not tainted 4.15.0-rc6-mm1+ #52 [ 22.923142] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.932469] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.937447] RSP: 0018:ffff8801c020f510 EFLAGS: 00010203 [ 22.942774] RAX: 0000000000000000 RBX: 1ffff10038041ea4 RCX: 0000000000000000 [ 22.950014] RDX: 0000000000000000 RSI: 1ffff10038041db8 RDI: ffffed0038041e90 [ 22.957254] RBP: ffff8801c020f5e8 R08: 1ffff10038041db0 R09: 0000000000000000 [ 22.964488] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038041ea8 [ 22.971725] R13: dffffc0000000000 R14: ffff8801c020f840 R15: ffffea00070e5a80 [ 22.978960] FS: 00007fb7b0c79700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.987152] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.992998] CR2: 000055b3366db480 CR3: 00000001d52ce006 CR4: 00000000001606f0 [ 23.000237] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.007472] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.014705] Call Trace: [ 23.017261] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.021374] ? find_held_lock+0x35/0x1d0 [ 23.025410] __do_fault+0xeb/0x30f [ 23.028915] ? vma_gap_callbacks_rotate+0x62/0x80 [ 23.033722] ? pte_offset_kernel+0xc7/0xc7 [ 23.037920] ? print_irqtrace_events+0x270/0x270 [ 23.042641] ? rb_insert_color_cached+0x1660/0x1660 [ 23.047625] ? vma_compute_subtree_gap+0x200/0x200 [ 23.052518] ? rb_insert_color_cached+0x1660/0x1660 [ 23.057499] ? check_noncircular+0x20/0x20 [ 23.061700] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.066077] ? __pmd_alloc+0x4e0/0x4e0 [ 23.069934] ? find_held_lock+0x35/0x1d0 [ 23.073966] ? handle_mm_fault+0x2a0/0x930 [ 23.078166] ? lock_downgrade+0x980/0x980 [ 23.082296] handle_mm_fault+0x38f/0x930 [ 23.086324] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.090870] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.096716] ? find_vma+0x30/0x150 [ 23.100222] __get_user_pages+0x50c/0x15f0 [ 23.104427] ? follow_page_mask+0x17f0/0x17f0 [ 23.108885] ? vma_link+0xe9/0x170 [ 23.112390] ? lock_acquire+0x1d5/0x580 [ 23.116329] ? lock_acquire+0x1d5/0x580 [ 23.120269] ? __mm_populate+0x2c7/0x450 [ 23.124297] ? lock_release+0xa40/0xa40 [ 23.128236] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.134088] ? rcu_note_context_switch+0x710/0x710 [ 23.138985] populate_vma_page_range+0x20e/0x2f0 [ 23.143709] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 23.148600] ? vmacache_find+0x5f/0x280 [ 23.152537] ? vmacache_update+0xfe/0x130 [ 23.156651] ? find_vma+0x30/0x150 [ 23.160158] __mm_populate+0x23a/0x450 [ 23.164020] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.168916] ? down_read_killable+0x180/0x180 [ 23.173377] ? security_mmap_file+0x143/0x180 [ 23.177845] vm_mmap_pgoff+0x241/0x280 [ 23.181706] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.186512] ? putname+0xee/0x130 [ 23.189932] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.194913] ? kmem_cache_free+0x273/0x2b0 [ 23.199118] SyS_mmap_pgoff+0x462/0x5f0 [ 23.203060] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.207783] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.212766] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.217491] SyS_mmap+0x16/0x20 [ 23.220736] entry_SYSCALL_64_fastpath+0x23/0x9a [ 23.225456] RIP: 0033:0x449b99 [ 23.228611] RSP: 002b:00007fb7b0c78d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 23.236281] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 0000000000449b99 [ 23.243518] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.250752] RBP: 00000000006dbc20 R08: 0000000000000018 R09: 0000000000000000 [ 23.257989] R10: 0000000000008011 R11: 0000000000000212 R12: 78756e696c65732f [ 23.265224] R13: 7361682f6376612f R14: 6273752f7665642f R15: 000000000000000b [ 23.272467] 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 3b 8b 90 fd 48 c7 c6 a0 0e 13 86 4c 89 ff e8 0c 74 ba fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 17 8b 90 fd [ 23.291532] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c020f510 [ 23.298064] ---[ end trace efc7c6b8ac0532c1 ]--- [ 23.302977] Kernel panic - not syncing: Fatal exception [ 23.309159] Dumping ftrace buffer: [ 23.312670] (ftrace buffer empty) [ 23.316347] Kernel Offset: disabled [ 23.319940] Rebooting in 86400 seconds..