[....] Starting enhanced syslogd: rsyslogd[ 11.121883] audit: type=1400 audit(1514145621.890:5): avc: denied { syslog } for pid=2996 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 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 syzkaller login: [ 16.418976] audit: type=1400 audit(1514145627.187:6): avc: denied { map } for pid=3136 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 'ci-upstream-kasan-gce-386-3,10.128.15.226' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 44.063359] audit: type=1400 audit(1514145654.832:7): avc: denied { map } for pid=3154 comm="syzkaller565074" path="/root/syzkaller565074558" 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 [ 44.089337] audit: type=1400 audit(1514145654.832:8): avc: denied { map } for pid=3154 comm="syzkaller565074" path="/dev/usbmon0" dev="devtmpfs" ino=8868 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 [ 44.127181] page:0000000008556506 count:0 mapcount:0 mapping: (null) index:0x0 [ 44.135425] flags: 0x2fffc0000000000() [ 44.139324] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 44.147217] raw: ffffea00072245e0 ffffea00072abe60 0000000000000000 0000000000000000 [ 44.155113] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 44.162237] ------------[ cut here ]------------ [ 44.166965] kernel BUG at ./include/linux/mm.h:844! [ 44.172032] invalid opcode: 0000 [#1] SMP KASAN [ 44.176684] Dumping ftrace buffer: [ 44.180193] (ftrace buffer empty) [ 44.183874] Modules linked in: [ 44.187038] CPU: 0 PID: 3155 Comm: syzkaller565074 Not tainted 4.15.0-rc5+ #147 [ 44.194450] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.203781] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 44.208760] RSP: 0018:ffff8801c8b97388 EFLAGS: 00010203 [ 44.214090] RAX: 0000000000000000 RBX: 1ffff10039172e73 RCX: 0000000000000000 [ 44.221328] RDX: 0000000000000000 RSI: 1ffff10039172dbd RDI: ffffed0039172e60 [ 44.228565] RBP: ffff8801c8b97460 R08: 1ffff10039172d7f R09: 0000000000000000 [ 44.235808] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039172e77 [ 44.243046] R13: dffffc0000000000 R14: ffff8801c8b976b8 R15: ffffea00072892c0 [ 44.250287] FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:00000000f7f9cb40 [ 44.258483] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 44.264332] CR2: 0000000020000000 CR3: 00000001ca2e1002 CR4: 00000000001606f0 [ 44.271575] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.278815] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.286053] Call Trace: [ 44.288611] ? mon_alloc_buff+0x1a0/0x1a0 [ 44.292727] ? finish_fault+0x1b4/0x2a0 [ 44.296669] ? lock_downgrade+0x980/0x980 [ 44.300786] ? do_swap_page+0x2c50/0x2c50 [ 44.304902] __do_fault+0xeb/0x30f [ 44.308413] ? pte_offset_kernel+0xc7/0xc7 [ 44.312617] ? check_noncircular+0x20/0x20 [ 44.316820] ? _raw_spin_unlock+0x22/0x30 [ 44.320952] __handle_mm_fault+0x1d8f/0x3ce0 [ 44.325343] ? __pmd_alloc+0x4e0/0x4e0 [ 44.329198] ? __save_stack_trace+0x7e/0xd0 [ 44.333488] ? find_held_lock+0x35/0x1d0 [ 44.337522] ? handle_mm_fault+0x248/0x8d0 [ 44.341723] ? lock_downgrade+0x980/0x980 [ 44.345847] handle_mm_fault+0x334/0x8d0 [ 44.349875] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 44.354424] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 44.360274] ? find_vma+0x30/0x150 [ 44.363784] __get_user_pages+0x50c/0x15f0 [ 44.367989] ? follow_page_mask+0x17f0/0x17f0 [ 44.372456] ? lock_acquire+0x1d5/0x580 [ 44.376398] ? lock_acquire+0x1d5/0x580 [ 44.380339] ? __mm_populate+0x2c7/0x450 [ 44.384368] ? lock_release+0xa40/0xa40 [ 44.388318] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 44.394170] ? rcu_note_context_switch+0x710/0x710 [ 44.399068] populate_vma_page_range+0x20e/0x2f0 [ 44.403795] ? get_user_pages+0xc0/0xc0 [ 44.407737] ? vmacache_find+0x5f/0x280 [ 44.411678] ? vmacache_update+0xfe/0x130 [ 44.415794] ? find_vma+0x30/0x150 [ 44.419304] __mm_populate+0x23a/0x450 [ 44.423160] ? populate_vma_page_range+0x2f0/0x2f0 [ 44.428057] ? down_read_killable+0x180/0x180 [ 44.432518] ? security_mmap_file+0x143/0x180 [ 44.436983] vm_mmap_pgoff+0x241/0x280 [ 44.440850] ? vma_is_stack_for_current+0xa0/0xa0 [ 44.445659] ? putname+0xee/0x130 [ 44.449091] ? rcu_read_lock_sched_held+0x108/0x120 [ 44.454075] ? kmem_cache_free+0x267/0x2a0 [ 44.458293] SyS_mmap_pgoff+0x462/0x5f0 [ 44.462246] ? find_mergeable_anon_vma+0xd0/0xd0 [ 44.466970] ? do_fast_syscall_32+0x156/0xf9d [ 44.471434] ? find_mergeable_anon_vma+0xd0/0xd0 [ 44.476157] do_fast_syscall_32+0x3ee/0xf9d [ 44.480451] ? do_int80_syscall_32+0x9d0/0x9d0 [ 44.485001] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 44.490510] ? syscall_return_slowpath+0x2ad/0x550 [ 44.495410] ? sysret32_from_system_call+0x5/0x3b [ 44.500223] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.505036] entry_SYSENTER_compat+0x54/0x63 [ 44.509409] RIP: 0023:0xf7fa0c79 [ 44.512739] RSP: 002b:00000000f7f9c11c EFLAGS: 00000296 ORIG_RAX: 00000000000000c0 [ 44.520412] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 44.527649] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000b [ 44.534885] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 44.542120] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 44.549357] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 44.556602] 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 bf a4 fd 48 c7 c6 c0 c0 70 85 4c 89 ff e8 2c a3 cd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 17 bf a4 fd [ 44.575666] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8b97388 [ 44.582203] ---[ end trace ff0b7dcc9f2c61e2 ]--- [ 44.586954] Kernel panic - not syncing: Fatal exception [ 44.592675] Dumping ftrace buffer: [ 44.596183] (ftrace buffer empty) [ 44.599861] Kernel Offset: disabled [ 44.603464] Rebooting in 86400 seconds..