[....] Starting enhanced syslogd: rsyslogd[ 11.037681] audit: type=1400 audit(1514276555.742:5): avc: denied { syslog } for pid=2998 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: [ 16.865631] audit: type=1400 audit(1514276561.570:6): avc: denied { map } for pid=3138 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-mmots-kasan-gce-8,10.128.15.213' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program [ 23.074299] audit: type=1400 audit(1514276567.778:7): avc: denied { map } for pid=3152 comm="syzkaller507678" path="/root/syzkaller507678106" 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 [ 23.100260] audit: type=1400 audit(1514276567.788:8): avc: denied { map } for pid=3152 comm="syzkaller507678" path="/dev/usbmon0" dev="devtmpfs" ino=8848 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 [ 23.127791] page:ffffea000722d440 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.136000] flags: 0x2fffc0000000000() [ 23.139925] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.147815] raw: ffffea0007268da0 ffffea000722d420 0000000000000000 0000000000000000 [ 23.155702] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.162851] ------------[ cut here ]------------ [ 23.167590] kernel BUG at ./include/linux/mm.h:844! [ 23.172614] invalid opcode: 0000 [#1] SMP KASAN [ 23.177260] Dumping ftrace buffer: [ 23.180765] (ftrace buffer empty) [ 23.184444] Modules linked in: [ 23.187607] CPU: 0 PID: 3153 Comm: syzkaller507678 Not tainted 4.15.0-rc4-mm1+ #49 [ 23.195276] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.204630] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.209612] RSP: 0018:ffff8801c840f510 EFLAGS: 00010203 [ 23.214943] RAX: 0000000000000000 RBX: 1ffff10039081ea4 RCX: 0000000000000000 [ 23.222179] RDX: 0000000000000000 RSI: 1ffff10039081dee RDI: ffffed0039081e90 [ 23.229416] RBP: ffff8801c840f5e8 R08: 1ffff10039081db0 R09: 0000000000000000 [ 23.236655] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039081ea8 [ 23.243893] R13: dffffc0000000000 R14: ffff8801c840f840 R15: ffffea000722d440 [ 23.251132] FS: 00007f0af7033700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.259324] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.265173] CR2: 000055a92d8ec0b8 CR3: 00000001ca375002 CR4: 00000000001606f0 [ 23.272413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.279649] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.286887] Call Trace: [ 23.289446] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.293561] ? find_held_lock+0x35/0x1d0 [ 23.297599] __do_fault+0xeb/0x30f [ 23.301106] ? vma_gap_callbacks_rotate+0x62/0x80 [ 23.305916] ? pte_offset_kernel+0xc7/0xc7 [ 23.310127] ? print_irqtrace_events+0x270/0x270 [ 23.314852] ? rb_insert_color_cached+0x1660/0x1660 [ 23.319837] ? vma_compute_subtree_gap+0x200/0x200 [ 23.324735] ? rb_insert_color_cached+0x1660/0x1660 [ 23.329718] ? check_noncircular+0x20/0x20 [ 23.333932] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.338312] ? __pmd_alloc+0x4e0/0x4e0 [ 23.342170] ? find_held_lock+0x35/0x1d0 [ 23.346202] ? handle_mm_fault+0x2a0/0x930 [ 23.350406] ? lock_downgrade+0x980/0x980 [ 23.354532] handle_mm_fault+0x38f/0x930 [ 23.358562] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.363112] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.368964] ? find_vma+0x30/0x150 [ 23.372475] __get_user_pages+0x50c/0x15f0 [ 23.376685] ? follow_page_mask+0x17f0/0x17f0 [ 23.381158] ? vma_link+0xe9/0x170 [ 23.384681] ? lock_acquire+0x1d5/0x580 [ 23.388627] ? lock_acquire+0x1d5/0x580 [ 23.392567] ? __mm_populate+0x2c7/0x450 [ 23.396600] ? lock_release+0xa40/0xa40 [ 23.400546] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.406408] ? rcu_note_context_switch+0x710/0x710 [ 23.411312] populate_vma_page_range+0x20e/0x2f0 [ 23.416040] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 23.421030] ? vmacache_find+0x5f/0x280 [ 23.424975] ? vmacache_update+0xfe/0x130 [ 23.429093] ? find_vma+0x30/0x150 [ 23.432602] __mm_populate+0x23a/0x450 [ 23.436461] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.441358] ? down_read_killable+0x180/0x180 [ 23.445823] ? security_mmap_file+0x143/0x180 [ 23.450292] vm_mmap_pgoff+0x241/0x280 [ 23.454155] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.458969] ? putname+0xee/0x130 [ 23.462405] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.467390] ? kmem_cache_free+0x267/0x2a0 [ 23.471599] SyS_mmap_pgoff+0x462/0x5f0 [ 23.475544] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.480267] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.485259] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.489985] SyS_mmap+0x16/0x20 [ 23.493234] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.497958] RIP: 0033:0x449339 [ 23.501118] RSP: 002b:00007f0af7032d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 23.508807] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449339 [ 23.516044] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.523281] RBP: 00000000006dac20 R08: 000000000000001e R09: 0000000000000000 [ 23.530518] R10: 0000000000008011 R11: 0000000000000212 R12: 747865746e6f632f [ 23.537756] R13: 78756e696c65732f R14: 6273752f7665642f R15: 0000000000000009 [ 23.545001] 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 db e1 96 fd 48 c7 c6 80 1f d1 85 4c 89 ff e8 6c a3 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 b7 e1 96 fd [ 23.564083] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c840f510 [ 23.570588] ---[ end trace 15059b0fe91b04a2 ]--- [ 23.575338] Kernel panic - not syncing: Fatal exception [ 23.581113] Dumping ftrace buffer: [ 23.584622] (ftrace buffer empty) [ 23.588299] Kernel Offset: disabled [ 23.591895] Rebooting in 86400 seconds..