[....] Starting enhanced syslogd: rsyslogd[ 11.113088] audit: type=1400 audit(1514108279.274:5): avc: denied { syslog } for pid=3003 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: [ 16.889837] audit: type=1400 audit(1514108285.051:6): avc: denied { map } for pid=3141 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-7,10.128.15.217' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 23.089493] audit: type=1400 audit(1514108291.251:7): avc: denied { map } for pid=3155 comm="syzkaller090306" path="/root/syzkaller090306262" 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 [ 23.115457] audit: type=1400 audit(1514108291.251:8): avc: denied { map } for pid=3155 comm="syzkaller090306" path="/dev/usbmon0" dev="devtmpfs" ino=8931 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 [ 23.150328] page:00000000df886ebd count:0 mapcount:0 mapping: (null) index:0x0 [ 23.158591] flags: 0x2fffc0000000000() [ 23.162507] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.170389] raw: ffffea000721c360 ffffea000723d060 0000000000000000 0000000000000000 [ 23.178272] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.185371] ------------[ cut here ]------------ [ 23.190090] kernel BUG at ./include/linux/mm.h:844! [ 23.195119] invalid opcode: 0000 [#1] SMP KASAN [ 23.199755] Dumping ftrace buffer: [ 23.203259] (ftrace buffer empty) [ 23.206933] Modules linked in: [ 23.210097] CPU: 1 PID: 3156 Comm: syzkaller090306 Not tainted 4.15.0-rc4+ #236 [ 23.217505] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.226831] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.231807] RSP: 0018:ffff8801c74bf510 EFLAGS: 00010203 [ 23.237133] RAX: 0000000000000000 RBX: 1ffff10038e97ea4 RCX: 0000000000000000 [ 23.244366] RDX: 0000000000000000 RSI: 1ffff10038e97dee RDI: ffffed0038e97e90 [ 23.251599] RBP: ffff8801c74bf5e8 R08: 1ffff10038e97db0 R09: 0000000000000000 [ 23.258832] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038e97ea8 [ 23.266073] R13: dffffc0000000000 R14: ffff8801c74bf840 R15: ffffea000723d180 [ 23.273309] FS: 00007f322ce2d700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 23.281499] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.287346] CR2: 0000000020d66ff5 CR3: 00000001c8cf1005 CR4: 00000000001606e0 [ 23.294584] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.301832] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.309065] Call Trace: [ 23.311626] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.315744] ? finish_fault+0x1b4/0x2a0 [ 23.319685] ? lock_downgrade+0x980/0x980 [ 23.323796] ? do_swap_page+0x2c50/0x2c50 [ 23.327910] __do_fault+0xeb/0x30f [ 23.331418] ? pte_offset_kernel+0xc7/0xc7 [ 23.335630] ? check_noncircular+0x20/0x20 [ 23.339833] ? _raw_spin_unlock+0x22/0x30 [ 23.343948] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.348324] ? __pmd_alloc+0x4e0/0x4e0 [ 23.352180] ? __save_stack_trace+0x7e/0xd0 [ 23.356476] ? find_held_lock+0x35/0x1d0 [ 23.360505] ? handle_mm_fault+0x248/0x8d0 [ 23.364704] ? lock_downgrade+0x980/0x980 [ 23.368826] handle_mm_fault+0x334/0x8d0 [ 23.373980] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.378527] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.384375] ? find_vma+0x30/0x150 [ 23.387890] __get_user_pages+0x50c/0x15f0 [ 23.392097] ? follow_page_mask+0x17f0/0x17f0 [ 23.396561] ? lock_acquire+0x1d5/0x580 [ 23.400673] ? lock_acquire+0x1d5/0x580 [ 23.404612] ? __mm_populate+0x2c7/0x450 [ 23.408641] ? lock_release+0xa40/0xa40 [ 23.412580] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.418431] ? rcu_note_context_switch+0x710/0x710 [ 23.423327] populate_vma_page_range+0x20e/0x2f0 [ 23.428048] ? get_user_pages+0xc0/0xc0 [ 23.431990] ? vmacache_find+0x5f/0x280 [ 23.435931] ? vmacache_update+0xfe/0x130 [ 23.440046] ? find_vma+0x30/0x150 [ 23.443550] __mm_populate+0x23a/0x450 [ 23.447403] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.452298] ? down_read_killable+0x180/0x180 [ 23.456773] ? security_mmap_file+0x143/0x180 [ 23.461236] vm_mmap_pgoff+0x241/0x280 [ 23.465092] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.469901] ? putname+0xee/0x130 [ 23.473325] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.478306] ? kmem_cache_free+0x267/0x2a0 [ 23.482511] SyS_mmap_pgoff+0x462/0x5f0 [ 23.486458] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.491186] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.496169] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.500892] SyS_mmap+0x16/0x20 [ 23.504138] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.508858] RIP: 0033:0x449479 [ 23.512012] RSP: 002b:00007f322ce2ccd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 23.519683] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449479 [ 23.526917] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.534150] RBP: 00000000006dac20 R08: 000000000000000f R09: 0000000000000000 [ 23.541385] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 23.548621] R13: 00007fffce14358f R14: 00007f322ce2d9c0 R15: 0000000000000007 [ 23.555861] 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 [ 23.574926] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c74bf510 [ 23.581469] ---[ end trace 432f597ba7034cb8 ]--- [ 23.586373] Kernel panic - not syncing: Fatal exception [ 23.591751] Dumping ftrace buffer: [ 23.595268] (ftrace buffer empty) [ 23.598956] Kernel Offset: disabled [ 23.602558] Rebooting in 86400 seconds..