[....] Starting enhanced syslogd: rsyslogd[ 12.277494] audit: type=1400 audit(1515562521.544:5): avc: denied { syslog } for pid=3341 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 17.324049] audit: type=1400 audit(1515562526.590:6): avc: denied { map } for pid=3479 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 '10.128.0.39' (ECDSA) to the list of known hosts. executing program executing program [ 23.574950] audit: type=1400 audit(1515562532.841:7): avc: denied { map } for pid=3493 comm="syzkaller441133" path="/root/syzkaller441133263" 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 executing program executing program executing program [ 23.615559] audit: type=1400 audit(1515562532.882:8): avc: denied { map } for pid=3493 comm="syzkaller441133" path="/dev/usbmon0" dev="devtmpfs" ino=8922 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 [ 23.670263] page:ffffea0007011a00 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.678557] flags: 0x2fffc0000000000() [ 23.682460] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.690357] raw: ffffea000702fde0 ffffea0007011a60 0000000000000000 0000000000000000 [ 23.698241] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.705343] ------------[ cut here ]------------ [ 23.710077] kernel BUG at ./include/linux/mm.h:844! [ 23.715144] invalid opcode: 0000 [#1] SMP KASAN [ 23.719787] Dumping ftrace buffer: [ 23.723291] (ftrace buffer empty) [ 23.726966] Modules linked in: [ 23.730129] CPU: 1 PID: 3494 Comm: syzkaller441133 Not tainted 4.15.0-rc7+ #255 [ 23.737552] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.746884] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.751864] RSP: 0018:ffff8801c0b47510 EFLAGS: 00010203 [ 23.757195] RAX: 0000000000000000 RBX: 1ffff10038168ea4 RCX: 0000000000000000 [ 23.764435] RDX: 0000000000000000 RSI: 1ffff10038168dee RDI: ffffed0038168e90 [ 23.771676] RBP: ffff8801c0b475e8 R08: 1ffff10038168db0 R09: 0000000000000000 [ 23.778913] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038168ea8 [ 23.786150] R13: dffffc0000000000 R14: ffff8801c0b47840 R15: ffffea0007011a00 [ 23.793389] FS: 00007f97ea980700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 23.801590] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.807446] CR2: 000000002001d000 CR3: 00000001c0898004 CR4: 00000000001606e0 [ 23.814688] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.821927] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.829167] Call Trace: [ 23.831729] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.835845] ? find_held_lock+0x35/0x1d0 [ 23.839885] __do_fault+0xeb/0x30f [ 23.843390] ? perf_trace_lock+0xd6/0x900 [ 23.847515] ? vma_gap_callbacks_rotate+0x62/0x80 [ 23.852323] ? pte_offset_kernel+0xc7/0xc7 [ 23.856524] ? print_irqtrace_events+0x270/0x270 [ 23.861253] ? trace_event_raw_event_lock+0x340/0x340 [ 23.866411] ? vma_compute_subtree_gap+0x200/0x200 [ 23.871312] ? check_noncircular+0x20/0x20 [ 23.875520] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.879913] ? __pmd_alloc+0x4e0/0x4e0 [ 23.883768] ? trace_event_raw_event_lock+0x340/0x340 [ 23.888940] ? find_held_lock+0x35/0x1d0 [ 23.892973] ? handle_mm_fault+0x248/0x8d0 [ 23.897172] ? lock_downgrade+0x980/0x980 [ 23.901302] handle_mm_fault+0x334/0x8d0 [ 23.905342] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.909892] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.915750] ? find_vma+0x30/0x150 [ 23.919264] __get_user_pages+0x50c/0x15f0 [ 23.923478] ? follow_page_mask+0x17f0/0x17f0 [ 23.927946] ? lock_acquire+0x1d5/0x580 [ 23.931886] ? lock_acquire+0x1d5/0x580 [ 23.935825] ? __mm_populate+0x2c7/0x450 [ 23.939857] ? lock_release+0xa40/0xa40 [ 23.943800] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.949655] ? rcu_note_context_switch+0x710/0x710 [ 23.954556] populate_vma_page_range+0x20e/0x2f0 [ 23.959280] ? get_user_pages+0xc0/0xc0 [ 23.963224] ? vmacache_find+0x5f/0x280 [ 23.967164] ? vmacache_update+0xfe/0x130 [ 23.971281] ? find_vma+0x30/0x150 [ 23.974789] __mm_populate+0x23a/0x450 [ 23.978646] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.983541] ? down_read_killable+0x180/0x180 [ 23.988005] ? security_mmap_file+0x143/0x180 [ 23.992477] vm_mmap_pgoff+0x241/0x280 [ 23.996335] ? vma_is_stack_for_current+0xa0/0xa0 [ 24.001163] ? do_page_fault+0xee/0x720 [ 24.005114] SyS_mmap_pgoff+0x462/0x5f0 [ 24.009058] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.013783] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.018768] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.023494] SyS_mmap+0x16/0x20 [ 24.026742] entry_SYSCALL_64_fastpath+0x23/0x9a [ 24.031464] RIP: 0033:0x4493a9 [ 24.034620] RSP: 002b:00007f97ea97fd98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 24.042296] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004493a9 [ 24.049549] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 24.056789] RBP: 0000000000000000 R08: 0000000000000018 R09: 0000000000000000 [ 24.064030] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 24.071279] R13: 64696d2f7665642f R14: 6273752f7665642f R15: 0000000000000007 [ 24.078530] 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 cb 9c 94 fd 48 c7 c6 a0 b1 12 86 4c 89 ff e8 dc 89 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 a7 9c 94 fd [ 24.097638] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c0b47510 [ 24.104213] ---[ end trace 97937fecaec307ce ]--- [ 24.109100] Kernel panic - not syncing: Fatal exception [ 24.114504] Dumping ftrace buffer: [ 24.118019] (ftrace buffer empty) [ 24.121697] Kernel Offset: disabled [ 24.125305] Rebooting in 86400 seconds..