[....] Starting enhanced syslogd: rsyslogd[ 11.305602] audit: type=1400 audit(1515464665.841:5): avc: denied { syslog } for pid=3343 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: [ 17.178591] audit: type=1400 audit(1515464671.714:6): avc: denied { map } for pid=3482 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 '10.128.15.221' (ECDSA) to the list of known hosts. executing program executing program executing program [ 23.386417] audit: type=1400 audit(1515464677.922:7): avc: denied { map } for pid=3496 comm="syzkaller180448" path="/root/syzkaller180448505" 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 [ 23.412594] audit: type=1400 audit(1515464677.922:8): avc: denied { map } for pid=3496 comm="syzkaller180448" path="/dev/usbmon0" dev="devtmpfs" ino=1063 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 [ 23.445531] page:ffffea0007020f00 count:0 mapcount:0 mapping: (null) index:0x0 [ 23.453835] flags: 0x2fffc0000000000() [ 23.457985] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.465896] raw: ffffea0007022320 ffffea0007020f60 0000000000000000 0000000000000000 [ 23.473804] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.480928] ------------[ cut here ]------------ [ 23.485656] kernel BUG at ./include/linux/mm.h:844! [ 23.490697] invalid opcode: 0000 [#1] SMP KASAN [ 23.495341] Dumping ftrace buffer: [ 23.498850] (ftrace buffer empty) [ 23.502527] Modules linked in: [ 23.505691] CPU: 0 PID: 3497 Comm: syzkaller180448 Not tainted 4.15.0-rc6-next-20180108+ #91 [ 23.514229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.523558] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.528539] RSP: 0018:ffff8801c0f87510 EFLAGS: 00010203 [ 23.533866] RAX: 0000000000000000 RBX: 1ffff100381f0ea4 RCX: 0000000000000000 [ 23.541104] RDX: 0000000000000000 RSI: 1ffff100381f0db8 RDI: ffffed00381f0e90 [ 23.548339] RBP: ffff8801c0f875e8 R08: 1ffff100381f0db0 R09: 0000000000000000 [ 23.555575] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100381f0ea8 [ 23.562810] R13: dffffc0000000000 R14: ffff8801c0f87840 R15: ffffea0007020f00 [ 23.570048] FS: 00007f6920fc9700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 23.578240] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.584087] CR2: 00000000208be000 CR3: 00000001c14aa002 CR4: 00000000001606f0 [ 23.591325] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.598560] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.605795] Call Trace: [ 23.608355] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.612472] ? find_held_lock+0x35/0x1d0 [ 23.616518] __do_fault+0xeb/0x315 [ 23.620025] ? vma_gap_callbacks_rotate+0x62/0x80 [ 23.624835] ? pte_offset_kernel+0xc7/0xc7 [ 23.629036] ? print_irqtrace_events+0x270/0x270 [ 23.633757] ? rb_insert_color_cached+0x1660/0x1660 [ 23.638739] ? vma_compute_subtree_gap+0x200/0x200 [ 23.643632] ? rb_insert_color_cached+0x1660/0x1660 [ 23.648615] ? check_noncircular+0x20/0x20 [ 23.653339] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.657716] ? __pmd_alloc+0x4e0/0x4e0 [ 23.661571] ? find_held_lock+0x35/0x1d0 [ 23.665603] ? handle_mm_fault+0x2a0/0x930 [ 23.669814] ? lock_downgrade+0x980/0x980 [ 23.673940] handle_mm_fault+0x38f/0x930 [ 23.677981] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.682534] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.688385] ? find_vma+0x30/0x150 [ 23.691895] __get_user_pages+0x50c/0x15f0 [ 23.696111] ? follow_page_mask+0x17f0/0x17f0 [ 23.700581] ? vma_link+0xe9/0x170 [ 23.704100] ? lock_acquire+0x1d5/0x580 [ 23.708039] ? lock_acquire+0x1d5/0x580 [ 23.711981] ? __mm_populate+0x2c7/0x450 [ 23.716012] ? lock_release+0xa40/0xa40 [ 23.719955] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.725806] ? rcu_note_context_switch+0x710/0x710 [ 23.730706] populate_vma_page_range+0x20e/0x2f0 [ 23.735433] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 23.740325] ? vmacache_find+0x5f/0x280 [ 23.744285] ? vmacache_update+0xfe/0x130 [ 23.748402] ? find_vma+0x30/0x150 [ 23.751911] __mm_populate+0x23a/0x450 [ 23.755768] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.760672] ? down_read_killable+0x180/0x180 [ 23.765136] ? security_mmap_file+0x143/0x180 [ 23.769602] vm_mmap_pgoff+0x241/0x280 [ 23.773467] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.778278] ? putname+0xee/0x130 [ 23.781696] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.786678] ? kmem_cache_free+0x273/0x2b0 [ 23.790882] SyS_mmap_pgoff+0x462/0x5f0 [ 23.794823] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.799543] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.804526] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.809253] SyS_mmap+0x16/0x20 [ 23.812500] entry_SYSCALL_64_fastpath+0x23/0x9a [ 23.817221] RIP: 0033:0x449b99 [ 23.820378] RSP: 002b:00007f6920fc8d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 23.828054] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 0000000000449b99 [ 23.835292] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.842528] RBP: 00000000006dbc20 R08: 0000000000000018 R09: 0000000000000000 [ 23.849765] R10: 0000000000008011 R11: 0000000000000212 R12: 78756e696c65732f [ 23.857011] R13: 7361682f6376612f R14: 6273752f7665642f R15: 000000000000000b [ 23.864257] 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 33 90 fd 48 c7 c6 20 0d 13 86 4c 89 ff e8 fc 1e ba fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 a7 33 90 fd [ 23.883330] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c0f87510 [ 23.889874] ---[ end trace 98c80a475d9dd438 ]--- [ 23.895131] Kernel panic - not syncing: Fatal exception [ 23.900814] Dumping ftrace buffer: [ 23.904332] (ftrace buffer empty) [ 23.908012] Kernel Offset: disabled [ 23.911606] Rebooting in 86400 seconds..