[....] Starting enhanced syslogd: rsyslogd[ 11.887614] audit: type=1400 audit(1514804932.151:5): avc: denied { syslog } for pid=3344 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: [ 18.441911] audit: type=1400 audit(1514804938.705:6): avc: denied { map } for pid=3484 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 '10.128.15.229' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 30.662543] audit: type=1400 audit(1514804950.926:7): avc: denied { map } for pid=3500 comm="syzkaller867633" path="/root/syzkaller867633465" 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 [ 30.688635] audit: type=1400 audit(1514804950.934:8): avc: denied { map } for pid=3500 comm="syzkaller867633" path="/dev/usbmon0" dev="devtmpfs" ino=8907 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 [ 30.721018] page:00000000a0a88fac count:0 mapcount:0 mapping: (null) index:0x0 [ 30.729224] flags: 0x2fffc0000000000() [ 30.733203] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 30.741082] raw: ffffea0007005c60 ffffea0006ff0a60 0000000000000000 0000000000000000 [ 30.748951] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 30.756059] ------------[ cut here ]------------ [ 30.760788] kernel BUG at ./include/linux/mm.h:844! [ 30.765807] invalid opcode: 0000 [#1] SMP KASAN [ 30.770441] Dumping ftrace buffer: [ 30.773952] (ftrace buffer empty) [ 30.777630] Modules linked in: [ 30.780790] CPU: 1 PID: 3501 Comm: syzkaller867633 Not tainted 4.15.0-rc6+ #155 [ 30.788372] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.800891] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 30.806476] RSP: 0018:ffff8801c4417388 EFLAGS: 00010203 [ 30.811805] RAX: 0000000000000000 RBX: 1ffff10038882e73 RCX: 0000000000000000 [ 30.819041] RDX: 0000000000000000 RSI: 1ffff10038882dbd RDI: ffffed0038882e60 [ 30.826277] RBP: ffff8801c4417460 R08: 1ffff10038882d7f R09: 0000000000000000 [ 30.833511] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10038882e77 [ 30.840745] R13: dffffc0000000000 R14: ffff8801c44176b8 R15: ffffea0006ff0a00 [ 30.848239] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f2db40 [ 30.856426] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.862272] CR2: 00000000208be000 CR3: 00000001d5025001 CR4: 00000000001606e0 [ 30.869507] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.876741] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.884676] Call Trace: [ 30.887232] ? mon_alloc_buff+0x1a0/0x1a0 [ 30.891345] ? find_held_lock+0x35/0x1d0 [ 30.895386] __do_fault+0xeb/0x30f [ 30.898898] ? pte_offset_kernel+0xc7/0xc7 [ 30.903097] ? rb_insert_color_cached+0x1660/0x1660 [ 30.908077] ? rcutorture_record_progress+0x10/0x10 [ 30.913055] ? check_noncircular+0x20/0x20 [ 30.917256] __handle_mm_fault+0x1d8f/0x3ce0 [ 30.921628] ? __pmd_alloc+0x4e0/0x4e0 [ 30.925478] ? __save_stack_trace+0x7e/0xd0 [ 30.929767] ? find_held_lock+0x35/0x1d0 [ 30.933796] ? handle_mm_fault+0x248/0x8d0 [ 30.938000] ? lock_downgrade+0x980/0x980 [ 30.942123] handle_mm_fault+0x334/0x8d0 [ 30.946149] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 30.950695] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 30.956889] ? find_vma+0x30/0x150 [ 30.960397] __get_user_pages+0x50c/0x15f0 [ 30.964601] ? follow_page_mask+0x17f0/0x17f0 [ 30.969062] ? lock_acquire+0x1d5/0x580 [ 30.973006] ? lock_acquire+0x1d5/0x580 [ 30.976950] ? __mm_populate+0x2c7/0x450 [ 30.980980] ? lock_release+0xa40/0xa40 [ 30.984919] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 30.991203] ? rcu_note_context_switch+0x710/0x710 [ 30.996098] populate_vma_page_range+0x20e/0x2f0 [ 31.000824] ? get_user_pages+0xc0/0xc0 [ 31.004762] ? vmacache_find+0x5f/0x280 [ 31.008705] ? vmacache_update+0xfe/0x130 [ 31.012819] ? find_vma+0x30/0x150 [ 31.016326] __mm_populate+0x23a/0x450 [ 31.020180] ? populate_vma_page_range+0x2f0/0x2f0 [ 31.026121] ? down_read_killable+0x180/0x180 [ 31.030585] ? security_mmap_file+0x143/0x180 [ 31.035050] vm_mmap_pgoff+0x241/0x280 [ 31.038907] ? vma_is_stack_for_current+0xa0/0xa0 [ 31.043714] ? putname+0xee/0x130 [ 31.047838] ? rcu_read_lock_sched_held+0x108/0x120 [ 31.052817] ? kmem_cache_free+0x267/0x2a0 [ 31.057022] SyS_mmap_pgoff+0x462/0x5f0 [ 31.060964] ? find_mergeable_anon_vma+0xd0/0xd0 [ 31.065685] ? do_fast_syscall_32+0x156/0xf9d [ 31.070144] ? find_mergeable_anon_vma+0xd0/0xd0 [ 31.074865] do_fast_syscall_32+0x3ee/0xf9d [ 31.079153] ? do_int80_syscall_32+0x9d0/0x9d0 [ 31.083702] ? syscall_return_slowpath+0x2ad/0x550 [ 31.088594] ? prepare_exit_to_usermode+0x340/0x340 [ 31.093574] ? sysret32_from_system_call+0x5/0x3b [ 31.098383] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.103194] entry_SYSENTER_compat+0x54/0x63 [ 31.107567] RIP: 0023:0xf7f31c79 [ 31.110897] RSP: 002b:00000000f7f2d1ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 31.118568] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 31.125801] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000e [ 31.135030] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 31.142272] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.149689] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.156931] 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 2b b0 94 fd 48 c7 c6 20 b1 12 86 4c 89 ff e8 bc 98 bd fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 07 b0 94 fd [ 31.176873] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c4417388 [ 31.183388] ---[ end trace c6de0124a5a55bda ]--- [ 31.188282] Kernel panic - not syncing: Fatal exception [ 31.193663] Dumping ftrace buffer: [ 31.197171] (ftrace buffer empty) [ 31.200847] Kernel Offset: disabled [ 31.204441] Rebooting in 86400 seconds..