[....] Starting enhanced syslogd: rsyslogd[ 11.128938] audit: type=1400 audit(1514256852.818:5): avc: denied { syslog } for pid=2993 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: [ 16.214819] audit: type=1400 audit(1514256857.904:6): avc: denied { map } for pid=3133 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-386-1,10.128.15.244' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 22.386953] audit: type=1400 audit(1514256864.076:7): avc: denied { map } for pid=3147 comm="syzkaller396945" path="/root/syzkaller396945475" 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 [ 22.413079] audit: type=1400 audit(1514256864.076:8): avc: denied { map } for pid=3147 comm="syzkaller396945" path="/dev/usbmon0" dev="devtmpfs" ino=1130 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 [ 22.439812] page:000000002a59b573 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.448042] flags: 0x2fffc0000000000() [ 22.452100] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.460009] raw: ffffea000725cae0 ffffea0007268320 0000000000000000 0000000000000000 [ 22.467914] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.475069] ------------[ cut here ]------------ [ 22.479807] kernel BUG at ./include/linux/mm.h:844! [ 22.484825] invalid opcode: 0000 [#1] SMP KASAN [ 22.489470] Dumping ftrace buffer: [ 22.492974] (ftrace buffer empty) [ 22.496663] Modules linked in: [ 22.499825] CPU: 0 PID: 3148 Comm: syzkaller396945 Not tainted 4.15.0-rc5+ #147 [ 22.507263] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.516591] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.521570] RSP: 0018:ffff8801c8577388 EFLAGS: 00010203 [ 22.526899] RAX: 0000000000000000 RBX: 1ffff100390aee73 RCX: 0000000000000000 [ 22.534137] RDX: 0000000000000000 RSI: 1ffff100390aedbd RDI: ffffed00390aee60 [ 22.541373] RBP: ffff8801c8577460 R08: 1ffff100390aed7f R09: 0000000000000000 [ 22.548611] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff100390aee77 [ 22.555848] R13: dffffc0000000000 R14: ffff8801c85776b8 R15: ffffea000729d8c0 [ 22.563088] FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:00000000f7fccb40 [ 22.571289] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 22.577138] CR2: 0000558ec73450b8 CR3: 00000001d5c09002 CR4: 00000000001606f0 [ 22.584374] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.591611] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.598846] Call Trace: [ 22.601403] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.605520] ? find_held_lock+0x35/0x1d0 [ 22.609555] __do_fault+0xeb/0x30f [ 22.613063] ? pte_offset_kernel+0xc7/0xc7 [ 22.617265] ? rb_insert_color_cached+0x1660/0x1660 [ 22.622248] ? rcutorture_record_progress+0x10/0x10 [ 22.627233] ? check_noncircular+0x20/0x20 [ 22.631436] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.635813] ? __pmd_alloc+0x4e0/0x4e0 [ 22.639667] ? __save_stack_trace+0x7e/0xd0 [ 22.643959] ? find_held_lock+0x35/0x1d0 [ 22.647990] ? handle_mm_fault+0x248/0x8d0 [ 22.652194] ? lock_downgrade+0x980/0x980 [ 22.656316] ? sync_mm_rss+0x113/0x180 [ 22.660172] handle_mm_fault+0x334/0x8d0 [ 22.664201] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.668748] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.674599] ? find_vma+0x30/0x150 [ 22.678117] __get_user_pages+0x50c/0x15f0 [ 22.682327] ? follow_page_mask+0x17f0/0x17f0 [ 22.686802] ? lock_acquire+0x1d5/0x580 [ 22.690741] ? lock_acquire+0x1d5/0x580 [ 22.694679] ? __mm_populate+0x2c7/0x450 [ 22.698708] ? lock_release+0xa40/0xa40 [ 22.702649] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.708507] ? rcu_note_context_switch+0x710/0x710 [ 22.713415] populate_vma_page_range+0x20e/0x2f0 [ 22.718139] ? get_user_pages+0xc0/0xc0 [ 22.722080] ? vmacache_find+0x5f/0x280 [ 22.726026] ? vmacache_update+0xfe/0x130 [ 22.730143] ? find_vma+0x30/0x150 [ 22.733650] __mm_populate+0x23a/0x450 [ 22.737509] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.742404] ? down_read_killable+0x180/0x180 [ 22.746870] ? security_mmap_file+0x143/0x180 [ 22.751345] vm_mmap_pgoff+0x241/0x280 [ 22.755211] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.760030] ? putname+0xee/0x130 [ 22.763469] ? rcu_read_lock_sched_held+0x108/0x120 [ 22.768458] ? kmem_cache_free+0x267/0x2a0 [ 22.772683] SyS_mmap_pgoff+0x462/0x5f0 [ 22.776629] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.781355] ? do_fast_syscall_32+0x156/0xf9d [ 22.785821] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.790549] do_fast_syscall_32+0x3ee/0xf9d [ 22.794840] ? do_int80_syscall_32+0x9d0/0x9d0 [ 22.799393] ? syscall_return_slowpath+0x2ad/0x550 [ 22.804293] ? prepare_exit_to_usermode+0x340/0x340 [ 22.809279] ? sysret32_from_system_call+0x5/0x3b [ 22.814091] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 22.818903] entry_SYSENTER_compat+0x54/0x63 [ 22.823277] RIP: 0023:0xf7fd0c79 [ 22.826607] RSP: 002b:00000000f7fcc1ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 22.834280] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 22.841515] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 0000000000000016 [ 22.848753] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 22.855989] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 22.863240] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 22.870482] 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 [ 22.889550] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8577388 [ 22.896066] ---[ end trace ce1dbbc0406d98c9 ]--- [ 22.900838] Kernel panic - not syncing: Fatal exception [ 22.906616] Dumping ftrace buffer: [ 22.910135] (ftrace buffer empty) [ 22.913813] Kernel Offset: disabled [ 22.917410] Rebooting in 86400 seconds..