[....] Starting enhanced syslogd: rsyslogd[ 11.875409] audit: type=1400 audit(1514351329.262:5): 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 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: [ 16.568878] audit: type=1400 audit(1514351333.955:6): 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-386-1,10.128.0.37' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 24.905962] audit: type=1400 audit(1514351342.292:7): avc: denied { map } for pid=3148 comm="syzkaller338705" path="/root/syzkaller338705828" 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 [ 24.932138] audit: type=1400 audit(1514351342.292:8): avc: denied { map } for pid=3148 comm="syzkaller338705" path="/dev/usbmon0" dev="devtmpfs" ino=1127 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 [ 24.979850] page:00000000fda33630 count:0 mapcount:0 mapping: (null) index:0x0 [ 24.988131] flags: 0x2fffc0000000000() [ 24.992055] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.999995] raw: ffffea00072c4420 ffffea00072593e0 0000000000000000 0000000000000000 [ 25.007916] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 25.015016] ------------[ cut here ]------------ [ 25.019740] kernel BUG at ./include/linux/mm.h:844! [ 25.024779] invalid opcode: 0000 [#1] SMP KASAN [ 25.029418] Dumping ftrace buffer: [ 25.032925] (ftrace buffer empty) [ 25.036603] Modules linked in: [ 25.039767] CPU: 0 PID: 3149 Comm: syzkaller338705 Not tainted 4.15.0-rc5+ #148 [ 25.047186] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.056516] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 25.061495] RSP: 0018:ffff8801c8827388 EFLAGS: 00010203 [ 25.066821] RAX: 0000000000000000 RBX: 1ffff10039104e73 RCX: 0000000000000000 [ 25.074058] RDX: 0000000000000000 RSI: 1ffff10039104dbd RDI: ffffed0039104e60 [ 25.081295] RBP: ffff8801c8827460 R08: 1ffff10039104d7f R09: 0000000000000000 [ 25.088533] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039104e77 [ 25.095779] R13: dffffc0000000000 R14: ffff8801c88276b8 R15: ffffea00076c7740 [ 25.103021] FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:00000000f7f06b40 [ 25.111214] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.117061] CR2: 00000000208be000 CR3: 00000001c962e005 CR4: 00000000001606f0 [ 25.124300] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.131535] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.138770] Call Trace: [ 25.141327] ? mon_alloc_buff+0x1a0/0x1a0 [ 25.145444] ? find_held_lock+0x35/0x1d0 [ 25.149480] __do_fault+0xeb/0x30f [ 25.152989] ? pte_offset_kernel+0xc7/0xc7 [ 25.157192] ? rb_insert_color_cached+0x1660/0x1660 [ 25.162175] ? rcutorture_record_progress+0x10/0x10 [ 25.167157] ? check_noncircular+0x20/0x20 [ 25.171362] __handle_mm_fault+0x1d8f/0x3ce0 [ 25.175739] ? __pmd_alloc+0x4e0/0x4e0 [ 25.179605] ? __save_stack_trace+0x7e/0xd0 [ 25.183897] ? find_held_lock+0x35/0x1d0 [ 25.187929] ? handle_mm_fault+0x248/0x8d0 [ 25.192129] ? lock_downgrade+0x980/0x980 [ 25.196258] handle_mm_fault+0x334/0x8d0 [ 25.200286] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.205100] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.211135] ? find_vma+0x30/0x150 [ 25.214651] __get_user_pages+0x50c/0x15f0 [ 25.218861] ? follow_page_mask+0x17f0/0x17f0 [ 25.223336] ? lock_acquire+0x1d5/0x580 [ 25.227279] ? lock_acquire+0x1d5/0x580 [ 25.231222] ? __mm_populate+0x2c7/0x450 [ 25.235256] ? lock_release+0xa40/0xa40 [ 25.239201] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.245055] ? rcu_note_context_switch+0x710/0x710 [ 25.249956] populate_vma_page_range+0x20e/0x2f0 [ 25.254682] ? get_user_pages+0xc0/0xc0 [ 25.258623] ? vmacache_find+0x5f/0x280 [ 25.262566] ? vmacache_update+0xfe/0x130 [ 25.266683] ? find_vma+0x30/0x150 [ 25.270191] __mm_populate+0x23a/0x450 [ 25.274049] ? populate_vma_page_range+0x2f0/0x2f0 [ 25.278946] ? down_read_killable+0x180/0x180 [ 25.283411] ? security_mmap_file+0x143/0x180 [ 25.287881] vm_mmap_pgoff+0x241/0x280 [ 25.291742] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.296552] ? putname+0xee/0x130 [ 25.299973] ? rcu_read_lock_sched_held+0x108/0x120 [ 25.304956] ? kmem_cache_free+0x267/0x2a0 [ 25.309165] SyS_mmap_pgoff+0x462/0x5f0 [ 25.313111] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.317836] ? do_fast_syscall_32+0x156/0xf9d [ 25.322299] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.327025] do_fast_syscall_32+0x3ee/0xf9d [ 25.331318] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.335869] ? syscall_return_slowpath+0x2ad/0x550 [ 25.340764] ? prepare_exit_to_usermode+0x340/0x340 [ 25.345748] ? sysret32_from_system_call+0x5/0x3b [ 25.350559] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.355389] entry_SYSENTER_compat+0x54/0x63 [ 25.359772] RIP: 0023:0xf7f0ac79 [ 25.363110] RSP: 002b:00000000f7f061ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 25.370832] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 25.378078] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000b [ 25.385319] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 25.392556] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.399792] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.407037] 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 [ 25.426105] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c8827388 [ 25.432652] ---[ end trace 8613996f5aca11e3 ]--- [ 25.437399] Kernel panic - not syncing: Fatal exception [ 25.442763] Dumping ftrace buffer: [ 25.446275] (ftrace buffer empty) [ 25.449952] Kernel Offset: disabled [ 25.453546] Rebooting in 86400 seconds..