[....] Starting enhanced syslogd: rsyslogd[ 12.621994] audit: type=1400 audit(1514756491.610:5): avc: denied { syslog } for pid=3347 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: [ 18.997700] audit: type=1400 audit(1514756497.986:6): avc: denied { map } for pid=3486 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 '10.128.0.7' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 25.208194] audit: type=1400 audit(1514756504.196:7): avc: denied { map } for pid=3500 comm="syzkaller374420" path="/root/syzkaller374420317" 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 [ 25.234569] audit: type=1400 audit(1514756504.206:8): avc: denied { map } for pid=3500 comm="syzkaller374420" path="/dev/usbmon0" dev="devtmpfs" ino=8869 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 [ 25.271429] page:000000000f514af9 count:0 mapcount:0 mapping: (null) index:0x0 [ 25.279767] flags: 0x2fffc0000000000() [ 25.283691] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 25.291589] raw: ffffea0006fe6260 ffffea0006fc2ce0 0000000000000000 0000000000000000 [ 25.299515] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 25.306640] ------------[ cut here ]------------ [ 25.311377] kernel BUG at ./include/linux/mm.h:844! [ 25.316439] invalid opcode: 0000 [#1] SMP KASAN [ 25.321079] Dumping ftrace buffer: [ 25.324586] (ftrace buffer empty) [ 25.328261] Modules linked in: [ 25.331431] CPU: 1 PID: 3502 Comm: syzkaller374420 Not tainted 4.15.0-rc5+ #154 [ 25.338841] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.348175] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 25.353156] RSP: 0018:ffff8801bf317388 EFLAGS: 00010203 [ 25.358484] RAX: 0000000000000000 RBX: 1ffff10037e62e73 RCX: 0000000000000000 [ 25.365719] RDX: 0000000000000000 RSI: 1ffff10037e62dbd RDI: ffffed0037e62e60 [ 25.372955] RBP: ffff8801bf317460 R08: 1ffff10037e62d7f R09: 0000000000000000 [ 25.380199] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10037e62e77 [ 25.387436] R13: dffffc0000000000 R14: ffff8801bf3176b8 R15: ffffea0006fc1000 [ 25.394675] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7f78b40 [ 25.402867] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 25.408720] CR2: 0000000020000000 CR3: 00000001bfa47006 CR4: 00000000001606e0 [ 25.415959] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.423197] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.430433] Call Trace: [ 25.433000] ? mon_alloc_buff+0x1a0/0x1a0 [ 25.437118] ? finish_fault+0x1b4/0x2a0 [ 25.441060] ? lock_downgrade+0x980/0x980 [ 25.445174] ? do_swap_page+0x2c50/0x2c50 [ 25.449292] __do_fault+0xeb/0x30f [ 25.452800] ? pte_offset_kernel+0xc7/0xc7 [ 25.457007] ? check_noncircular+0x20/0x20 [ 25.461208] ? _raw_spin_unlock+0x22/0x30 [ 25.465322] __handle_mm_fault+0x1d8f/0x3ce0 [ 25.469698] ? __pmd_alloc+0x4e0/0x4e0 [ 25.473551] ? __save_stack_trace+0x7e/0xd0 [ 25.477930] ? find_held_lock+0x35/0x1d0 [ 25.481970] ? handle_mm_fault+0x248/0x8d0 [ 25.486173] ? lock_downgrade+0x980/0x980 [ 25.490302] handle_mm_fault+0x334/0x8d0 [ 25.494329] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.498880] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.504730] ? find_vma+0x30/0x150 [ 25.508241] __get_user_pages+0x50c/0x15f0 [ 25.512446] ? follow_page_mask+0x17f0/0x17f0 [ 25.516911] ? lock_acquire+0x1d5/0x580 [ 25.520849] ? lock_acquire+0x1d5/0x580 [ 25.524795] ? __mm_populate+0x2c7/0x450 [ 25.528825] ? lock_release+0xa40/0xa40 [ 25.532765] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.538628] ? rcu_note_context_switch+0x710/0x710 [ 25.543526] populate_vma_page_range+0x20e/0x2f0 [ 25.548249] ? get_user_pages+0xc0/0xc0 [ 25.552188] ? vmacache_find+0x5f/0x280 [ 25.556127] ? vmacache_update+0xfe/0x130 [ 25.560242] ? find_vma+0x30/0x150 [ 25.563747] __mm_populate+0x23a/0x450 [ 25.567602] ? populate_vma_page_range+0x2f0/0x2f0 [ 25.572496] ? down_read_killable+0x180/0x180 [ 25.576962] ? security_mmap_file+0x143/0x180 [ 25.581430] vm_mmap_pgoff+0x241/0x280 [ 25.585288] ? vma_is_stack_for_current+0xa0/0xa0 [ 25.590095] ? putname+0xee/0x130 [ 25.593526] ? rcu_read_lock_sched_held+0x108/0x120 [ 25.598506] ? kmem_cache_free+0x267/0x2a0 [ 25.602714] SyS_mmap_pgoff+0x462/0x5f0 [ 25.606663] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.611386] ? do_fast_syscall_32+0x156/0xf9d [ 25.615847] ? find_mergeable_anon_vma+0xd0/0xd0 [ 25.620571] do_fast_syscall_32+0x3ee/0xf9d [ 25.624883] ? do_int80_syscall_32+0x9d0/0x9d0 [ 25.629442] ? syscall_return_slowpath+0x2ad/0x550 [ 25.634337] ? prepare_exit_to_usermode+0x340/0x340 [ 25.639319] ? sysret32_from_system_call+0x5/0x3b [ 25.644143] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.648958] entry_SYSENTER_compat+0x54/0x63 [ 25.653339] RIP: 0023:0xf7f9dc79 [ 25.656684] RSP: 002b:00000000f7f781ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 25.664357] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 25.671592] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000b [ 25.678829] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 25.686076] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.693320] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.700565] 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 e0 af 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 [ 25.719641] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801bf317388 [ 25.726171] ---[ end trace e84656bd9a870193 ]--- [ 25.731067] Kernel panic - not syncing: Fatal exception [ 25.736853] Dumping ftrace buffer: [ 25.740373] (ftrace buffer empty) [ 25.744053] Kernel Offset: disabled [ 25.747646] Rebooting in 86400 seconds..