[....] Starting enhanced syslogd: rsyslogd[ 10.999737] audit: type=1400 audit(1514301253.092:5): avc: denied { syslog } for pid=3003 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: [ 17.349367] audit: type=1400 audit(1514301259.442:6): avc: denied { map } for pid=3143 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-386-4,10.128.0.25' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 23.562942] audit: type=1400 audit(1514301265.655:7): avc: denied { map } for pid=3156 comm="syzkaller870048" path="/root/syzkaller870048470" 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 [ 23.589402] audit: type=1400 audit(1514301265.655:8): avc: denied { map } for pid=3156 comm="syzkaller870048" path="/dev/usbmon0" dev="devtmpfs" ino=8926 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 [ 23.617767] page:0000000017d4184d count:0 mapcount:0 mapping: (null) index:0x0 [ 23.625966] flags: 0x2fffc0000000000() [ 23.629851] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 23.637735] raw: ffffea000725eee0 ffffea0007265c60 0000000000000000 0000000000000000 [ 23.645629] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 23.652717] ------------[ cut here ]------------ [ 23.657435] kernel BUG at ./include/linux/mm.h:844! [ 23.662451] invalid opcode: 0000 [#1] SMP KASAN [ 23.667083] Dumping ftrace buffer: [ 23.670586] (ftrace buffer empty) [ 23.674259] Modules linked in: [ 23.677420] CPU: 0 PID: 3157 Comm: syzkaller870048 Not tainted 4.15.0-rc5+ #147 [ 23.684827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 23.694161] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 23.699140] RSP: 0018:ffff8801d2f4f388 EFLAGS: 00010203 [ 23.704469] RAX: 0000000000000000 RBX: 1ffff1003a5e9e73 RCX: 0000000000000000 [ 23.711703] RDX: 0000000000000000 RSI: 1ffff1003a5e9dbd RDI: ffffed003a5e9e60 [ 23.718940] RBP: ffff8801d2f4f460 R08: 1ffff1003a5e9d7f R09: 0000000000000000 [ 23.726176] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff1003a5e9e77 [ 23.733499] R13: dffffc0000000000 R14: ffff8801d2f4f6b8 R15: ffffea0007265c00 [ 23.740733] FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:00000000f7fbab40 [ 23.748930] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 23.754783] CR2: 00000000208be000 CR3: 00000001cff6b001 CR4: 00000000001606f0 [ 23.762020] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.769253] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.776492] Call Trace: [ 23.779048] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.783159] ? find_held_lock+0x35/0x1d0 [ 23.787191] __do_fault+0xeb/0x30f [ 23.790697] ? pte_offset_kernel+0xc7/0xc7 [ 23.794901] ? rb_insert_color_cached+0x1660/0x1660 [ 23.799883] ? rcutorture_record_progress+0x10/0x10 [ 23.804863] ? check_noncircular+0x20/0x20 [ 23.809063] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.813435] ? __pmd_alloc+0x4e0/0x4e0 [ 23.817286] ? __save_stack_trace+0x7e/0xd0 [ 23.821579] ? find_held_lock+0x35/0x1d0 [ 23.825605] ? handle_mm_fault+0x248/0x8d0 [ 23.829802] ? lock_downgrade+0x980/0x980 [ 23.833931] handle_mm_fault+0x334/0x8d0 [ 23.837955] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.842499] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.848345] ? find_vma+0x30/0x150 [ 23.851851] __get_user_pages+0x50c/0x15f0 [ 23.856055] ? follow_page_mask+0x17f0/0x17f0 [ 23.860516] ? lock_acquire+0x1d5/0x580 [ 23.864453] ? lock_acquire+0x1d5/0x580 [ 23.868390] ? __mm_populate+0x2c7/0x450 [ 23.872418] ? lock_release+0xa40/0xa40 [ 23.876354] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.882209] ? rcu_note_context_switch+0x710/0x710 [ 23.887108] populate_vma_page_range+0x20e/0x2f0 [ 23.891828] ? get_user_pages+0xc0/0xc0 [ 23.895767] ? vmacache_find+0x5f/0x280 [ 23.899705] ? vmacache_update+0xfe/0x130 [ 23.903816] ? find_vma+0x30/0x150 [ 23.907322] __mm_populate+0x23a/0x450 [ 23.911176] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.916067] ? down_read_killable+0x180/0x180 [ 23.920528] ? security_mmap_file+0x143/0x180 [ 23.924989] vm_mmap_pgoff+0x241/0x280 [ 23.928843] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.933650] ? putname+0xee/0x130 [ 23.937074] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.942053] ? kmem_cache_free+0x267/0x2a0 [ 23.946259] SyS_mmap_pgoff+0x462/0x5f0 [ 23.950199] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.954924] ? do_fast_syscall_32+0x156/0xf9d [ 23.959384] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.964102] do_fast_syscall_32+0x3ee/0xf9d [ 23.968392] ? do_int80_syscall_32+0x9d0/0x9d0 [ 23.972941] ? syscall_return_slowpath+0x2ad/0x550 [ 23.977837] ? prepare_exit_to_usermode+0x340/0x340 [ 23.982819] ? sysret32_from_system_call+0x5/0x3b [ 23.987627] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 23.992438] entry_SYSENTER_compat+0x54/0x63 [ 23.996816] RIP: 0023:0xf7fbec79 [ 24.000142] RSP: 002b:00000000f7fba1ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 [ 24.007821] RAX: ffffffffffffffda RBX: 0000000020ac6000 RCX: 0000000000004000 [ 24.015056] RDX: 0000000001000004 RSI: 0000000000008011 RDI: 000000000000000c [ 24.022288] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 24.029521] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 24.036756] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 24.043998] 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 [ 24.063067] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801d2f4f388 [ 24.069576] ---[ end trace b247cfd0571c8fe4 ]--- [ 24.074311] Kernel panic - not syncing: Fatal exception [ 24.079675] Dumping ftrace buffer: [ 24.083180] (ftrace buffer empty) [ 24.086855] Kernel Offset: disabled [ 24.090447] Rebooting in 86400 seconds..