[?25l[?1c7[ ok 8[?25h[?0c. [ 11.603811] mcstransd (3044) used greatest stack depth: 15488 bytes left 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: [ 16.513726] audit: type=1400 audit(1514242302.093:6): avc: denied { map } for pid=3139 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-next-kasan-gce-6,10.128.0.41' (ECDSA) to the list of known hosts. executing program executing program executing program executing program [ 22.785472] audit: type=1400 audit(1514242308.365:7): avc: denied { map } for pid=3153 comm="syzkaller058503" path="/root/syzkaller058503535" 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 executing program [ 22.811601] audit: type=1400 audit(1514242308.383:8): avc: denied { map } for pid=3153 comm="syzkaller058503" path="/dev/usbmon0" dev="devtmpfs" ino=8890 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 [ 22.866216] page:00000000a7ebaa26 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.874503] flags: 0x2fffc0000000000() [ 22.878404] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.886312] raw: ffffea0007276ba0 ffffea0007244a60 0000000000000000 0000000000000000 [ 22.894224] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.901332] ------------[ cut here ]------------ [ 22.906069] kernel BUG at ./include/linux/mm.h:844! [ 22.911111] invalid opcode: 0000 [#1] SMP KASAN [ 22.915747] Dumping ftrace buffer: [ 22.919255] (ftrace buffer empty) [ 22.922937] Modules linked in: [ 22.926113] CPU: 0 PID: 3154 Comm: syzkaller058503 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 22.934656] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.943988] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.948970] RSP: 0018:ffff8801c833f510 EFLAGS: 00010203 [ 22.954301] RAX: 0000000000000000 RBX: 1ffff10039067ea4 RCX: 0000000000000000 [ 22.961543] RDX: 0000000000000000 RSI: 1ffff10039067dee RDI: ffffed0039067e90 [ 22.968782] RBP: ffff8801c833f5e8 R08: 1ffff10039067db0 R09: 0000000000000000 [ 22.976016] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039067ea8 [ 22.983250] R13: dffffc0000000000 R14: ffff8801c833f840 R15: ffffea000725b200 [ 22.990487] FS: 00007fc7e6d6c700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 22.998678] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.004524] CR2: 0000000020000ff3 CR3: 00000001cb064005 CR4: 00000000001606f0 [ 23.011760] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 23.018996] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 23.026232] Call Trace: [ 23.028794] ? mon_alloc_buff+0x1a0/0x1a0 [ 23.032910] ? finish_fault+0x1b4/0x2a0 [ 23.036857] ? lock_downgrade+0x980/0x980 [ 23.040969] ? do_swap_page+0x2a10/0x2a10 [ 23.045094] __do_fault+0xeb/0x30f [ 23.048601] ? pte_offset_kernel+0xc7/0xc7 [ 23.052804] ? vma_compute_subtree_gap+0x200/0x200 [ 23.057707] ? check_noncircular+0x20/0x20 [ 23.061916] ? _raw_spin_unlock+0x22/0x30 [ 23.066039] __handle_mm_fault+0x1d8f/0x3ce0 [ 23.070417] ? __pmd_alloc+0x4e0/0x4e0 [ 23.074278] ? find_held_lock+0x35/0x1d0 [ 23.078312] ? handle_mm_fault+0x2a0/0x930 [ 23.082513] ? lock_downgrade+0x980/0x980 [ 23.086634] handle_mm_fault+0x38f/0x930 [ 23.090660] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 23.095207] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.101055] ? find_vma+0x30/0x150 [ 23.104563] __get_user_pages+0x50c/0x15f0 [ 23.108784] ? follow_page_mask+0x17f0/0x17f0 [ 23.113251] ? vma_link+0xe9/0x170 [ 23.116764] ? lock_acquire+0x1d5/0x580 [ 23.120713] ? lock_acquire+0x1d5/0x580 [ 23.124656] ? __mm_populate+0x2c7/0x450 [ 23.128687] ? lock_release+0xa40/0xa40 [ 23.132634] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 23.138496] ? rcu_note_context_switch+0x710/0x710 [ 23.143401] populate_vma_page_range+0x20e/0x2f0 [ 23.148126] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 23.153024] ? vmacache_find+0x5f/0x280 [ 23.156964] ? vmacache_update+0xfe/0x130 [ 23.161077] ? find_vma+0x30/0x150 [ 23.164584] __mm_populate+0x23a/0x450 [ 23.168440] ? populate_vma_page_range+0x2f0/0x2f0 [ 23.173334] ? down_read_killable+0x180/0x180 [ 23.177799] ? security_mmap_file+0x143/0x180 [ 23.182268] vm_mmap_pgoff+0x241/0x280 [ 23.186137] ? vma_is_stack_for_current+0xa0/0xa0 [ 23.190953] ? putname+0xee/0x130 [ 23.194373] ? rcu_read_lock_sched_held+0x108/0x120 [ 23.199363] ? kmem_cache_free+0x267/0x2a0 [ 23.203569] SyS_mmap_pgoff+0x462/0x5f0 [ 23.207509] ? find_mergeable_anon_vma+0xd0/0xd0 [ 23.212240] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 23.217224] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 23.221950] SyS_mmap+0x16/0x20 [ 23.225198] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 23.229920] RIP: 0033:0x4497d9 [ 23.233077] RSP: 002b:00007fc7e6d6bcd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 23.240752] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004497d9 [ 23.247991] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 23.255225] RBP: 00000000006dac20 R08: 000000000000000d R09: 0000000000000000 [ 23.262459] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 23.269693] R13: 00007ffcb74f8cff R14: 00007fc7e6d6c9c0 R15: 0000000000000009 [ 23.276937] 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 eb f2 96 fd 48 c7 c6 20 1f d1 85 4c 89 ff e8 8c b4 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 c7 f2 96 fd [ 23.296093] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c833f510 [ 23.302627] ---[ end trace d9e4af2939d523bc ]--- [ 23.307377] Kernel panic - not syncing: Fatal exception [ 23.312739] Dumping ftrace buffer: [ 23.316247] (ftrace buffer empty) [ 23.319926] Kernel Offset: disabled [ 23.323521] Rebooting in 86400 seconds..