[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 11.622939] mcstransd (3062) used greatest stack depth: 14944 bytes left 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: [ 17.814608] audit: type=1400 audit(1514854307.209:6): avc: denied { map } for pid=3138 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 '10.128.15.218' (ECDSA) to the list of known hosts. executing program [ 24.023280] audit: type=1400 audit(1514854313.418:7): avc: denied { map } for pid=3152 comm="syzkaller408503" path="/root/syzkaller408503700" 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 executing program executing program executing program [ 24.050648] audit: type=1400 audit(1514854313.445:8): avc: denied { map } for pid=3152 comm="syzkaller408503" path="/dev/usbmon0" dev="devtmpfs" ino=8879 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 [ 24.089967] page:000000002d476067 count:0 mapcount:0 mapping: (null) index:0x0 [ 24.098301] flags: 0x2fffc0000000000() [ 24.102397] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 24.110342] raw: ffffea000724a7e0 ffffea0006f45ee0 0000000000000000 0000000000000000 [ 24.118245] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 24.125404] ------------[ cut here ]------------ [ 24.130143] kernel BUG at ./include/linux/mm.h:844! [ 24.135182] invalid opcode: 0000 [#1] SMP KASAN [ 24.139832] Dumping ftrace buffer: [ 24.143337] (ftrace buffer empty) [ 24.147017] Modules linked in: [ 24.150181] CPU: 1 PID: 3153 Comm: syzkaller408503 Not tainted 4.15.0-rc4-next-20171221+ #78 [ 24.158721] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.168051] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 24.173032] RSP: 0018:ffff8801c931f510 EFLAGS: 00010203 [ 24.178361] RAX: 0000000000000000 RBX: 1ffff10039263ea4 RCX: 0000000000000000 [ 24.185596] RDX: 0000000000000000 RSI: 1ffff10039263dee RDI: ffffed0039263e90 [ 24.192831] RBP: ffff8801c931f5e8 R08: 1ffff10039263db0 R09: 0000000000000000 [ 24.200069] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039263ea8 [ 24.207305] R13: dffffc0000000000 R14: ffff8801c931f840 R15: ffffea0007248280 [ 24.214543] FS: 00007fdbcf9a9700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 24.222758] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.228605] CR2: 00000000208be000 CR3: 00000001c9bce001 CR4: 00000000001606e0 [ 24.235843] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.243078] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.250313] Call Trace: [ 24.252876] ? mon_alloc_buff+0x1a0/0x1a0 [ 24.256998] ? finish_fault+0x1b4/0x2a0 [ 24.260945] ? lock_downgrade+0x980/0x980 [ 24.265058] ? do_swap_page+0x2a10/0x2a10 [ 24.269172] __do_fault+0xeb/0x30f [ 24.272681] ? pte_offset_kernel+0xc7/0xc7 [ 24.276885] ? vma_compute_subtree_gap+0x200/0x200 [ 24.281780] ? check_noncircular+0x20/0x20 [ 24.285982] ? _raw_spin_unlock+0x22/0x30 [ 24.290105] __handle_mm_fault+0x1d8f/0x3ce0 [ 24.294482] ? __pmd_alloc+0x4e0/0x4e0 [ 24.298339] ? find_held_lock+0x35/0x1d0 [ 24.302369] ? handle_mm_fault+0x2a0/0x930 [ 24.306569] ? lock_downgrade+0x980/0x980 [ 24.310692] handle_mm_fault+0x38f/0x930 [ 24.314721] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 24.319269] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.325119] ? find_vma+0x30/0x150 [ 24.328629] __get_user_pages+0x50c/0x15f0 [ 24.332836] ? follow_page_mask+0x17f0/0x17f0 [ 24.337297] ? vma_link+0xe9/0x170 [ 24.340806] ? lock_acquire+0x1d5/0x580 [ 24.344755] ? lock_acquire+0x1d5/0x580 [ 24.348713] ? __mm_populate+0x2c7/0x450 [ 24.352743] ? lock_release+0xa40/0xa40 [ 24.356682] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 24.362533] ? rcu_note_context_switch+0x710/0x710 [ 24.367433] populate_vma_page_range+0x20e/0x2f0 [ 24.372165] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 24.377061] ? vmacache_find+0x5f/0x280 [ 24.381002] ? vmacache_update+0xfe/0x130 [ 24.385120] ? find_vma+0x30/0x150 [ 24.388628] __mm_populate+0x23a/0x450 [ 24.392485] ? populate_vma_page_range+0x2f0/0x2f0 [ 24.397379] ? down_read_killable+0x180/0x180 [ 24.401843] ? security_mmap_file+0x143/0x180 [ 24.406313] vm_mmap_pgoff+0x241/0x280 [ 24.410171] ? vma_is_stack_for_current+0xa0/0xa0 [ 24.414982] ? ___sys_recvmsg+0x640/0x640 [ 24.419099] ? selinux_capable+0x40/0x40 [ 24.423131] SyS_mmap_pgoff+0x462/0x5f0 [ 24.427074] ? find_mergeable_anon_vma+0xd0/0xd0 [ 24.431800] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 24.436785] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 24.441513] SyS_mmap+0x16/0x20 [ 24.444759] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 24.449479] RIP: 0033:0x449579 [ 24.452635] RSP: 002b:00007fdbcf9a8cd8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 24.460309] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449579 [ 24.467543] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 24.474779] RBP: 00000000006dac20 R08: 0000000000000015 R09: 0000000000000000 [ 24.482016] R10: 0000000000008011 R11: 0000000000000216 R12: 0000000000000000 [ 24.489257] R13: 00007ffdd8ab35af R14: 00007fdbcf9a99c0 R15: 000000000000000b [ 24.496504] 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 [ 24.515578] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c931f510 [ 24.522116] ---[ end trace 1ee3b4b22ad4df5f ]--- [ 24.527086] Kernel panic - not syncing: Fatal exception [ 24.532888] Dumping ftrace buffer: [ 24.536395] (ftrace buffer empty) [ 24.540070] Kernel Offset: disabled [ 24.543666] Rebooting in 86400 seconds..