[....] Starting enhanced syslogd: rsyslogd[ 10.097311] audit: type=1400 audit(1514381457.446:5): avc: denied { syslog } for pid=2986 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: [ 15.713625] audit: type=1400 audit(1514381463.062:6): avc: denied { map } for pid=3127 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 21.873438] audit: type=1400 audit(1514381469.222:7): avc: denied { map } for pid=3141 comm="syzkaller796331" path="/root/syzkaller796331225" 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 [ 21.899493] audit: type=1400 audit(1514381469.222:8): avc: denied { map } for pid=3141 comm="syzkaller796331" path="/dev/usbmon0" dev="devtmpfs" ino=8877 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 [ 21.935725] page:ffffea0007356140 count:0 mapcount:0 mapping: (null) index:0x0 [ 21.943979] flags: 0x2fffc0000000000() [ 21.947915] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 21.955845] raw: ffffea0007223720 ffffea000722cea0 0000000000000000 0000000000000000 [ 21.965147] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 21.972242] ------------[ cut here ]------------ [ 21.976999] kernel BUG at ./include/linux/mm.h:844! [ 21.982059] invalid opcode: 0000 [#1] SMP KASAN [ 21.986713] Dumping ftrace buffer: [ 21.990220] (ftrace buffer empty) [ 21.993895] Modules linked in: [ 21.997056] CPU: 1 PID: 3142 Comm: syzkaller796331 Not tainted 4.15.0-rc4-mm1+ #49 [ 22.004732] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.014072] RIP: 0010:mon_bin_vma_fault+0x2f4/0x400 [ 22.019052] RSP: 0018:ffff8801c894f510 EFLAGS: 00010203 [ 22.024379] RAX: 0000000000000000 RBX: 1ffff10039129ea4 RCX: 0000000000000000 [ 22.031615] RDX: 0000000000000000 RSI: 1ffff10039129dee RDI: ffffed0039129e90 [ 22.039356] RBP: ffff8801c894f5e8 R08: 1ffff10039129db0 R09: 0000000000000000 [ 22.047550] R10: dffffc0000000000 R11: 0000000000000000 R12: 1ffff10039129ea8 [ 22.054787] R13: dffffc0000000000 R14: ffff8801c894f840 R15: ffffea0007356140 [ 22.062028] FS: 00007f452d378700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 22.070228] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.076253] CR2: 00000000208be000 CR3: 00000001cec93002 CR4: 00000000001606e0 [ 22.083496] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.090741] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.097979] Call Trace: [ 22.100543] ? mon_alloc_buff+0x1a0/0x1a0 [ 22.104659] ? find_held_lock+0x35/0x1d0 [ 22.108698] __do_fault+0xeb/0x30f [ 22.112203] ? vma_gap_callbacks_rotate+0x62/0x80 [ 22.117020] ? pte_offset_kernel+0xc7/0xc7 [ 22.121228] ? print_irqtrace_events+0x270/0x270 [ 22.125949] ? rb_insert_color_cached+0x1660/0x1660 [ 22.130932] ? vma_compute_subtree_gap+0x200/0x200 [ 22.135833] ? rb_insert_color_cached+0x1660/0x1660 [ 22.140822] ? check_noncircular+0x20/0x20 [ 22.145031] __handle_mm_fault+0x1d8f/0x3ce0 [ 22.149408] ? __pmd_alloc+0x4e0/0x4e0 [ 22.153265] ? find_held_lock+0x35/0x1d0 [ 22.157309] ? handle_mm_fault+0x2a0/0x930 [ 22.161510] ? lock_downgrade+0x980/0x980 [ 22.165634] handle_mm_fault+0x38f/0x930 [ 22.169666] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 22.174217] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.180070] ? find_vma+0x30/0x150 [ 22.183580] __get_user_pages+0x50c/0x15f0 [ 22.187787] ? follow_page_mask+0x17f0/0x17f0 [ 22.192251] ? vma_link+0xe9/0x170 [ 22.195761] ? lock_acquire+0x1d5/0x580 [ 22.199710] ? lock_acquire+0x1d5/0x580 [ 22.203654] ? __mm_populate+0x2c7/0x450 [ 22.207685] ? lock_release+0xa40/0xa40 [ 22.211625] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 22.217477] ? rcu_note_context_switch+0x710/0x710 [ 22.222375] populate_vma_page_range+0x20e/0x2f0 [ 22.227100] ? get_user_pages_unlocked+0x4f0/0x4f0 [ 22.231997] ? vmacache_find+0x5f/0x280 [ 22.235947] ? vmacache_update+0xfe/0x130 [ 22.240060] ? find_vma+0x30/0x150 [ 22.243567] __mm_populate+0x23a/0x450 [ 22.247421] ? populate_vma_page_range+0x2f0/0x2f0 [ 22.252316] ? down_read_killable+0x180/0x180 [ 22.256780] ? security_mmap_file+0x143/0x180 [ 22.261246] vm_mmap_pgoff+0x241/0x280 [ 22.265111] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.269920] ? putname+0xee/0x130 [ 22.273338] ? rcu_read_lock_sched_held+0x108/0x120 [ 22.278319] ? kmem_cache_free+0x267/0x2a0 [ 22.282526] SyS_mmap_pgoff+0x462/0x5f0 [ 22.286469] ? find_mergeable_anon_vma+0xd0/0xd0 [ 22.291199] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.296187] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.300917] SyS_mmap+0x16/0x20 [ 22.304174] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 22.309161] RIP: 0033:0x449249 [ 22.313280] RSP: 002b:00007f452d377d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 22.320953] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000449249 [ 22.328190] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.335428] RBP: 0000000000000000 R08: 000000000000000c R09: 0000000000000000 [ 22.342669] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dac20 [ 22.349910] R13: 6273752f7665642f R14: 00007f452d3789c0 R15: 0000000000000005 [ 22.357159] 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 db e1 96 fd 48 c7 c6 80 1f d1 85 4c 89 ff e8 6c a3 c0 fd <0f> 0b 48 89 95 28 ff ff ff 48 89 85 30 ff ff ff e8 b7 e1 96 fd [ 22.376229] RIP: mon_bin_vma_fault+0x2f4/0x400 RSP: ffff8801c894f510 [ 22.382742] ---[ end trace 01fedf8423a2bc1d ]--- [ 22.387497] Kernel panic - not syncing: Fatal exception [ 22.393625] Dumping ftrace buffer: [ 22.397149] (ftrace buffer empty) [ 22.400826] Kernel Offset: disabled [ 22.404422] Rebooting in 86400 seconds..