[....] Starting enhanced syslogd: rsyslogd[ 11.084832] audit: type=1400 audit(1514978804.600:5): avc: denied { syslog } for pid=3312 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 15.673880] audit: type=1400 audit(1514978809.189:6): avc: denied { map } for pid=3451 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 '10.128.0.12' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 21.891415] audit: type=1400 audit(1514978815.407:7): avc: denied { map } for pid=3465 comm="syzkaller304615" path="/root/syzkaller304615721" 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 [ 21.999142] audit: type=1400 audit(1514978815.514:8): avc: denied { map } for pid=3465 comm="syzkaller304615" path="/dev/usbmon0" dev="devtmpfs" ino=8878 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 [ 22.031192] page:ffffea000701b900 count:0 mapcount:0 mapping: (null) index:0x0 [ 22.039496] flags: 0x2fffc0000000000() [ 22.043412] raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff [ 22.051302] raw: ffffea0007025ae0 ffffea000708ba60 0000000000000000 0000000000000000 [ 22.059184] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) <= 0) [ 22.066291] ------------[ cut here ]------------ [ 22.071018] kernel BUG at ./include/linux/mm.h:844! [ 22.076051] invalid opcode: 0000 [#1] SMP KASAN [ 22.080693] Dumping ftrace buffer: [ 22.084197] (ftrace buffer empty) [ 22.087871] Modules linked in: [ 22.091030] CPU: 0 PID: 3487 Comm: syzkaller304615 Not tainted 4.15.0-rc6-mm1+ #50 [ 22.098697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.108028] RIP: 0010:mon_bin_vma_fault+0x1df/0x250 [ 22.113009] RSP: 0018:ffff8801c0ebf968 EFLAGS: 00010293 [ 22.118339] RAX: ffff8801c0cc85c0 RBX: ffffea000701b900 RCX: ffffffff817eddec [ 22.125573] RDX: 0000000000000000 RSI: ffff8801db41c6d8 RDI: ffffea000701b938 [ 22.132812] RBP: ffff8801c0ebf988 R08: 0000000000000000 R09: 0000000000000000 [ 22.140046] R10: ffff8801c0ebfaa0 R11: 0000000000000000 R12: ffff8801c0ebfa50 [ 22.147282] R13: ffffea000701b900 R14: ffffea0007025ae0 R15: 1ffff100381d7f3e [ 22.154516] FS: 00007fd462017700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 22.162703] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.168550] CR2: 000000002018c000 CR3: 00000001c1728006 CR4: 00000000001606f0 [ 22.175791] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.183027] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.190262] Call Trace: [ 22.192826] __do_fault+0x8a/0x1d0 [ 22.196338] __handle_mm_fault+0x1c96/0x3210 [ 22.200712] ? __pmd_alloc+0x4e0/0x4e0 [ 22.204575] ? find_held_lock+0x35/0x1e0 [ 22.208610] handle_mm_fault+0x305/0x840 [ 22.212636] __get_user_pages+0x37e/0x1140 [ 22.216847] ? follow_page_mask+0x1430/0x1430 [ 22.221311] ? memset+0x31/0x40 [ 22.224558] populate_vma_page_range+0x18e/0x230 [ 22.229279] __mm_populate+0x204/0x350 [ 22.233133] ? populate_vma_page_range+0x230/0x230 [ 22.238033] vm_mmap_pgoff+0x1e1/0x1f0 [ 22.241892] ? vma_is_stack_for_current+0xa0/0xa0 [ 22.246702] ? __fget+0x22b/0x390 [ 22.250124] SyS_mmap_pgoff+0x423/0x580 [ 22.254064] ? find_mergeable_anon_vma+0x2a0/0x2a0 [ 22.258958] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 22.263940] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 22.268664] SyS_mmap+0x16/0x20 [ 22.271912] entry_SYSCALL_64_fastpath+0x23/0x9a [ 22.276638] RIP: 0033:0x44a0b9 [ 22.279793] RSP: 002b:00007fd462016d98 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 [ 22.287549] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 000000000044a0b9 [ 22.294783] RDX: 0000000001000004 RSI: 0000000000004000 RDI: 0000000020ac6000 [ 22.302019] RBP: 0000000000000000 R08: 0000000000000008 R09: 0000000000000000 [ 22.309255] R10: 0000000000008011 R11: 0000000000000212 R12: 00000000006dbc20 [ 22.316489] R13: 6b66722f7665642f R14: 6273752f7665642f R15: 0000000000000005 [ 22.323730] Code: 5d c3 bb 02 00 00 00 e8 40 c1 e2 fd 89 d8 5b 41 5c 41 5d 41 5e 5d c3 e8 30 c1 e2 fd 48 c7 c6 c0 08 73 85 48 89 df e8 01 94 03 fe <0f> 0b e8 1a c1 e2 fd 49 8d 5e ff e9 51 ff ff ff e8 4c a8 0e fe [ 22.342826] RIP: mon_bin_vma_fault+0x1df/0x250 RSP: ffff8801c0ebf968 [ 22.349346] ---[ end trace 6cf88e34b66a74e6 ]--- [ 22.354108] Kernel panic - not syncing: Fatal exception [ 22.359954] Dumping ftrace buffer: [ 22.363472] (ftrace buffer empty) [ 22.367149] Kernel Offset: disabled [ 22.370741] Rebooting in 86400 seconds..