[....] Starting enhanced syslogd: rsyslogd[ 12.830371] audit: type=1400 audit(1512829596.352:5): avc: denied { syslog } for pid=2990 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: [ 27.205582] audit: type=1400 audit(1512829610.727:6): avc: denied { map } for pid=3134 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-5,10.128.0.17' (ECDSA) to the list of known hosts. executing program [ 33.261604] audit: type=1400 audit(1512829616.783:7): avc: denied { map } for pid=3147 comm="syzkaller927067" path="/root/syzkaller927067717" 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 [ 33.266793] kasan: CONFIG_KASAN_INLINE enabled [ 33.266803] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.266809] general protection fault: 0000 [#1] SMP KASAN [ 33.266813] Dumping ftrace buffer: [ 33.266817] (ftrace buffer empty) [ 33.266819] Modules linked in: [ 33.266826] CPU: 1 PID: 3147 Comm: syzkaller927067 Not tainted 4.15.0-rc2-next-20171208+ #63 [ 33.266829] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.266839] RIP: 0010:string+0xb4/0x200 [ 33.266841] RSP: 0018:ffff8801c562f780 EFLAGS: 00010006 [ 33.266845] RAX: dffffc0000000000 RBX: fffffffffffffffe RCX: ffffffff8515ca3f [ 33.266847] RDX: 000dccad8dce4e8e RSI: 1ffff10038ac5e01 RDI: ffff8801c562f7a0 [ 33.266850] RBP: ffff8801c562f7d0 R08: ffffed0038afcc6e R09: ffffed0038afcc6e [ 33.266852] R10: 0000000000000002 R11: ffffed0038afcc6d R12: 006e656c6e727474 [ 33.266854] R13: 006e656c6e727473 R14: ffffffffffffffff R15: ffff8801c57e636a [ 33.266858] FS: 000000000073a880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 33.266860] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.266862] CR2: 00000000205e2ff0 CR3: 00000001c568f000 CR4: 00000000001406e0 [ 33.266867] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.266869] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.266870] Call Trace: [ 33.266876] ? format_decode+0x10a/0x830 [ 33.266883] vsnprintf+0x863/0x1900 [ 33.266891] ? pointer+0x9e0/0x9e0 [ 33.266903] ? lock_release+0xda0/0xda0 [ 33.266914] seq_vprintf+0xe3/0x1a0 [ 33.266920] seq_printf+0xb3/0xe0 [ 33.266924] ? seq_vprintf+0x1a0/0x1a0 [ 33.266930] ? __lock_task_sighand+0x22f/0x6e0 [ 33.266936] ? zap_other_threads+0x240/0x240 [ 33.266942] ? kasan_kmalloc+0xad/0xe0 [ 33.266952] show_timer+0x1ee/0x2b0 [ 33.266956] ? timers_start+0x14c/0x1c0 [ 33.266961] traverse+0x248/0xa00 [ 33.266969] ? seq_hlist_next+0xc0/0xc0 [ 33.266978] seq_read+0x96a/0x13d0 [ 33.266989] ? seq_lseek+0x3c0/0x3c0 [ 33.266996] ? selinux_file_permission+0x82/0x460 [ 33.267007] ? security_file_permission+0x89/0x1f0 [ 33.267013] ? rw_verify_area+0xe5/0x2b0 [ 33.267018] do_iter_read+0x3db/0x5b0 [ 33.267025] ? dup_iter+0x260/0x260 [ 33.267034] vfs_readv+0x121/0x1c0 [ 33.267040] ? may_open_dev+0xe0/0xe0 [ 33.267045] ? compat_rw_copy_check_uvector+0x2e0/0x2e0 [ 33.267054] ? mm_fault_error+0x2c0/0x2c0 [ 33.267062] ? fget_raw+0x20/0x20 [ 33.267067] ? do_page_fault+0xee/0x720 [ 33.267073] ? putname+0xf3/0x130 [ 33.267081] ? do_sys_open+0x320/0x6d0 [ 33.267088] do_preadv+0x11b/0x1a0 [ 33.267091] ? do_preadv+0x11b/0x1a0 [ 33.267098] SyS_preadv+0x30/0x40 [ 33.267106] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 33.267109] RIP: 0033:0x440159 [ 33.267111] RSP: 002b:00007fff8090d948 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 33.267115] RAX: ffffffffffffffda RBX: 00007fff8090d950 RCX: 0000000000440159 [ 33.267117] RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000003 [ 33.267119] RBP: 0000000000000000 R08: 0000000000000011 R09: 65732f636f72702f [ 33.267121] R10: 0001000000000000 R11: 0000000000000213 R12: 0000000000401a20 [ 33.267123] R13: 0000000000401ab0 R14: 0000000000000000 R15: 0000000000000000 [ 33.267132] Code: 01 00 00 e8 9f 70 5a fc 4d 85 f6 0f 84 10 01 00 00 e8 91 70 5a fc 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 4d 8d 65 01 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 ec 00 00 [ 33.267200] RIP: string+0xb4/0x200 RSP: ffff8801c562f780 [ 33.267207] ---[ end trace df065d9c9a341716 ]--- [ 33.267209] Kernel panic - not syncing: Fatal exception [ 33.287848] Dumping ftrace buffer: [ 33.287851] (ftrace buffer empty) [ 33.287853] Kernel Offset: disabled [ 33.637839] Rebooting in 86400 seconds..