[....] Starting enhanced syslogd: rsyslogd[ 11.973505] audit: type=1400 audit(1512669469.048:5): avc: denied { syslog } for pid=2999 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: [ 35.984852] audit: type=1400 audit(1512669493.059:6): avc: denied { map } for pid=3143 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-kasan-gce-2,10.128.0.35' (ECDSA) to the list of known hosts. executing program [ 51.639750] audit: type=1400 audit(1512669508.714:7): avc: denied { map } for pid=3155 comm="syzkaller242197" path="/root/syzkaller242197820" 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 [ 51.646247] kasan: CONFIG_KASAN_INLINE enabled [ 51.646257] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 51.646264] general protection fault: 0000 [#1] SMP KASAN [ 51.646268] Dumping ftrace buffer: [ 51.646272] (ftrace buffer empty) [ 51.646273] Modules linked in: [ 51.646280] CPU: 0 PID: 3155 Comm: syzkaller242197 Not tainted 4.15.0-rc2+ #212 [ 51.646282] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.646294] RIP: 0010:string+0xb4/0x200 [ 51.646296] RSP: 0018:ffff8801c52cf780 EFLAGS: 00010006 [ 51.646300] RAX: dffffc0000000000 RBX: fffffffffffffffe RCX: ffffffff8513b85f [ 51.646303] RDX: 000dccad8dce4e8e RSI: 1ffff10038a59e01 RDI: ffff8801c52cf7a0 [ 51.646305] RBP: ffff8801c52cf7d0 R08: ffffed00389d2476 R09: ffffed00389d2476 [ 51.646307] R10: 0000000000000002 R11: ffffed00389d2475 R12: 006e656c6e727474 [ 51.646309] R13: 006e656c6e727473 R14: ffffffffffffffff R15: ffff8801c4e923aa [ 51.646313] FS: 0000000002488880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 51.646315] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.646317] CR2: 00000000205e2ff0 CR3: 00000001c67c2000 CR4: 00000000001406f0 [ 51.646322] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.646324] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.646326] Call Trace: [ 51.646332] ? format_decode+0x10a/0x830 [ 51.646339] vsnprintf+0x863/0x1900 [ 51.646346] ? pointer+0x9e0/0x9e0 [ 51.646354] ? lock_release+0xda0/0xda0 [ 51.646364] seq_vprintf+0xe3/0x1a0 [ 51.646370] seq_printf+0xb3/0xe0 [ 51.646374] ? seq_vprintf+0x1a0/0x1a0 [ 51.646380] ? __lock_task_sighand+0x22f/0x6e0 [ 51.646386] ? zap_other_threads+0x240/0x240 [ 51.646391] ? kasan_kmalloc+0xad/0xe0 [ 51.646401] show_timer+0x1ee/0x2b0 [ 51.646404] ? timers_start+0x14c/0x1c0 [ 51.646409] traverse+0x248/0xa00 [ 51.646417] ? seq_hlist_next+0xc0/0xc0 [ 51.646425] seq_read+0x96a/0x13d0 [ 51.646436] ? seq_lseek+0x3c0/0x3c0 [ 51.646442] ? selinux_file_permission+0x82/0x460 [ 51.646450] ? security_file_permission+0x89/0x1f0 [ 51.646459] ? rw_verify_area+0xe5/0x2b0 [ 51.646465] do_iter_read+0x3db/0x5b0 [ 51.646472] ? dup_iter+0x260/0x260 [ 51.646480] vfs_readv+0x121/0x1c0 [ 51.646485] ? may_open_dev+0xe0/0xe0 [ 51.646491] ? compat_rw_copy_check_uvector+0x2e0/0x2e0 [ 51.646500] ? mm_fault_error+0x2c0/0x2c0 [ 51.646509] ? fget_raw+0x20/0x20 [ 51.646513] ? do_page_fault+0xee/0x720 [ 51.646519] ? putname+0xf3/0x130 [ 51.646525] ? do_sys_open+0x320/0x6d0 [ 51.646532] do_preadv+0x11b/0x1a0 [ 51.646535] ? do_preadv+0x11b/0x1a0 [ 51.646541] SyS_preadv+0x30/0x40 [ 51.646549] entry_SYSCALL_64_fastpath+0x1f/0x96 [ 51.646552] RIP: 0033:0x440159 [ 51.646554] RSP: 002b:00007ffe686f3458 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 51.646558] RAX: ffffffffffffffda RBX: 00007ffe686f3460 RCX: 0000000000440159 [ 51.646560] RDX: 0000000000000001 RSI: 00000000205e2ff0 RDI: 0000000000000003 [ 51.646562] RBP: 0000000000000000 R08: 0000000000000011 R09: 65732f636f72702f [ 51.646564] R10: 0001000000000000 R11: 0000000000000213 R12: 0000000000401a20 [ 51.646566] R13: 0000000000401ab0 R14: 0000000000000000 R15: 0000000000000000 [ 51.646575] Code: 01 00 00 e8 bf 7f 5c fc 4d 85 f6 0f 84 10 01 00 00 e8 b1 7f 5c 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 [ 51.646645] RIP: string+0xb4/0x200 RSP: ffff8801c52cf780 [ 51.646652] ---[ end trace e53b40b695adcf2b ]--- [ 51.646655] Kernel panic - not syncing: Fatal exception [ 51.665621] Dumping ftrace buffer: [ 51.665623] (ftrace buffer empty) [ 51.665625] Kernel Offset: disabled [ 52.014949] Rebooting in 86400 seconds..