[....] Starting enhanced syslogd: rsyslogd[ 12.629387] audit: type=1400 audit(1512670221.072:5): avc: denied { syslog } for pid=2995 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 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: [ 28.620929] audit: type=1400 audit(1512670237.063:6): 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 'ci-upstream-kasan-gce-386-2,10.128.15.211' (ECDSA) to the list of known hosts. executing program [ 34.632923] audit: type=1400 audit(1512670243.075:7): avc: denied { map } for pid=3152 comm="syzkaller541390" path="/root/syzkaller541390333" 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 [ 34.638374] kasan: CONFIG_KASAN_INLINE enabled [ 34.638383] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 34.638389] general protection fault: 0000 [#1] SMP KASAN [ 34.638392] Dumping ftrace buffer: [ 34.638395] (ftrace buffer empty) [ 34.638397] Modules linked in: [ 34.638403] CPU: 0 PID: 3152 Comm: syzkaller541390 Not tainted 4.15.0-rc2+ #122 [ 34.638405] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.638415] RIP: 0010:string+0xb4/0x200 [ 34.638418] RSP: 0018:ffff8801c4b475e0 EFLAGS: 00010006 [ 34.638421] RAX: dffffc0000000000 RBX: fffffffffffffffe RCX: ffffffff8513b85f [ 34.638424] RDX: 000dccad8dce4e8e RSI: 1ffff10038968e01 RDI: ffff8801c4b47600 [ 34.638426] RBP: ffff8801c4b47630 R08: ffffed0038709c36 R09: ffffed0038709c36 [ 34.638428] R10: 0000000000000002 R11: ffffed0038709c35 R12: 006e656c6e727474 [ 34.638431] R13: 006e656c6e727473 R14: ffffffffffffffff R15: ffff8801c384e1aa [ 34.638434] FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:0000000009e61840 [ 34.638436] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 34.638438] CR2: 00000000205e2ff0 CR3: 00000001c43ca000 CR4: 00000000001406f0 [ 34.638443] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.638445] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.638446] Call Trace: [ 34.638452] ? format_decode+0x10a/0x830 [ 34.638459] vsnprintf+0x863/0x1900 [ 34.638466] ? pointer+0x9e0/0x9e0 [ 34.638472] ? lock_release+0xda0/0xda0 [ 34.638481] seq_vprintf+0xe3/0x1a0 [ 34.638487] seq_printf+0xb3/0xe0 [ 34.638491] ? seq_vprintf+0x1a0/0x1a0 [ 34.638496] ? __lock_task_sighand+0x22f/0x6e0 [ 34.638502] ? zap_other_threads+0x240/0x240 [ 34.638506] ? kasan_kmalloc+0xad/0xe0 [ 34.638515] show_timer+0x1ee/0x2b0 [ 34.638518] ? timers_start+0x14c/0x1c0 [ 34.638523] traverse+0x248/0xa00 [ 34.638531] ? seq_hlist_next+0xc0/0xc0 [ 34.638539] seq_read+0x96a/0x13d0 [ 34.638550] ? seq_lseek+0x3c0/0x3c0 [ 34.638556] ? selinux_file_permission+0x82/0x460 [ 34.638562] ? security_file_permission+0x89/0x1f0 [ 34.638570] ? rw_verify_area+0xe5/0x2b0 [ 34.638576] do_iter_read+0x3db/0x5b0 [ 34.638583] ? iov_iter_get_pages+0x1150/0x1150 [ 34.638592] compat_readv+0x1bf/0x270 [ 34.638598] ? vfs_iter_read+0xb0/0xb0 [ 34.638609] ? fget_raw+0x20/0x20 [ 34.638615] ? down_read_trylock+0xdb/0x170 [ 34.638621] ? __do_page_fault+0x32d/0xc90 [ 34.638630] ? __handle_mm_fault+0x3e20/0x3e20 [ 34.638635] ? vmacache_find+0x5f/0x280 [ 34.638644] do_compat_preadv64+0xdc/0x100 [ 34.638648] ? do_compat_preadv64+0xdc/0x100 [ 34.638654] compat_SyS_preadv+0x3b/0x50 [ 34.638658] ? compat_SyS_preadv64+0x40/0x40 [ 34.638666] do_fast_syscall_32+0x3ee/0xf9d [ 34.638673] ? do_int80_syscall_32+0x9d0/0x9d0 [ 34.638677] ? kasan_check_read+0x11/0x20 [ 34.638682] ? syscall_return_slowpath+0x550/0x550 [ 34.638687] ? SyS_rt_sigaction+0x94/0x1b0 [ 34.638692] ? lockdep_sys_exit+0x47/0xf0 [ 34.638697] ? retint_user+0x18/0x18 [ 34.638703] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.638711] entry_SYSENTER_compat+0x51/0x60 [ 34.638714] RIP: 0023:0xf7f82c79 [ 34.638716] RSP: 002b:00000000ffc4ad4c EFLAGS: 00000296 ORIG_RAX: 000000000000014d [ 34.638719] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000205e2ff0 [ 34.638721] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000010000 [ 34.638723] RBP: 0000000020adafa0 R08: 0000000000000000 R09: 0000000000000000 [ 34.638725] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 34.638727] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 34.638736] 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 [ 34.638803] RIP: string+0xb4/0x200 RSP: ffff8801c4b475e0 [ 34.638808] ---[ end trace d8fe707f5fc174f1 ]--- [ 34.638811] Kernel panic - not syncing: Fatal exception [ 34.658813] Dumping ftrace buffer: [ 34.658814] (ftrace buffer empty) [ 34.658816] Kernel Offset: disabled [ 35.045776] Rebooting in 86400 seconds..