[....] Starting enhanced syslogd: rsyslogd[ 13.178548] audit: type=1400 audit(1518555399.535:4): avc: denied { syslog } for pid=3647 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts. 2018/02/13 20:56:51 parsed 1 programs 2018/02/13 20:56:51 executed programs: 0 syzkaller login: [ 25.383498] audit: type=1400 audit(1518555411.735:5): avc: denied { sys_admin } for pid=3808 comm="syz-executor0" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 25.418370] IPVS: Creating netns size=2536 id=1 [ 25.439949] IPVS: Creating netns size=2536 id=2 [ 25.450575] IPVS: Creating netns size=2536 id=3 [ 25.455059] audit: type=1400 audit(1518555411.815:6): avc: denied { sys_chroot } for pid=3811 comm="syz-executor2" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 25.455885] audit: type=1400 audit(1518555411.815:7): avc: denied { net_admin } for pid=3811 comm="syz-executor2" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 25.485715] audit: type=1400 audit(1518555411.845:8): avc: denied { dac_override } for pid=3834 comm="syz-executor2" capability=1 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 25.547088] IPVS: Creating netns size=2536 id=4 [ 25.567824] IPVS: Creating netns size=2536 id=5 [ 25.600952] IPVS: Creating netns size=2536 id=6 [ 25.613800] IPVS: Creating netns size=2536 id=7 [ 25.638064] IPVS: Creating netns size=2536 id=8 2018/02/13 20:56:56 executed programs: 524 [ 35.020296] ================================================================== [ 35.027707] BUG: KASAN: stack-out-of-bounds in unwind_get_return_address+0x92/0xa0 [ 35.035398] Read of size 8 at addr ffff8801d922fde8 by task syz-executor3/11128 [ 35.042819] [ 35.044436] CPU: 1 PID: 11128 Comm: syz-executor3 Not tainted 4.9.81-gf8bbe51 #40 [ 35.052040] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.061374] ffff8801b040f7c8 ffffffff81d94e69 ffffea0007648bc0 ffff8801d922fde8 [ 35.069403] 0000000000000000 ffff8801d922fde8 0000000000000000 ffff8801b040f800 [ 35.077540] ffffffff8153e1e3 ffff8801d922fde8 0000000000000008 0000000000000000 [ 35.085597] Call Trace: [ 35.088181] [] dump_stack+0xc1/0x128 [ 35.093542] [] print_address_description+0x73/0x280 [ 35.100206] [] kasan_report+0x275/0x360 [ 35.105824] [] ? unwind_get_return_address+0x92/0xa0 [ 35.112568] [] __asan_report_load8_noabort+0x14/0x20 [ 35.119314] [] unwind_get_return_address+0x92/0xa0 [ 35.125882] [] __save_stack_trace+0x8d/0xf0 [ 35.131837] [] save_stack_trace_tsk+0x48/0x70 [ 35.137958] [] proc_pid_stack+0x146/0x230 [ 35.143744] [] ? lock_trace+0xc0/0xc0 [ 35.149201] [] proc_single_show+0xf8/0x170 [ 35.155087] [] seq_read+0x32f/0x1290 [ 35.160444] [] ? seq_escape+0x200/0x200 [ 35.166058] [] ? fsnotify+0x86/0xf30 [ 35.171407] [] ? fsnotify+0xf30/0xf30 [ 35.176834] [] ? avc_policy_seqno+0x9/0x20 [ 35.182712] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 35.189718] [] ? security_file_permission+0x89/0x1e0 [ 35.196471] [] ? seq_escape+0x200/0x200 [ 35.202101] [] ? seq_escape+0x200/0x200 [ 35.207724] [] compat_do_readv_writev+0x522/0x760 [ 35.214206] [] ? do_pwritev+0x1a0/0x1a0 [ 35.219808] [] ? mutex_lock_nested+0x5e3/0x870 [ 35.226018] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 35.232832] [] ? mutex_lock_nested+0x56f/0x870 [ 35.239052] [] ? __fdget_pos+0x9f/0xc0 [ 35.244578] [] ? __fget+0x20a/0x3b0 [ 35.249845] [] ? mutex_lock_killable_nested+0x960/0x960 [ 35.256839] [] ? __fget+0x47/0x3b0 [ 35.262013] [] compat_readv+0xe3/0x150 [ 35.267526] [] do_compat_readv+0xf4/0x1d0 [ 35.273312] [] ? compat_readv+0x150/0x150 [ 35.279100] [] compat_SyS_readv+0x26/0x30 [ 35.284882] [] ? SyS_pwritev2+0x80/0x80 [ 35.290483] [] do_fast_syscall_32+0x2f7/0x870 [ 35.296613] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.303252] [] entry_SYSENTER_compat+0x74/0x83 [ 35.309448] [ 35.311043] The buggy address belongs to the page: [ 35.315941] page:ffffea0007648bc0 count:0 mapcount:0 mapping: (null) index:0x0 [ 35.324163] flags: 0x8000000000000000() [ 35.328103] page dumped because: kasan: bad access detected [ 35.333780] [ 35.335379] Memory state around the buggy address: [ 35.340283] ffff8801d922fc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.347619] ffff8801d922fd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.354963] >ffff8801d922fd80: f1 f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 [ 35.362299] ^ [ 35.369023] ffff8801d922fe00: f2 f2 f2 f2 00 00 f2 f2 00 00 00 00 00 00 00 00 [ 35.376350] ffff8801d922fe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.383674] ================================================================== [ 35.391006] Disabling lock debugging due to kernel taint [ 35.397583] Kernel panic - not syncing: panic_on_warn set ... [ 35.397583] [ 35.404939] CPU: 1 PID: 11128 Comm: syz-executor3 Tainted: G B 4.9.81-gf8bbe51 #40 [ 35.413829] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.423152] ffff8801b040f720 ffffffff81d94e69 ffffffff84197637 ffff8801b040f7f8 [ 35.431136] 0000000000000000 ffff8801d922fde8 0000000000000000 ffff8801b040f7e8 [ 35.439100] ffffffff8142f691 0000000041b58ab3 ffffffff8418b0a8 ffffffff8142f4d5 [ 35.447073] Call Trace: [ 35.449632] [] dump_stack+0xc1/0x128 [ 35.454965] [] panic+0x1bc/0x3a8 [ 35.459951] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 35.468148] [] ? preempt_schedule+0x25/0x30 [ 35.474090] [] ? ___preempt_schedule+0x16/0x18 [ 35.480293] [] kasan_end_report+0x50/0x50 [ 35.486059] [] kasan_report+0x167/0x360 [ 35.491653] [] ? unwind_get_return_address+0x92/0xa0 [ 35.498373] [] __asan_report_load8_noabort+0x14/0x20 [ 35.505101] [] unwind_get_return_address+0x92/0xa0 [ 35.511647] [] __save_stack_trace+0x8d/0xf0 [ 35.517587] [] save_stack_trace_tsk+0x48/0x70 [ 35.523699] [] proc_pid_stack+0x146/0x230 [ 35.529471] [] ? lock_trace+0xc0/0xc0 [ 35.534891] [] proc_single_show+0xf8/0x170 [ 35.540745] [] seq_read+0x32f/0x1290 [ 35.546078] [] ? seq_escape+0x200/0x200 [ 35.551668] [] ? fsnotify+0x86/0xf30 [ 35.556998] [] ? fsnotify+0xf30/0xf30 [ 35.562418] [] ? avc_policy_seqno+0x9/0x20 [ 35.568270] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 35.575251] [] ? security_file_permission+0x89/0x1e0 [ 35.581972] [] ? seq_escape+0x200/0x200 [ 35.587562] [] ? seq_escape+0x200/0x200 [ 35.593155] [] compat_do_readv_writev+0x522/0x760 [ 35.599614] [] ? do_pwritev+0x1a0/0x1a0 [ 35.605207] [] ? mutex_lock_nested+0x5e3/0x870 [ 35.611408] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 35.618215] [] ? mutex_lock_nested+0x56f/0x870 [ 35.624425] [] ? __fdget_pos+0x9f/0xc0 [ 35.629930] [] ? __fget+0x20a/0x3b0 [ 35.635174] [] ? mutex_lock_killable_nested+0x960/0x960 [ 35.642152] [] ? __fget+0x47/0x3b0 [ 35.647309] [] compat_readv+0xe3/0x150 [ 35.652818] [] do_compat_readv+0xf4/0x1d0 [ 35.658582] [] ? compat_readv+0x150/0x150 [ 35.664346] [] compat_SyS_readv+0x26/0x30 [ 35.670110] [] ? SyS_pwritev2+0x80/0x80 [ 35.675703] [] do_fast_syscall_32+0x2f7/0x870 [ 35.681813] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.688445] [] entry_SYSENTER_compat+0x74/0x83 [ 35.695094] Dumping ftrace buffer: [ 35.698612] (ftrace buffer empty) [ 35.702293] Kernel Offset: disabled [ 35.705889] Rebooting in 86400 seconds..