[....] Starting enhanced syslogd: rsyslogd[ 12.978660] audit: type=1400 audit(1513880247.695:4): avc: denied { syslog } for pid=3176 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 Warning: Permanently added 'ci-android-49-kasan-gce-7,10.128.15.213' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program syzkaller login: [ 24.838069] ================================================================== [ 24.847089] BUG: KASAN: wild-memory-access in sg_read+0x1296/0x1440 [ 24.853458] Read of size 129 at addr ffe7087456283000 by task syzkaller396392/3372 [ 24.861125] [ 24.862720] CPU: 0 PID: 3372 Comm: syzkaller396392 Not tainted 4.9.71-g2506378 #113 [ 24.870474] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.879793] ffff8801c80ffa38 ffffffff81d922b9 ffe7087456283000 0000000000000081 [ 24.887733] 0000000000000000 ffff8801c954c180 ffff8801c9714340 ffff8801c80ffa80 [ 24.895679] ffffffff8153bebe ffffffff82667866 0000000000000282 5fcdbf6024a5f4d3 [ 24.903627] Call Trace: [ 24.906178] [] dump_stack+0xc1/0x128 [ 24.911505] [] kasan_report+0x15e/0x360 [ 24.917090] [] ? sg_read+0x1296/0x1440 [ 24.922591] [] check_memory_region+0x137/0x190 [ 24.928784] [] kasan_check_read+0x11/0x20 [ 24.934541] [] sg_read+0x1296/0x1440 [ 24.939867] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.946496] [] ? fsnotify+0xf30/0xf30 [ 24.951909] [] ? avc_policy_seqno+0x9/0x20 [ 24.957757] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 24.964734] [] ? security_file_permission+0x89/0x1e0 [ 24.971448] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.978077] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 24.984706] [] do_readv_writev+0x520/0x750 [ 24.990561] [] ? vfs_write+0x530/0x530 [ 24.996067] [] ? __fget+0x201/0x3a0 [ 25.001307] [] ? __fget+0x228/0x3a0 [ 25.006543] [] ? __fget+0x47/0x3a0 [ 25.011694] [] vfs_readv+0x84/0xc0 [ 25.016845] [] do_readv+0xe6/0x250 [ 25.021997] [] ? vfs_readv+0xc0/0xc0 [ 25.027322] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 executing program [ 25.033952] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 25.040757] [] SyS_readv+0x27/0x30 [ 25.045910] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 25.052450] ================================================================== [ 25.059770] Disabling lock debugging due to kernel taint [ 25.066222] Kernel panic - not syncing: panic_on_warn set ... [ 25.066222] [ 25.073583] CPU: 1 PID: 3372 Comm: syzkaller396392 Tainted: G B 4.9.71-g2506378 #113 [ 25.082553] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.091875] ffff8801c80ff958 ffffffff81d922b9 ffffffff84194b3f ffff8801c80ffa30 [ 25.099819] 0000000000000000 ffff8801c954c180 ffff8801c9714340 ffff8801c80ffa20 [ 25.107769] ffffffff8142d741 0000000041b58ab3 ffffffff84188580 ffffffff8142d585 [ 25.115707] Call Trace: [ 25.118263] [] dump_stack+0xc1/0x128 [ 25.123589] [] panic+0x1bc/0x3a8 [ 25.128569] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 25.136764] [] ? preempt_schedule+0x25/0x30 [ 25.142700] [] ? ___preempt_schedule+0x16/0x18 [ 25.148895] [] kasan_end_report+0x50/0x50 [ 25.154655] [] kasan_report+0x167/0x360 [ 25.160242] [] ? sg_read+0x1296/0x1440 [ 25.165740] [] check_memory_region+0x137/0x190 [ 25.171933] [] kasan_check_read+0x11/0x20 [ 25.177693] [] sg_read+0x1296/0x1440 [ 25.183019] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.189649] [] ? fsnotify+0xf30/0xf30 [ 25.195065] [] ? avc_policy_seqno+0x9/0x20 [ 25.200913] [] do_loop_readv_writev.part.17+0x141/0x1e0 [ 25.207886] [] ? security_file_permission+0x89/0x1e0 [ 25.214604] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.221232] [] ? sg_proc_seq_show_debug+0xd10/0xd10 [ 25.227861] [] do_readv_writev+0x520/0x750 [ 25.233707] [] ? vfs_write+0x530/0x530 [ 25.239213] [] ? __fget+0x201/0x3a0 [ 25.244450] [] ? __fget+0x228/0x3a0 [ 25.249689] [] ? __fget+0x47/0x3a0 [ 25.254840] [] vfs_readv+0x84/0xc0 [ 25.259991] [] do_readv+0xe6/0x250 [ 25.265143] [] ? vfs_readv+0xc0/0xc0 [ 25.270469] [] ? entry_SYSCALL_64_fastpath+0x5/0xc6 [ 25.277101] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 25.283902] [] SyS_readv+0x27/0x30 [ 25.289056] [] entry_SYSCALL_64_fastpath+0x23/0xc6 [ 25.295632] Dumping ftrace buffer: [ 25.299136] (ftrace buffer empty) [ 25.302809] Kernel Offset: disabled [ 25.306398] Rebooting in 86400 seconds..