[....] Starting enhanced syslogd: rsyslogd[ 13.032116] audit: type=1400 audit(1517648836.637:4): avc: denied { syslog } for pid=3779 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 '10.128.0.49' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.736019] BUG: using __this_cpu_read() in preemptible [00000000] code: syzkaller971839/3953 [ 47.744899] caller is __this_cpu_preempt_check+0x1c/0x20 [ 47.750324] CPU: 1 PID: 3953 Comm: syzkaller971839 Not tainted 4.9.79-g47af77b #26 [ 47.758005] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.767330] ffff8801d4bd76d8 ffffffff81d94b09 0000000000000001 ffffffff83c18800 [ 47.775303] ffffffff83f454c0 ffff8801d6a93000 0000000000000003 ffff8801d4bd7718 [ 47.783279] ffffffff81dfc0e4 ffff8801d4bd7730 ffffffff83f454c0 dffffc0000000000 [ 47.791242] Call Trace: [ 47.793811] [] dump_stack+0xc1/0x128 [ 47.799502] [] check_preemption_disabled+0x1d4/0x200 [ 47.806224] [] __this_cpu_preempt_check+0x1c/0x20 [ 47.812685] [] ipcomp_init_state+0x188/0x930 [ 47.818715] [] ? __lock_is_held+0xa1/0xf0 [ 47.824483] [] ipcomp4_init_state+0xb0/0x7d0 [ 47.830509] [] __xfrm_init_state+0x3e7/0xb30 [ 47.836539] [] xfrm_init_state+0x1a/0x20 [ 47.842243] [] pfkey_add+0x1fb9/0x3470 [ 47.847750] [] ? pfkey_delete+0x360/0x360 [ 47.853517] [] ? pfkey_seq_stop+0x80/0x80 [ 47.859285] [] ? __skb_clone+0x24a/0x7d0 [ 47.864965] [] ? pfkey_delete+0x360/0x360 [ 47.870751] [] pfkey_process+0x68b/0x750 [ 47.876433] [] ? pfkey_send_new_mapping+0x11b0/0x11b0 [ 47.883243] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 47.890053] [] pfkey_sendmsg+0x3a9/0x760 [ 47.895733] [] ? pfkey_spdget+0x820/0x820 [ 47.901500] [] sock_sendmsg+0xca/0x110 [ 47.907011] [] ___sys_sendmsg+0x6d1/0x7e0 [ 47.912778] [] ? copy_msghdr_from_user+0x550/0x550 [ 47.919327] [] ? __lru_cache_add+0x187/0x250 [ 47.925358] [] ? check_preemption_disabled+0x3b/0x200 [ 47.932165] [] ? __fget+0x201/0x3a0 [ 47.937414] [] ? __fget+0x228/0x3a0 [ 47.942657] [] ? __fget+0x47/0x3a0 [ 47.947817] [] ? __fget_light+0x188/0x1e0 [ 47.953581] [] ? __fdget+0x18/0x20 [ 47.958742] [] __sys_sendmsg+0xd6/0x190 [ 47.964333] [] ? SyS_shutdown+0x1b0/0x1b0 [ 47.970101] [] ? __do_page_fault+0x5ec/0xd40 [ 47.976130] [] ? __do_page_fault+0x3bd/0xd40 [ 47.982295] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 47.989104] [] SyS_sendmsg+0x2d/0x50 [ 47.994438] [] entry_SYSCALL_64_fastpath+0x29/0xe8