[....] Starting enhanced syslogd: rsyslogd[ 13.108199] audit: type=1400 audit(1516713678.471:5): avc: denied { syslog } for pid=3501 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: [ 18.833452] audit: type=1400 audit(1516713684.197:6): avc: denied { map } for pid=3641 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 '10.128.0.31' (ECDSA) to the list of known hosts. executing program [ 25.133157] audit: type=1400 audit(1516713690.496:7): avc: denied { map } for pid=3655 comm="syzkaller241398" path="/root/syzkaller241398572" 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 [ 25.170563] audit: type=1400 audit(1516713690.534:8): avc: denied { map_create } for pid=3656 comm="syzkaller241398" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 [ 25.171362] [ 25.171365] ============================= [ 25.171367] WARNING: suspicious RCU usage [ 25.171372] 4.15.0-rc8+ #1 Not tainted [ 25.171375] ----------------------------- [ 25.171380] ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! [ 25.171382] [ 25.171382] other info that might help us debug this: [ 25.171382] [ 25.171386] [ 25.171386] rcu_scheduler_active = 2, debug_locks = 1 [ 25.171390] 1 lock held by syzkaller241398/3656: [ 25.171393] #0: (rcu_read_lock){....}, at: [<00000000eacbc80c>] SyS_bpf+0x1105/0x4860 [ 25.171414] [ 25.171414] stack backtrace: [ 25.171421] CPU: 1 PID: 3656 Comm: syzkaller241398 Not tainted 4.15.0-rc8+ #1 [ 25.171426] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.171428] Call Trace: [ 25.171440] dump_stack+0x194/0x257 [ 25.171454] ? arch_local_irq_restore+0x53/0x53 [ 25.171482] lockdep_rcu_suspicious+0x123/0x170 [ 25.171496] ___might_sleep+0x385/0x470 [ 25.171506] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 25.171517] ? _raw_spin_unlock_irqrestore+0x31/0xba [ 25.171528] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 25.171543] __might_sleep+0x95/0x190 [ 25.171560] __kmalloc+0x2c5/0x760 [ 25.171579] ? trie_get_next_key+0x517/0xf10 [ 25.171594] trie_get_next_key+0x517/0xf10 [ 25.171621] ? trie_lookup_elem+0x7d0/0x7d0 [ 25.171649] ? lock_acquire+0x1d5/0x580 [ 25.171655] ? lock_acquire+0x1d5/0x580 [ 25.171660] ? SyS_bpf+0x1105/0x4860 [ 25.171675] ? lock_release+0xa40/0xa40 [ 25.171683] ? rcu_read_lock_sched_held+0x108/0x120 [ 25.171690] ? __kmalloc+0x46e/0x760 [ 25.171700] ? rcutorture_record_progress+0x10/0x10 [ 25.171709] ? SyS_bpf+0x10bd/0x4860 [ 25.171722] SyS_bpf+0x11b4/0x4860 [ 25.171741] ? bpf_prog_get+0x20/0x20 [ 25.171755] ? lock_release+0xa40/0xa40 [ 25.171772] ? do_raw_spin_trylock+0x190/0x190 [ 25.171796] ? _raw_spin_unlock+0x22/0x30 [ 25.171805] ? __handle_mm_fault+0x80e/0x3ce0 [ 25.171819] ? check_noncircular+0x20/0x20 [ 25.171824] ? __pmd_alloc+0x4e0/0x4e0 [ 25.171832] ? vma_link+0xe9/0x170 [ 25.171845] ? find_held_lock+0x35/0x1d0 [ 25.171863] ? handle_mm_fault+0x248/0x8d0 [ 25.171874] ? find_held_lock+0x35/0x1d0 [ 25.171893] ? __do_page_fault+0x5f7/0xc90 [ 25.171901] ? lock_downgrade+0x980/0x980 [ 25.171919] ? handle_mm_fault+0x410/0x8d0 [ 25.171924] ? down_read_trylock+0xdb/0x170 [ 25.171929] ? __do_page_fault+0x32d/0xc90 [ 25.171937] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 25.171942] ? vmacache_find+0x5f/0x280 [ 25.171959] ? up_read+0x1a/0x40 [ 25.171967] ? __do_page_fault+0x3d6/0xc90 [ 25.171984] ? mm_fault_error+0x2c0/0x2c0 [ 25.172010] ? do_page_fault+0xee/0x720 [ 25.172020] ? __do_page_fault+0xc90/0xc90 [ 25.172038] ? SyS_mmap_pgoff+0x243/0x5f0 [ 25.172058] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.172073] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 25.172079] RIP: 0033:0x4407f9 [ 25.172082]