[....] Starting enhanced syslogd: rsyslogd[ 17.040614] audit: type=1400 audit(1518208795.201:5): avc: denied { syslog } for pid=4018 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: [ 23.270869] audit: type=1400 audit(1518208801.431:6): avc: denied { map } for pid=4159 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 '10.128.0.50' (ECDSA) to the list of known hosts. [ 29.576648] audit: type=1400 audit(1518208807.737:7): avc: denied { map } for pid=4173 comm="syzkaller454180" path="/root/syzkaller454180077" 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 [ 29.578955] executing program [ 29.602552] audit: type=1400 audit(1518208807.737:8): avc: denied { create } for pid=4173 comm="syzkaller454180" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 29.604293] ============================= [ 29.628057] audit: type=1400 audit(1518208807.737:9): avc: denied { write } for pid=4173 comm="syzkaller454180" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 29.632181] WARNING: suspicious RCU usage [ 29.632188] 4.15.0+ #221 Not tainted [ 29.663754] ----------------------------- [ 29.667894] net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage! [ 29.675320] [ 29.675320] other info that might help us debug this: [ 29.675320] [ 29.683452] [ 29.683452] rcu_scheduler_active = 2, debug_locks = 1 [ 29.690098] 2 locks held by syzkaller454180/4173: [ 29.694931] #0: (cb_lock){++++}, at: [<0000000052e6627e>] genl_rcv+0x19/0x40 [ 29.702300] #1: (genl_mutex){+.+.}, at: [<00000000a8a4928b>] genl_rcv_msg+0x115/0x140 [ 29.710446] [ 29.710446] stack backtrace: [ 29.714929] CPU: 1 PID: 4173 Comm: syzkaller454180 Not tainted 4.15.0+ #221 [ 29.721995] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.731320] Call Trace: [ 29.733879] dump_stack+0x194/0x257 [ 29.737478] ? arch_local_irq_restore+0x53/0x53 [ 29.742127] lockdep_rcu_suspicious+0x123/0x170 [ 29.746770] tipc_bearer_find+0x2b4/0x3b0 [ 29.750892] ? tipc_media_addr_printf+0x3a0/0x3a0 [ 29.755713] tipc_nl_compat_link_set+0x329/0x9f0 [ 29.760445] tipc_nl_compat_doit+0x15b/0x670 [ 29.764826] ? security_capable+0x8e/0xc0 [ 29.768946] ? tipc_nl_compat_link_stat_dump+0x3000/0x3000 [ 29.774543] ? ns_capable_common+0xcf/0x160 [ 29.778835] ? ns_capable+0x22/0x30 [ 29.782434] ? __netlink_ns_capable+0xe1/0x120 [ 29.786996] tipc_nl_compat_recv+0x1135/0x18f0 [ 29.791553] ? tipc_nl_compat_doit+0x670/0x670 [ 29.796106] ? tipc_nl_node_dump+0x1290/0x1290 [ 29.800654] ? tipc_nl_compat_bearer_enable+0x5c0/0x5c0 [ 29.805986] ? __save_stack_trace+0x7e/0xd0 [ 29.810302] genl_family_rcv_msg+0x7b7/0xfb0 [ 29.814687] ? genl_rcv+0x40/0x40 [ 29.818428] ? lock_downgrade+0x980/0x980 [ 29.822552] ? lock_release+0xa40/0xa40 [ 29.826502] ? __lock_is_held+0xb6/0x140 [ 29.830545] ? netlink_deliver_tap+0x2e9/0xf90 [ 29.835103] genl_rcv_msg+0xb2/0x140 [ 29.838793] netlink_rcv_skb+0x14b/0x380 [ 29.842824] ? genl_family_rcv_msg+0xfb0/0xfb0 [ 29.847377] ? netlink_ack+0xa10/0xa10 [ 29.851231] ? genl_rcv+0x19/0x40 [ 29.854656] ? netlink_skb_destructor+0x1d0/0x1d0 [ 29.859470] ? selinux_nlmsg_lookup+0x32b/0x430 [ 29.864110] genl_rcv+0x28/0x40 [ 29.867359] netlink_unicast+0x4c4/0x6b0 [ 29.871398] ? netlink_attachskb+0x8a0/0x8a0 [ 29.875785] ? security_netlink_send+0x81/0xb0 [ 29.880341] netlink_sendmsg+0xa4a/0xe60 [ 29.884379] ? netlink_unicast+0x6b0/0x6b0 [ 29.888586] ? security_socket_sendmsg+0x89/0xb0 [ 29.893315] ? netlink_unicast+0x6b0/0x6b0 [ 29.897531] sock_sendmsg+0xca/0x110 [ 29.901217] ___sys_sendmsg+0x767/0x8b0 [ 29.905165] ? copy_msghdr_from_user+0x590/0x590 [ 29.909900] ? __do_page_fault+0x5f7/0xc90 [ 29.914104] ? lock_downgrade+0x980/0x980 [ 29.918234] ? __fget_light+0x297/0x380 [ 29.922178] ? fget_raw+0x20/0x20 [ 29.925601] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 29.930149] ? vmacache_find+0x5f/0x280 [ 29.934101] ? up_read+0x1a/0x40 [ 29.937435] ? __do_page_fault+0x3d6/0xc90 [ 29.941638] ? get_unused_fd_flags+0x190/0x190 [ 29.946197] ? __fdget+0x18/0x20 [ 29.949536] __sys_sendmsg+0xe5/0x210 [ 29.953304] ? __sys_sendmsg+0xe5/0x210 [ 29.957250] ? SyS_shutdown+0x290/0x290 [ 29.961197] ? __do_page_fault+0xc90/0xc90 [ 29.965405] ? fd_install+0x4d/0x60 [ 29.969013] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.974003] SyS_sendmsg+0x2d/0x50 [ 29.977517] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 29.982242] RIP: 0033:0x43fd69 [ 29.985402] RSP: 002b:00007ffcd4ecfcd8 EFLAGS: 00000203 ORIG_RAX: 000000000000002e [ 29.993077] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd69 [ 30.000323] RDX: 0000000000000000 RSI: 0000000020003000 RDI: 0000000000000003 [ 30.007562] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 30.014811] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000401690 [ 30.022049] R13: 0000000000401720 R14: 0000000000000000 R15: 0000000000000