[....] Starting enhanced syslogd: rsyslogd[ 17.609646] audit: type=1400 audit(1518207943.923:5): avc: denied { syslog } for pid=4021 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: [ 22.350311] audit: type=1400 audit(1518207948.663:6): avc: denied { map } for pid=4163 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 '10.128.0.7' (ECDSA) to the list of known hosts. executing program [ 28.663659] audit: type=1400 audit(1518207954.977:7): avc: denied { map } for pid=4177 comm="syzkaller605272" path="/root/syzkaller605272853" 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 [ 28.666439] [ 28.689632] audit: type=1400 audit(1518207954.979:8): avc: denied { create } for pid=4177 comm="syzkaller605272" 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 [ 28.691328] ============================= [ 28.715205] audit: type=1400 audit(1518207954.979:9): avc: denied { write } for pid=4177 comm="syzkaller605272" 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 [ 28.719337] WARNING: suspicious RCU usage [ 28.747294] 4.15.0+ #221 Not tainted [ 28.751036] ----------------------------- [ 28.755189] net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage! [ 28.762646] [ 28.762646] other info that might help us debug this: [ 28.762646] [ 28.770803] [ 28.770803] rcu_scheduler_active = 2, debug_locks = 1 [ 28.777480] 2 locks held by syzkaller605272/4177: [ 28.782329] #0: (cb_lock){++++}, at: [<000000002133adcd>] genl_rcv+0x19/0x40 [ 28.789715] #1: (genl_mutex){+.+.}, at: [<000000004f214542>] genl_rcv_msg+0x115/0x140 [ 28.797881] [ 28.797881] stack backtrace: [ 28.802390] CPU: 1 PID: 4177 Comm: syzkaller605272 Not tainted 4.15.0+ #221 [ 28.809470] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.818795] Call Trace: [ 28.821365] dump_stack+0x194/0x257 [ 28.824966] ? arch_local_irq_restore+0x53/0x53 [ 28.829616] lockdep_rcu_suspicious+0x123/0x170 [ 28.834262] tipc_bearer_find+0x2b4/0x3b0 [ 28.838384] ? tipc_media_addr_printf+0x3a0/0x3a0 [ 28.843207] tipc_nl_compat_link_set+0x329/0x9f0 [ 28.847940] tipc_nl_compat_doit+0x15b/0x670 [ 28.852321] ? security_capable+0x8e/0xc0 [ 28.856452] ? tipc_nl_compat_link_stat_dump+0x3000/0x3000 [ 28.862058] ? ns_capable_common+0xcf/0x160 [ 28.866354] ? ns_capable+0x22/0x30 [ 28.869955] ? __netlink_ns_capable+0xe1/0x120 [ 28.874514] tipc_nl_compat_recv+0x1135/0x18f0 [ 28.879072] ? tipc_nl_compat_doit+0x670/0x670 [ 28.883629] ? tipc_nl_node_dump+0x1290/0x1290 [ 28.888189] ? tipc_nl_compat_bearer_enable+0x5c0/0x5c0 [ 28.893525] ? __save_stack_trace+0x7e/0xd0 [ 28.897843] genl_family_rcv_msg+0x7b7/0xfb0 [ 28.902228] ? genl_rcv+0x40/0x40 [ 28.905654] ? lock_downgrade+0x980/0x980 [ 28.909776] ? lock_release+0xa40/0xa40 [ 28.913725] ? __lock_is_held+0xb6/0x140 [ 28.917771] ? netlink_deliver_tap+0x2e9/0xf90 [ 28.922333] genl_rcv_msg+0xb2/0x140 [ 28.926030] netlink_rcv_skb+0x14b/0x380 [ 28.930067] ? genl_family_rcv_msg+0xfb0/0xfb0 [ 28.934623] ? netlink_ack+0xa10/0xa10 [ 28.938488] ? genl_rcv+0x19/0x40 [ 28.941914] ? netlink_skb_destructor+0x1d0/0x1d0 [ 28.946730] ? selinux_nlmsg_lookup+0x32b/0x430 [ 28.951381] genl_rcv+0x28/0x40 [ 28.954634] netlink_unicast+0x4c4/0x6b0 [ 28.958673] ? netlink_attachskb+0x8a0/0x8a0 [ 28.963063] ? security_netlink_send+0x81/0xb0 [ 28.967619] netlink_sendmsg+0xa4a/0xe60 [ 28.971660] ? netlink_unicast+0x6b0/0x6b0 [ 28.975872] ? security_socket_sendmsg+0x89/0xb0 [ 28.980599] ? netlink_unicast+0x6b0/0x6b0 [ 28.984816] sock_sendmsg+0xca/0x110 [ 28.988524] ___sys_sendmsg+0x767/0x8b0 [ 28.992486] ? copy_msghdr_from_user+0x590/0x590 [ 28.997221] ? __do_page_fault+0x5f7/0xc90 [ 29.001433] ? lock_downgrade+0x980/0x980 [ 29.005562] ? __fget_light+0x297/0x380 [ 29.009507] ? fget_raw+0x20/0x20 [ 29.012935] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 29.017487] ? vmacache_find+0x5f/0x280 [ 29.021448] ? up_read+0x1a/0x40 [ 29.024787] ? __do_page_fault+0x3d6/0xc90 [ 29.028991] ? get_unused_fd_flags+0x190/0x190 [ 29.033554] ? __fdget+0x18/0x20 [ 29.036900] __sys_sendmsg+0xe5/0x210 [ 29.040675] ? __sys_sendmsg+0xe5/0x210 [ 29.044622] ? SyS_shutdown+0x290/0x290 [ 29.048571] ? __do_page_fault+0xc90/0xc90 [ 29.052782] ? fd_install+0x4d/0x60 [ 29.056397] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.061396] SyS_sendmsg+0x2d/0x50 [ 29.064911] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 29.069635] RIP: 0033:0x43fdd9 [ 29.072795] RSP: 002b:00007ffcef9fe918 EFLAGS: 00000203 ORIG_RAX: 000000000000002e [ 29.080474] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fdd9 [ 29.087716] RDX: 0000000000000000 RSI: 0000000020003000 RDI: 0000000000000003 [ 29.094955] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 29.102198] R10: 0000000000000000 R11: 0000000000000203 R12: 0000000000401700 [ 29.109438] R13: 0000000000401790 R14: 0000000000000000 R15: 000000000