[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.358971][ T26] audit: type=1800 audit(1574808553.599:25): pid=8567 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.404341][ T26] audit: type=1800 audit(1574808553.599:26): pid=8567 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.439596][ T26] audit: type=1800 audit(1574808553.609:27): pid=8567 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?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 '10.128.10.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.723239][ T8719] tipc: Started in network mode [ 63.728410][ T8719] tipc: Own node identity ff000000000000000000000000000001, cluster identity 4711 [ 63.738396][ T8719] tipc: New replicast peer: fe80:0000:0000:0000:dd00:0000:0000:00bb [ 63.747022][ T8719] check_preemption_disabled: 3 callbacks suppressed [ 63.747033][ T8719] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor490/8719 [ 63.763481][ T8719] caller is dst_cache_get+0x3d/0xb0 [ 63.768978][ T8719] CPU: 0 PID: 8719 Comm: syz-executor490 Not tainted 5.4.0-rc8-syzkaller #0 [ 63.777660][ T8719] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.787694][ T8719] Call Trace: [ 63.790967][ T8719] dump_stack+0x197/0x210 [ 63.795275][ T8719] debug_smp_processor_id.cold+0x87/0x9d [ 63.800897][ T8719] dst_cache_get+0x3d/0xb0 [ 63.805293][ T8719] tipc_udp_xmit.isra.0+0xc4/0xb80 [ 63.810412][ T8719] ? kasan_kmalloc+0x9/0x10 [ 63.814894][ T8719] ? tipc_udp_addr2str+0x170/0x170 [ 63.819982][ T8719] ? __copy_skb_header+0x2e8/0x560 [ 63.825082][ T8719] ? skb_ts_finish+0xb0/0xb0 [ 63.829661][ T8719] ? __kmalloc_reserve.isra.0+0xf0/0xf0 [ 63.835205][ T8719] ? skb_copy_header+0x21/0x2b0 [ 63.840032][ T8719] ? __pskb_copy_fclone+0x516/0xc90 [ 63.845208][ T8719] ? rcu_read_lock_held+0x9c/0xb0 [ 63.850214][ T8719] ? rcu_read_lock_held_common+0x130/0x130 [ 63.856000][ T8719] tipc_udp_send_msg+0x29a/0x490 [ 63.860921][ T8719] tipc_bearer_xmit_skb+0x219/0x480 [ 63.866098][ T8719] ? tipc_bearer_mtu+0x4f0/0x4f0 [ 63.871014][ T8719] ? tipc_disc_create+0x729/0xae0 [ 63.876016][ T8719] tipc_enable_bearer+0xb1d/0xd90 [ 63.881022][ T8719] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 63.886894][ T8719] ? tipc_bearer_xmit_skb+0x480/0x480 [ 63.892247][ T8719] ? nla_memcpy+0xb0/0xb0 [ 63.896563][ T8719] __tipc_nl_bearer_enable+0x2de/0x3a0 [ 63.902002][ T8719] ? __tipc_nl_bearer_enable+0x2de/0x3a0 [ 63.907623][ T8719] ? tipc_nl_bearer_disable+0x40/0x40 [ 63.912971][ T8719] ? nla_memcpy+0xb0/0xb0 [ 63.917282][ T8719] ? __nla_parse+0x43/0x60 [ 63.921685][ T8719] tipc_nl_bearer_enable+0x23/0x40 [ 63.926809][ T8719] genl_rcv_msg+0x67d/0xea0 [ 63.931303][ T8719] ? genl_family_rcv_msg_attrs_parse+0x300/0x300 [ 63.937644][ T8719] ? __kasan_check_read+0x11/0x20 [ 63.942656][ T8719] ? __lock_acquire+0x8a0/0x4a00 [ 63.947583][ T8719] ? find_held_lock+0x35/0x130 [ 63.952425][ T8719] netlink_rcv_skb+0x177/0x450 [ 63.957184][ T8719] ? genl_family_rcv_msg_attrs_parse+0x300/0x300 [ 63.963488][ T8719] ? netlink_ack+0xb50/0xb50 [ 63.968057][ T8719] ? __kasan_check_write+0x14/0x20 [ 63.973149][ T8719] ? netlink_deliver_tap+0x254/0xbf0 [ 63.978426][ T8719] genl_rcv+0x29/0x40 [ 63.982387][ T8719] netlink_unicast+0x531/0x710 [ 63.987133][ T8719] ? netlink_attachskb+0x7c0/0x7c0 [ 63.992251][ T8719] ? _copy_from_iter_full+0x25d/0x8c0 [ 63.997602][ T8719] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 64.003310][ T8719] ? __check_object_size+0x3d/0x437 [ 64.008501][ T8719] netlink_sendmsg+0x8a5/0xd60 [ 64.013253][ T8719] ? netlink_unicast+0x710/0x710 [ 64.018176][ T8719] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 64.023712][ T8719] ? apparmor_socket_sendmsg+0x2a/0x30 [ 64.029152][ T8719] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.035389][ T8719] ? security_socket_sendmsg+0x8d/0xc0 [ 64.040829][ T8719] ? netlink_unicast+0x710/0x710 [ 64.045760][ T8719] sock_sendmsg+0xd7/0x130 [ 64.050177][ T8719] ___sys_sendmsg+0x803/0x920 [ 64.054854][ T8719] ? copy_msghdr_from_user+0x440/0x440 [ 64.060304][ T8719] ? lock_downgrade+0x920/0x920 [ 64.065240][ T8719] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 64.071054][ T8719] ? lockdep_hardirqs_on+0x421/0x5e0 [ 64.076346][ T8719] ? __kasan_check_read+0x11/0x20 [ 64.081391][ T8719] ? mark_lock+0xc2/0x1220 [ 64.085880][ T8719] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 64.091688][ T8719] ? __kasan_check_read+0x11/0x20 [ 64.096692][ T8719] ? __lock_acquire+0x16f2/0x4a00 [ 64.101693][ T8719] ? debug_object_deactivate+0x320/0x320 [ 64.107343][ T8719] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 64.113479][ T8719] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 64.119700][ T8719] ? __fget_light+0x1a9/0x230 [ 64.124354][ T8719] ? __fdget+0x1b/0x20 [ 64.128398][ T8719] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 64.134616][ T8719] __sys_sendmsg+0x105/0x1d0 [ 64.139184][ T8719] ? __sys_sendmsg_sock+0xd0/0xd0 [ 64.144195][ T8719] ? lockdep_hardirqs_on+0x421/0x5e0 [ 64.149476][ T8719] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 64.154916][ T8719] ? do_syscall_64+0x26/0x760 [ 64.159586][ T8719] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.165653][ T8719] ? do_syscall_64+0x26/0x760 [ 64.170383][ T8719] __x64_sys_sendmsg+0x78/0xb0 [ 64.175131][ T8719] do_syscall_64+0xfa/0x760 [ 64.179621][ T8719] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 64.185634][ T8719] RIP: 0033:0x4441f9 [ 64.189522][ T8719] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.209247][ T8719] RSP: 002b:00007ffc303342e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 64.218075][ T8719] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 00000000004441f9