Warning: Permanently added '10.128.1.30' (ECDSA) to the list of known hosts. syzkaller login: [ 49.722615] kauditd_printk_skb: 3 callbacks suppressed [ 49.722629] audit: type=1400 audit(1569724566.717:36): avc: denied { map } for pid=7600 comm="syz-executor151" path="/root/syz-executor151972432" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 49.741514] IPVS: ftp: loaded support on port[0] = 21 [ 49.807367] chnl_net:caif_netlink_parms(): no params data found [ 49.840042] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.846821] bridge0: port 1(bridge_slave_0) entered disabled state [ 49.854144] device bridge_slave_0 entered promiscuous mode [ 49.861560] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.867948] bridge0: port 2(bridge_slave_1) entered disabled state [ 49.875080] device bridge_slave_1 entered promiscuous mode [ 49.889504] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 49.898332] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 49.914906] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 49.922784] team0: Port device team_slave_0 added [ 49.928225] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 49.937057] team0: Port device team_slave_1 added [ 49.942338] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 49.949723] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 50.010663] device hsr_slave_0 entered promiscuous mode [ 50.069018] device hsr_slave_1 entered promiscuous mode [ 50.109239] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 50.116446] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 50.130252] bridge0: port 2(bridge_slave_1) entered blocking state [ 50.136680] bridge0: port 2(bridge_slave_1) entered forwarding state [ 50.143691] bridge0: port 1(bridge_slave_0) entered blocking state [ 50.150237] bridge0: port 1(bridge_slave_0) entered forwarding state [ 50.181145] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 50.187249] 8021q: adding VLAN 0 to HW filter on device bond0 [ 50.195423] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 50.204170] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 50.223007] bridge0: port 1(bridge_slave_0) entered disabled state [ 50.230557] bridge0: port 2(bridge_slave_1) entered disabled state [ 50.237661] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 50.248437] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 50.254859] 8021q: adding VLAN 0 to HW filter on device team0 [ 50.264259] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 50.271948] bridge0: port 1(bridge_slave_0) entered blocking state [ 50.278285] bridge0: port 1(bridge_slave_0) entered forwarding state [ 50.287744] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 50.296228] bridge0: port 2(bridge_slave_1) entered blocking state [ 50.302647] bridge0: port 2(bridge_slave_1) entered forwarding state [ 50.321054] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 50.329632] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 50.337337] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 50.348196] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 50.360659] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 50.371322] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready executing program [ 50.377378] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 50.384821] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 50.396700] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 50.407097] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 50.418337] netlink: 80 bytes leftover after parsing attributes in process `syz-executor151'. [ 50.427161] netlink: 48 bytes leftover after parsing attributes in process `syz-executor151'. [ 50.437155] [ 50.438938] ============================= [ 50.443091] WARNING: suspicious RCU usage [ 50.447226] 4.19.75 #0 Not tainted [ 50.450801] ----------------------------- [ 50.454964] include/net/sch_generic.h:419 suspicious rcu_dereference_check() usage! [ 50.462831] [ 50.462831] other info that might help us debug this: [ 50.462831] [ 50.471031] [ 50.471031] rcu_scheduler_active = 2, debug_locks = 1 [ 50.477857] 3 locks held by syz-executor151/7601: [ 50.482902] #0: 00000000c3202c35 (rcu_read_lock_bh){....}, at: ip_finish_output2+0x2b0/0x1730 [ 50.491755] #1: 00000000c3202c35 (rcu_read_lock_bh){....}, at: __dev_queue_xmit+0x214/0x2fe0 [ 50.500573] #2: 000000003b4632a0 (&qdisc_tx_lock){+...}, at: __dev_queue_xmit+0x147c/0x2fe0 [ 50.509239] [ 50.509239] stack backtrace: [ 50.513760] CPU: 1 PID: 7601 Comm: syz-executor151 Not tainted 4.19.75 #0 [ 50.520851] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.530197] Call Trace: [ 50.532825] dump_stack+0x172/0x1f0 [ 50.536446] lockdep_rcu_suspicious+0x153/0x15d [ 50.541111] netem_enqueue+0x1ada/0x28f0 [ 50.545171] ? lock_acquire+0x16f/0x3f0 [ 50.549158] ? kasan_check_write+0x14/0x20 [ 50.553383] ? do_raw_spin_lock+0xc8/0x240 [ 50.557613] __dev_queue_xmit+0x153d/0x2fe0 [ 50.561924] ? mark_held_locks+0x100/0x100 [ 50.566164] ? netdev_pick_tx+0x300/0x300 [ 50.570319] ? ip_finish_output+0x737/0xce0 [ 50.574633] ? find_held_lock+0x35/0x130 [ 50.578693] ? ip_finish_output+0x737/0xce0 [ 50.583017] ? ip_finish_output2+0x1295/0x1730 [ 50.587608] ? ip_finish_output+0x737/0xce0 [ 50.591920] ? ip_finish_output2+0x1295/0x1730 [ 50.596515] dev_queue_xmit+0x18/0x20 [ 50.600302] ? dev_queue_xmit+0x18/0x20 [ 50.604291] ip_finish_output2+0x1041/0x1730 [ 50.608705] ? ip_copy_metadata+0xce0/0xce0 [ 50.613026] ip_finish_output+0x737/0xce0 [ 50.617187] ? ip_finish_output+0x737/0xce0 [ 50.621515] ip_mc_output+0x298/0xf50 [ 50.625308] ? __ip_queue_xmit+0x1bc0/0x1bc0 [ 50.629710] ? ip_fragment.constprop.0+0x240/0x240 [ 50.634650] ? ip_make_skb+0x1b1/0x2c0 [ 50.638538] ? ip_reply_glue_bits+0xc0/0xc0 [ 50.642864] ip_local_out+0xbb/0x190 [ 50.646570] ip_send_skb+0x42/0xf0 [ 50.650098] udp_send_skb.isra.0+0x6bb/0x11d0 [ 50.654585] udp_sendmsg+0x1e04/0x25e0 [ 50.658463] ? ip_reply_glue_bits+0xc0/0xc0 [ 50.662774] ? udp_push_pending_frames+0xf0/0xf0 [ 50.667516] ? __might_fault+0x12b/0x1e0 [ 50.671569] ? find_held_lock+0x35/0x130 [ 50.675627] ? sock_has_perm+0x209/0x2a0 [ 50.679679] ? selinux_secmark_relabel_packet+0xe0/0xe0 [ 50.685046] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 50.690590] ? copy_msghdr_from_user+0x2d0/0x430 [ 50.695337] ? _raw_spin_unlock_bh+0x31/0x40 [ 50.699756] inet_sendmsg+0x141/0x5d0 [ 50.703546] ? inet_sendmsg+0x141/0x5d0 [ 50.707507] ? ipip_gro_receive+0x100/0x100 [ 50.711904] sock_sendmsg+0xd7/0x130 [ 50.715606] ___sys_sendmsg+0x3e2/0x920 [ 50.719568] ? copy_msghdr_from_user+0x430/0x430 [ 50.724402] ? mark_held_locks+0x100/0x100 [ 50.728626] ? ip4_datagram_release_cb+0x259/0xb90 [ 50.733544] ? find_held_lock+0x35/0x130 [ 50.737595] ? ip4_datagram_release_cb+0x259/0xb90 [ 50.742514] ? __might_fault+0x12b/0x1e0 [ 50.746590] ? find_held_lock+0x35/0x130 [ 50.750765] ? __might_fault+0x12b/0x1e0 [ 50.754857] __sys_sendmmsg+0x1bf/0x4e0 [ 50.758825] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 50.763135] ? release_sock+0x156/0x1c0 [ 50.767102] ? __sys_connect+0x12d/0x330 [ 50.771151] ? __ia32_sys_accept+0xb0/0xb0 [ 50.775376] ? __sys_setsockopt+0x1a4/0x280 [ 50.779688] ? kernel_accept+0x310/0x310 [ 50.783748] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.788496] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.793239] ? do_syscall_64+0x26/0x620 [ 50.797219] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.802573] ? do_syscall_64+0x26/0x620 [ 50.806546] __x64_sys_sendmmsg+0x9d/0x100 [ 50.810776] do_syscall_64+0xfd/0x620 [ 50.814568] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.819745] RIP: 0033:0x442259 [ 50.822925] 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 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 50.841819] RSP: 002b:00007ffc62c080b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 50.849531] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442259 [ 50.856810] RDX: 04000000000001a8 RSI: 0000000020007fc0 RDI: 0000000000000005 [ 50.864070] RBP: 00007ffc62c080e0 R08: 0000000000000400 R09: 0000000000000400 [ 50.871328] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 50.878585] R13: 00000000004037f0 R14: 0000000000000000 R15: 0000000000000000