Warning: Permanently added '10.128.0.104' (ECDSA) to the list of known hosts. 2019/06/27 06:25:07 parsed 1 programs 2019/06/27 06:25:09 executed programs: 0 syzkaller login: [ 71.416578] audit: type=1400 audit(1561616710.191:5): avc: denied { associate } for pid=2423 comm="syz-executor.0" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 [ 71.458900] [ 71.460567] =============================== [ 71.464940] [ INFO: suspicious RCU usage. ] [ 71.469356] 4.9.183+ #4 Not tainted [ 71.472971] ------------------------------- [ 71.477382] ./include/linux/inetdevice.h:205 suspicious rcu_dereference_check() usage! [ 71.485448] [ 71.485448] other info that might help us debug this: [ 71.485448] [ 71.493660] [ 71.493660] rcu_scheduler_active = 2, debug_locks = 0 [ 71.500376] 4 locks held by syz-executor.0/2571: [ 71.505148] #0: (rcu_read_lock_bh){......}, at: [<00000000567d27dc>] ip_finish_output2+0x20b/0x1280 [ 71.515125] #1: (rcu_read_lock_bh){......}, at: [<0000000026d544b0>] __dev_queue_xmit+0x1d4/0x1bd0 [ 71.525241] #2: (_xmit_TUNNEL6#2){+.....}, at: [<00000000edae2c9d>] __dev_queue_xmit+0x1116/0x1bd0 [ 71.535299] #3: (slock-AF_INET){+.-...}, at: [<0000000080493b56>] __icmp_send+0x48b/0x1420 [ 71.544532] [ 71.544532] stack backtrace: [ 71.549046] CPU: 0 PID: 2571 Comm: syz-executor.0 Not tainted 4.9.183+ #4 [ 71.556053] ffff8801c8696dd8 ffffffff81b580a1 ffff8801cbfb98c0 0000000000000000 [ 71.564108] 0000000000000002 00000000000000cd ffff8801c8b78000 ffff8801c8696e08 [ 71.572134] ffffffff81404fb9 ffff8801cbfb9918 ffff8801c8696f28 ffff8801d9436600 [ 71.580267] Call Trace: [ 71.582855] [<00000000d00a6003>] dump_stack+0xc1/0x120 [ 71.588216] [<000000003097ab8e>] lockdep_rcu_suspicious.cold+0x10a/0x149 [ 71.595415] [<000000003b2e0031>] fib_compute_spec_dst+0x6c4/0xcc0 [ 71.601720] [<0000000084dd2127>] ? fib_unmerge+0x4c0/0x4c0 [ 71.607431] [<000000007d790763>] ? trace_hardirqs_on+0x10/0x10 [ 71.613508] [<000000001d793b29>] ? __lock_acquire+0x5e5/0x4350 [ 71.619572] [<000000009716359f>] __ip_options_echo+0x4be/0x13e0 [ 71.625698] [<0000000067a0bd5b>] __icmp_send+0x648/0x1420 [ 71.631475] [<0000000026e5538c>] ? __icmp_send+0xc07/0x1420 [ 71.637262] [<000000001d793b29>] ? __lock_acquire+0x5e5/0x4350 [ 71.643342] [<000000006798758c>] ? icmpv4_xrlim_allow.isra.0+0x2d0/0x2d0 [ 71.650711] [<00000000c470e1f3>] ? trace_hardirqs_on_caller+0x260/0x5a0 [ 71.657664] [<0000000053d03ac1>] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 71.664370] [<000000006f406b13>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 71.671216] [<00000000adb9664d>] ? retint_kernel+0x2d/0x2d [ 71.677436] [<0000000042d30a90>] ? check_preemption_disabled+0x3c/0x200 [ 71.684357] [<00000000093b5cdb>] ? ipv4_link_failure+0x410/0x850 [ 71.690690] [<0000000080c934e6>] ipv4_link_failure+0x460/0x850 [ 71.696735] [<000000001380a164>] ? ipv4_link_failure+0x32b/0x850 [ 71.702957] [<00000000ca45b8dd>] ? rt_dst_alloc+0x450/0x450 [ 71.708978] [<00000000ca45b8dd>] ? rt_dst_alloc+0x450/0x450 [ 71.714853] [<000000003a824d69>] vti6_tnl_xmit+0xb08/0x17f0 [ 71.720631] [<0000000039b37e25>] ? vti6_dellink+0x270/0x270 [ 71.726425] [<000000005f752de0>] dev_hard_start_xmit+0x195/0x8b0 [ 71.732835] [<00000000c044ecb3>] __dev_queue_xmit+0x11a3/0x1bd0 [ 71.738967] [<0000000026d544b0>] ? __dev_queue_xmit+0x1d4/0x1bd0 [ 71.745279] [<00000000fe7f829a>] ? __local_bh_enable_ip+0x6a/0xe0 [ 71.751683] [<00000000a1fd4cd9>] ? netdev_pick_tx+0x300/0x300 [ 71.757653] [<0000000034bf1211>] ? __neigh_create+0x96e/0x1b30 [ 71.763706] [<000000007173e55b>] dev_queue_xmit+0x18/0x20 [ 71.769337] [<0000000076422586>] neigh_direct_output+0x16/0x20 [ 71.775648] [<0000000000d1aba9>] ip_finish_output2+0x6a2/0x1280 [ 71.781782] [<00000000567d27dc>] ? ip_finish_output2+0x20b/0x1280 [ 71.788181] [<0000000073845ff6>] ? rcu_read_lock_held+0x9e/0xc0 [ 71.794428] [<000000005561dcdb>] ? nf_iterate+0x19e/0x310 [ 71.800039] [<000000009709f755>] ? ip_send_check+0xb0/0xb0 [ 71.805858] [<000000006f406b13>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 71.812625] [<0000000070e01057>] ? nf_hook_slow+0x12f/0x1f0 [ 71.818681] [<00000000b6322a0f>] ip_finish_output+0x3c4/0xce0 [ 71.824639] [<00000000f42402eb>] ip_output+0x1ec/0x5b0 [ 71.829983] [<000000006247428f>] ? ip_output+0x287/0x5b0 [ 71.835544] [<000000005bd5a4b0>] ? ip_mc_output+0xcb0/0xcb0 [ 71.841413] [<00000000c5fda04c>] ? nf_hook_slow+0x62/0x1f0 [ 71.847106] [<000000007cfa6694>] ? ip_fragment.constprop.0+0x210/0x210 [ 71.854208] [<0000000042d30a90>] ? check_preemption_disabled+0x3c/0x200 [ 71.861066] [<00000000574e54ba>] ? raw_sendmsg+0x1929/0x23e0 [ 71.866945] [<00000000ce157361>] raw_sendmsg+0x1c5c/0x23e0 [ 71.872731] [<00000000318144b2>] ? raw_sendmsg+0x1851/0x23e0 [ 71.879088] [<00000000554660bd>] ? avc_has_perm+0x164/0x3a0 [ 71.884882] [<00000000c6c36d93>] ? compat_raw_setsockopt+0xd0/0xd0 [ 71.891357] [<000000001d793b29>] ? __lock_acquire+0x5e5/0x4350 [ 71.897397] [<000000006f406b13>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 71.904249] [<0000000042d30a90>] ? check_preemption_disabled+0x3c/0x200 [ 71.911100] [<0000000054067727>] ? trace_hardirqs_on_caller+0x4f2/0x5a0 [ 71.917927] [<0000000046ae9d4b>] ? ip4_datagram_release_cb+0x970/0x970 [ 71.924673] [<00000000dbc4b869>] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 71.932200] [<000000006f406b13>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 71.939117] [<0000000042d30a90>] ? check_preemption_disabled+0x3c/0x200 [ 71.946241] [<0000000042d30a90>] ? check_preemption_disabled+0x3c/0x200 [ 71.953275] [<0000000042d30a90>] ? check_preemption_disabled+0x3c/0x200 [ 71.960140] [<0000000089781226>] ? inet_sendmsg+0x143/0x4d0 [ 71.966100] [<000000007a8eee37>] inet_sendmsg+0x202/0x4d0 [ 71.971804] [<00000000195d4e10>] ? inet_sendmsg+0x76/0x4d0 [ 71.977503] [<00000000164be32f>] ? inet_recvmsg+0x4d0/0x4d0 [ 71.983415] [<00000000aa7a3c70>] sock_sendmsg+0xbe/0x110 [ 71.988967] [<00000000b4141dd8>] sock_write_iter+0x235/0x3d0 [ 71.994833] [<00000000aae3cdcd>] ? sock_sendmsg+0x110/0x110 [ 72.000611] [<0000000000b6f171>] ? iov_iter_init+0xaf/0x1d0 [ 72.006489] [<00000000c6513f40>] __vfs_write+0x3c1/0x560 [ 72.012011] [<00000000a7a86e56>] ? bpf_fd_pass+0x270/0x270 [ 72.017703] [<0000000015c6e1a6>] ? __vfs_read+0x550/0x550 [ 72.023323] [<000000001f9464ef>] ? trace_hardirqs_on+0xd/0x10 [ 72.029467] [<000000004c9ba68d>] ? selinux_file_permission+0x85/0x470 [ 72.036136] [<00000000362c9529>] ? security_file_permission+0x8f/0x1f0 [ 72.042891] [<0000000010871ccd>] ? rw_verify_area+0xea/0x2b0 [ 72.048870] [<0000000068bba18a>] vfs_write+0x185/0x520 [ 72.054220] [<0000000046fc9064>] SyS_write+0x121/0x270 [ 72.059568] [<00000000