Warning: Permanently added '10.128.10.44' (ECDSA) to the list of known hosts. 2019/06/27 09:36:03 parsed 1 programs 2019/06/27 09:36:05 executed programs: 0 syzkaller login: [ 36.363856] audit: type=1400 audit(1561628165.857:5): avc: denied { associate } for pid=2078 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 [ 36.403747] [ 36.405414] =============================== [ 36.409742] [ INFO: suspicious RCU usage. ] [ 36.414149] 4.9.183+ #4 Not tainted [ 36.417794] ------------------------------- [ 36.422104] ./include/linux/inetdevice.h:205 suspicious rcu_dereference_check() usage! [ 36.430185] [ 36.430185] other info that might help us debug this: [ 36.430185] [ 36.438346] [ 36.438346] rcu_scheduler_active = 2, debug_locks = 0 [ 36.445020] 4 locks held by syz-executor.0/2226: [ 36.449883] #0: (rcu_read_lock_bh){......}, at: [<00000000c5940ef2>] ip_finish_output2+0x20b/0x1280 [ 36.460091] #1: (rcu_read_lock_bh){......}, at: [<000000004906d2d5>] __dev_queue_xmit+0x1d4/0x1bd0 [ 36.469929] #2: (_xmit_TUNNEL6#2){+.....}, at: [<00000000d2778364>] __dev_queue_xmit+0x1116/0x1bd0 [ 36.479869] #3: (slock-AF_INET){+.-...}, at: [<000000005ae1bfeb>] __icmp_send+0x48b/0x1420 [ 36.489034] [ 36.489034] stack backtrace: [ 36.493624] CPU: 0 PID: 2226 Comm: syz-executor.0 Not tainted 4.9.183+ #4 [ 36.500582] ffff8801cb056dd8 ffffffff81b580a1 ffff8801d24d08c0 0000000000000000 [ 36.508606] 0000000000000002 00000000000000cd ffff8801cb5b4740 ffff8801cb056e08 [ 36.516622] ffffffff81404fb9 ffff8801d24d0918 ffff8801cb056f28 ffff8801ce0b0000 [ 36.524651] Call Trace: [ 36.527266] [<00000000b3225a42>] dump_stack+0xc1/0x120 [ 36.532648] [<00000000ca097d23>] lockdep_rcu_suspicious.cold+0x10a/0x149 [ 36.539575] [<00000000ec0ed201>] fib_compute_spec_dst+0x6c4/0xcc0 [ 36.545886] [<000000003faea670>] ? fib_unmerge+0x4c0/0x4c0 [ 36.551637] [<00000000569ef5c5>] ? trace_hardirqs_on+0x10/0x10 [ 36.557692] [<0000000020c5adaa>] ? __lock_acquire+0x5e5/0x4350 [ 36.563750] [<00000000e9320994>] __ip_options_echo+0x4be/0x13e0 [ 36.569887] [<0000000097f5256e>] __icmp_send+0x648/0x1420 [ 36.575490] [<0000000044f22122>] ? __icmp_send+0xc07/0x1420 [ 36.581274] [<0000000020c5adaa>] ? __lock_acquire+0x5e5/0x4350 [ 36.587333] [<00000000b210bf02>] ? icmpv4_xrlim_allow.isra.0+0x2d0/0x2d0 [ 36.594536] [<00000000569ef5c5>] ? trace_hardirqs_on+0x10/0x10 [ 36.600610] [<0000000099137b40>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 36.607370] [<0000000005cbbed6>] ? __ip_options_compile+0x668/0x13c0 [ 36.613947] [<0000000046088d3f>] ? check_preemption_disabled+0x3c/0x200 [ 36.620797] [<0000000057ad7f66>] ? ipv4_link_failure+0x410/0x850 [ 36.627108] [<00000000cecf0234>] ipv4_link_failure+0x460/0x850 [ 36.633497] [<00000000bffed04c>] ? ipv4_link_failure+0x32b/0x850 [ 36.639715] [<00000000c96912e3>] ? rt_dst_alloc+0x450/0x450 [ 36.645517] [<00000000c96912e3>] ? rt_dst_alloc+0x450/0x450 [ 36.651523] [<00000000e7613375>] vti6_tnl_xmit+0xb08/0x17f0 [ 36.657342] [<000000008fda4830>] ? vti6_dellink+0x270/0x270 [ 36.663130] [<00000000a169d3c0>] dev_hard_start_xmit+0x195/0x8b0 [ 36.669627] [<000000001c3e7a60>] __dev_queue_xmit+0x11a3/0x1bd0 [ 36.675751] [<000000004906d2d5>] ? __dev_queue_xmit+0x1d4/0x1bd0 [ 36.681988] [<0000000007d973d4>] ? __local_bh_enable_ip+0x6a/0xe0 [ 36.688305] [<00000000bdf3da30>] ? netdev_pick_tx+0x300/0x300 [ 36.694285] [<0000000085b7e204>] ? __neigh_create+0x96e/0x1b30 [ 36.700334] [<00000000a7305b31>] dev_queue_xmit+0x18/0x20 [ 36.716458] [<000000008999fedf>] neigh_direct_output+0x16/0x20 [ 36.722526] [<00000000229d2d30>] ip_finish_output2+0x6a2/0x1280 [ 36.728650] [<00000000c5940ef2>] ? ip_finish_output2+0x20b/0x1280 [ 36.734955] [<00000000de5ebbfd>] ? rcu_read_lock_held+0x9e/0xc0 [ 36.741088] [<00000000c4b2fe4a>] ? nf_iterate+0x19e/0x310 [ 36.746696] [<0000000060ef94e1>] ? ip_send_check+0xb0/0xb0 [ 36.752414] [<0000000099137b40>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 36.759149] [<000000008e6017b7>] ? nf_hook_slow+0x12f/0x1f0 [ 36.764932] [<00000000e2b3aed9>] ip_finish_output+0x3c4/0xce0 [ 36.772274] [<00000000d28d90d4>] ip_output+0x1ec/0x5b0 [ 36.777724] [<000000001a29a1f1>] ? ip_output+0x287/0x5b0 [ 36.783337] [<00000000a0f3aa60>] ? ip_mc_output+0xcb0/0xcb0 [ 36.789120] [<000000009015fc46>] ? nf_hook_slow+0x62/0x1f0 [ 36.794834] [<0000000062b6bde2>] ? ip_fragment.constprop.0+0x210/0x210 [ 36.801597] [<0000000046088d3f>] ? check_preemption_disabled+0x3c/0x200 [ 36.808426] [<0000000025bf2e8f>] ? raw_sendmsg+0x1929/0x23e0 [ 36.814292] [<000000001235560a>] raw_sendmsg+0x1c5c/0x23e0 [ 36.820000] [<000000001ec32d6e>] ? raw_sendmsg+0x1851/0x23e0 [ 36.825905] [<00000000d8179edf>] ? avc_has_perm+0x164/0x3a0 [ 36.831689] [<0000000010130d64>] ? compat_raw_setsockopt+0xd0/0xd0 [ 36.838093] [<0000000020c5adaa>] ? __lock_acquire+0x5e5/0x4350 [ 36.844136] [<0000000099137b40>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 36.850892] [<0000000046088d3f>] ? check_preemption_disabled+0x3c/0x200 [ 36.857725] [<00000000411e23ab>] ? trace_hardirqs_on_caller+0x4f2/0x5a0 [ 36.864567] [<000000005eea427e>] ? ip4_datagram_release_cb+0x970/0x970 [ 36.871338] [<000000006fa8a58b>] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 36.878882] [<0000000099137b40>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 36.886602] [<0000000046088d3f>] ? check_preemption_disabled+0x3c/0x200 [ 36.894944] [<0000000046088d3f>] ? check_preemption_disabled+0x3c/0x200 [ 36.901792] [<0000000046088d3f>] ? check_preemption_disabled+0x3c/0x200 [ 36.908639] [<00000000ab61db5e>] ? inet_sendmsg+0x143/0x4d0 [ 36.914435] [<00000000c5ef49bb>] inet_sendmsg+0x202/0x4d0 [ 36.920074] [<0000000061f80b90>] ? inet_sendmsg+0x76/0x4d0 [ 36.925774] [<00000000c20bad6f>] ? inet_recvmsg+0x4d0/0x4d0 [ 36.931665] [<00000000d881e55c>] sock_sendmsg+0xbe/0x110 [ 36.937220] [<0000000016773a78>] sock_write_iter+0x235/0x3d0 [ 36.943091] [<00000000c27633d5>] ? sock_sendmsg+0x110/0x110 [ 36.948898] [<0000000065a1a77a>] ? iov_iter_init+0xaf/0x1d0 [ 36.954698] [<0000000033a255e3>] __vfs_write+0x3c1/0x560 [ 36.960325] [<00000000804b1647>] ? bpf_fd_pass+0x270/0x270 [ 36.966020] [<000000002259f73e>] ? __vfs_read+0x550/0x550 [ 36.971628] [<00000000a9b176ba>] ? trace_hardirqs_on+0xd/0x10 [ 36.977587] [<000000006968feea>] ? selinux_file_permission+0x85/0x470 [ 36.984248] [<00000000a5e1af40>] ? security_file_permission+0x8f/0x1f0 [ 36.990989] [<0000000035d74625>] ? rw_verify_area+0xea/0x2b0 [ 36.996883] [<00000000beff5a4c>] vfs_write+0x185/0x520 [ 37.002240] [<00000000ec80668c>] SyS_write+0x121/0x270 [ 37.007600] [<000000009529c8aa>] ? SyS_read+0x270/0x270 [ 37.013065] [<00000000ed7d111c>] ? do_sys