Warning: Permanently added '10.128.0.170' (ECDSA) to the list of known hosts. 2019/06/21 15:39:22 parsed 1 programs 2019/06/21 15:39:24 executed programs: 0 syzkaller login: [ 58.031742] audit: type=1400 audit(1561131564.787:5): avc: denied { associate } for pid=2101 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 [ 58.052386] [ 58.054062] =============================== [ 58.058468] [ INFO: suspicious RCU usage. ] [ 58.062778] 4.9.182+ #2 Not tainted [ 58.066419] ------------------------------- [ 58.070744] ./include/linux/inetdevice.h:205 suspicious rcu_dereference_check() usage! [ 58.078802] [ 58.078802] other info that might help us debug this: [ 58.078802] [ 58.086946] [ 58.086946] rcu_scheduler_active = 2, debug_locks = 0 [ 58.093590] 4 locks held by syz-executor.0/2250: [ 58.098348] #0: (rcu_read_lock_bh){......}, at: [<0000000065bdcef8>] ip_finish_output2+0x20b/0x1280 [ 58.108249] #1: (rcu_read_lock_bh){......}, at: [<00000000e86cb9cb>] __dev_queue_xmit+0x1d4/0x1bd0 [ 58.118014] #2: (_xmit_TUNNEL6#2){+.....}, at: [<0000000056244492>] __dev_queue_xmit+0x1116/0x1bd0 [ 58.127893] #3: (slock-AF_INET){+.-...}, at: [<00000000ddad19e3>] __icmp_send+0x48b/0x1420 [ 58.136962] [ 58.136962] stack backtrace: [ 58.141450] CPU: 0 PID: 2250 Comm: syz-executor.0 Not tainted 4.9.182+ #2 [ 58.148355] ffff8801caa26dd8 ffffffff81b57e21 ffff8801ce1e5780 0000000000000000 [ 58.156342] 0000000000000002 00000000000000cd ffff8801caa317c0 ffff8801caa26e08 [ 58.164335] ffffffff81404f19 ffff8801ce1e57d8 ffff8801caa26f28 ffff8801d9d58000 [ 58.172331] Call Trace: [ 58.174903] [<000000000eec963a>] dump_stack+0xc1/0x120 [ 58.180344] [<000000009b8217db>] lockdep_rcu_suspicious.cold+0x10a/0x149 [ 58.187272] [<00000000fa24e860>] fib_compute_spec_dst+0x6c4/0xcc0 [ 58.193574] [<00000000d9935b01>] ? fib_unmerge+0x4c0/0x4c0 [ 58.199262] [<00000000a9a8cec1>] ? trace_hardirqs_on+0x10/0x10 [ 58.205300] [<00000000e1ec34d2>] ? __lock_acquire+0x5e5/0x4350 [ 58.211338] [<00000000cf6a67a4>] __ip_options_echo+0x4be/0x13e0 [ 58.217467] [<00000000e38839d5>] __icmp_send+0x648/0x1420 [ 58.223067] [<000000002f17371f>] ? __icmp_send+0xc07/0x1420 [ 58.228845] [<00000000e1ec34d2>] ? __lock_acquire+0x5e5/0x4350 [ 58.234882] [<000000002247a4df>] ? icmpv4_xrlim_allow.isra.0+0x2d0/0x2d0 [ 58.241786] [<00000000a9a8cec1>] ? trace_hardirqs_on+0x10/0x10 [ 58.247821] [<00000000bb9ecfd9>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 58.254552] [<0000000078f01c2f>] ? __ip_options_compile+0x668/0x13c0 [ 58.261110] [<00000000e0bc8093>] ? check_preemption_disabled+0x3c/0x200 [ 58.267928] [<000000009cbeee96>] ? ipv4_link_failure+0x410/0x850 [ 58.274135] [<000000000fd96ca8>] ipv4_link_failure+0x460/0x850 [ 58.280172] [<0000000059bd00dc>] ? ipv4_link_failure+0x32b/0x850 [ 58.286379] [<00000000165362f7>] ? rt_dst_alloc+0x450/0x450 [ 58.292154] [<00000000165362f7>] ? rt_dst_alloc+0x450/0x450 [ 58.297930] [<000000005af4a023>] vti6_tnl_xmit+0xb08/0x17f0 [ 58.303702] [<0000000067bf2577>] ? vti6_dellink+0x270/0x270 [ 58.309481] [<0000000040ee3762>] dev_hard_start_xmit+0x195/0x8b0 [ 58.315689] [<00000000f694c01c>] __dev_queue_xmit+0x11a3/0x1bd0 [ 58.321808] [<00000000e86cb9cb>] ? __dev_queue_xmit+0x1d4/0x1bd0 [ 58.328017] [<000000009528aa73>] ? __local_bh_enable_ip+0x6a/0xe0 [ 58.334311] [<000000008bc6d2b4>] ? netdev_pick_tx+0x300/0x300 [ 58.340258] [<0000000080f0c30c>] ? __neigh_create+0x96e/0x1b30 [ 58.346291] [<000000005af3f77c>] dev_queue_xmit+0x18/0x20 [ 58.351893] [<0000000099a3afc7>] neigh_direct_output+0x16/0x20 [ 58.357936] [<00000000742acba6>] ip_finish_output2+0x6a2/0x1280 [ 58.364059] [<0000000065bdcef8>] ? ip_finish_output2+0x20b/0x1280 [ 58.370353] [<000000000deff281>] ? rcu_read_lock_held+0x9e/0xc0 [ 58.376477] [<0000000002d83dd5>] ? nf_iterate+0x19e/0x310 [ 58.382081] [<0000000031a2e6f4>] ? ip_send_check+0xb0/0xb0 [ 58.387770] [<00000000bb9ecfd9>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 58.394500] [<00000000453dffcf>] ? nf_hook_slow+0x12f/0x1f0 [ 58.400277] [<00000000d8a90693>] ip_finish_output+0x3c4/0xce0 [ 58.406226] [<00000000369e0d0b>] ip_output+0x1ec/0x5b0 [ 58.411567] [<00000000f4d2e6f4>] ? ip_output+0x287/0x5b0 [ 58.417083] [<000000006539fb5b>] ? ip_mc_output+0xcb0/0xcb0 [ 58.422860] [<00000000464546af>] ? nf_hook_slow+0x72/0x1f0 [ 58.428545] [<000000004400dbdf>] ? ip_fragment.constprop.0+0x210/0x210 [ 58.435288] [<00000000e0bc8093>] ? check_preemption_disabled+0x3c/0x200 [ 58.442106] [<00000000cb53dfd7>] ? raw_sendmsg+0x1929/0x23e0 [ 58.447963] [<000000002fb6d1db>] raw_sendmsg+0x1c5c/0x23e0 [ 58.453648] [<0000000034a4f60e>] ? raw_sendmsg+0x1851/0x23e0 [ 58.459508] [<00000000fe345237>] ? avc_has_perm+0x164/0x3a0 [ 58.465285] [<000000004a02b834>] ? compat_raw_setsockopt+0xd0/0xd0 [ 58.471669] [<00000000e1ec34d2>] ? __lock_acquire+0x5e5/0x4350 [ 58.477702] [<00000000bb9ecfd9>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 58.484431] [<00000000e0bc8093>] ? check_preemption_disabled+0x3c/0x200 [ 58.491247] [<000000008d983962>] ? trace_hardirqs_on_caller+0x4c2/0x5a0 [ 58.498062] [<0000000001ad3d37>] ? ip4_datagram_release_cb+0x970/0x970 [ 58.504790] [<000000005d98a9bc>] ? selinux_msg_queue_alloc_security+0x2e0/0x2e0 [ 58.512300] [<00000000bb9ecfd9>] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 58.519045] [<00000000e0bc8093>] ? check_preemption_disabled+0x3c/0x200 [ 58.525861] [<00000000e0bc8093>] ? check_preemption_disabled+0x3c/0x200 [ 58.532726] [<00000000e0bc8093>] ? check_preemption_disabled+0x3c/0x200 [ 58.539543] [<0000000045501730>] ? inet_sendmsg+0x143/0x4d0 [ 58.545314] [<000000005ac535d3>] inet_sendmsg+0x202/0x4d0 [ 58.550916] [<00000000cf93ae13>] ? inet_sendmsg+0x76/0x4d0 [ 58.556601] [<000000007140a065>] ? inet_recvmsg+0x4d0/0x4d0 [ 58.562373] [<00000000c5e40925>] sock_sendmsg+0xbe/0x110 [ 58.567884] [<00000000219f040c>] sock_write_iter+0x235/0x3d0 [ 58.573744] [<000000001143ba21>] ? sock_sendmsg+0x110/0x110 [ 58.579517] [<00000000b2e2f2a2>] ? iov_iter_init+0xaf/0x1d0 [ 58.585307] [<0000000011ef61eb>] __vfs_write+0x3c1/0x560 [ 58.590822] [<000000000e22adf6>] ? bpf_fd_pass+0x270/0x270 [ 58.596507] [<00000000084a3005>] ? __vfs_read+0x550/0x550 [ 58.602122] [<00000000be3e9b24>] ? trace_hardirqs_on+0xd/0x10 [ 58.608068] [<00000000aaa06a5b>] ? selinux_file_permission+0x85/0x470 [ 58.614711] [<00000000eba2461c>] ? security_file_permission+0x8f/0x1f0 [ 58.621441] [<000000000dbc2591>] ? rw_verify_area+0xea/0x2b0 [ 58.627301] [<000000002e56c80b>] vfs_write+0x185/0x520 [ 58.632639] [<00000000d2b7f49e>] SyS_write+0x121/0x270 [ 58.637977] [<00000000049f7310>] ? SyS_read+0x270/0x270 [ 58.643408] [<0000000095422715>] ? do_syscall_64+0x4a/0x5c0 [ 58.649179] [<00000000049f7310>] ? SyS_read+0x270/0x270 [ 58.