FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 ============================= WARNING: suspicious RCU usage CPU: 0 PID: 11596 Comm: syz-executor.2 Not tainted 4.14.131 #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: 4.14.131 #25 Not tainted __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10f/0x159 lib/fault-inject.c:149 should_failslab+0xdb/0x130 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3297 [inline] kmem_cache_alloc_node+0x287/0x780 mm/slab.c:3640 ----------------------------- __alloc_skb+0x9c/0x500 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:980 [inline] nlmsg_new include/net/netlink.h:511 [inline] netlink_ack+0x21c/0x9a0 net/netlink/af_netlink.c:2359 net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage! netlink_rcv_skb+0x2fc/0x3c0 net/netlink/af_netlink.c:2438 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4297 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x45d/0x780 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x7c4/0xc60 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xce/0x110 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062 __sys_sendmsg+0xb9/0x140 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2103 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007fa8de4a8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa8de4a8c90 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000020000980 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa8de4a96d4 R13: 00000000004c723c R14: 00000000004dc698 R15: 0000000000000005 other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by syz-executor.1/11599: #0: (cb_lock){++++}, at: [] genl_rcv+0x1a/0x40 net/netlink/genetlink.c:635 #1: (genl_mutex){+.+.}, at: [] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [] genl_rcv_msg+0x119/0x150 net/netlink/genetlink.c:623 stack backtrace: CPU: 1 PID: 11599 Comm: syz-executor.1 Not tainted 4.14.131 #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 lockdep_rcu_suspicious+0x153/0x15d kernel/locking/lockdep.c:4662 tipc_bearer_find+0x20a/0x300 net/tipc/bearer.c:177 tipc_nl_compat_link_set+0x433/0xbf0 net/tipc/netlink_compat.c:786 __tipc_nl_compat_doit net/tipc/netlink_compat.c:304 [inline] tipc_nl_compat_doit+0x16b/0x510 net/tipc/netlink_compat.c:351 tipc_nl_compat_handle net/tipc/netlink_compat.c:1183 [inline] tipc_nl_compat_recv+0x9b8/0xaf0 net/tipc/netlink_compat.c:1265 genl_family_rcv_msg+0x614/0xc30 net/netlink/genetlink.c:600 genl_rcv_msg+0xb4/0x150 net/netlink/genetlink.c:625 netlink_rcv_skb+0x14f/0x3c0 net/netlink/af_netlink.c:2432 genl_rcv+0x29/0x40 net/netlink/genetlink.c:636 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x45d/0x780 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x7c4/0xc60 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xce/0x110 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062 __sys_sendmsg+0xb9/0x140 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2103 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007fa638eecc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa638eed6d4 R13: 00000000004c6f1d R14: 00000000004dc278 R15: 00000000ffffffff net_ratelimit: 21 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 11619 Comm: syz-executor.2 Not tainted 4.14.131 #25 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0x10f/0x159 lib/fault-inject.c:149 should_failslab+0xdb/0x130 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc_node mm/slab.c:3297 [inline] kmem_cache_alloc_node_trace+0x280/0x770 mm/slab.c:3659 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x3d/0x80 mm/slab.c:3696 __kmalloc_reserve.isra.0+0x40/0xe0 net/core/skbuff.c:137 __alloc_skb+0xcf/0x500 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:980 [inline] nlmsg_new include/net/netlink.h:511 [inline] netlink_ack+0x21c/0x9a0 net/netlink/af_netlink.c:2359 netlink_rcv_skb+0x2fc/0x3c0 net/netlink/af_netlink.c:2438 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4297 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x45d/0x780 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x7c4/0xc60 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xce/0x110 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062 __sys_sendmsg+0xb9/0x140 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2103 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459519 RSP: 002b:00007fa8de4a8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa8de4a8c90 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000020000980 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa8de4a96d4 R13: 00000000004c723c R14: 00000000004dc698 R15: 0000000000000005 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 bond0: option active_slave: mode dependency failed, not supported in mode balance-rr(0) audit: type=1400 audit(1561729879.278:93): avc: denied { ioctl } for pid=11644 comm="syz-executor.4" path="socket:[41879]" dev="sockfs" ino=41879 ioctlcmd=0x8995 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 bond0: option active_slave: mode dependency failed, not supported in mode balance-rr(0) protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 audit: type=1400 audit(1561729879.888:94): avc: denied { accept } for pid=11693 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 Unknown ioctl 21550 Bluetooth: hci0 sending frame failed (-49) netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1400 audit(1561729880.798:95): avc: denied { associate } for pid=11778 comm="syz-executor.4" name="file0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1 overlayfs: fs on '.' does not support file handles, falling back to index=off. overlayfs: filesystem on './file0' not supported as upperdir overlayfs: fs on '.' does not support file handles, falling back to index=off. overlayfs: maximum fs stacking depth exceeded audit: type=1400 audit(1561729881.288:96): avc: denied { map } for pid=11789 comm="syz-executor.1" path=2F726F6F742F73797A6B616C6C65722D746573746469723734363933323737322F73797A6B616C6C65722E53554658685A2F3136312F7374617409C0D2FEBCF9DF2DEAC8C177FF171248E91193513049F831550D6F7DE66CF617732743E397D31B0512A5608AAFF01E7952340CD6FD dev="sda1" ino=16722 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 Bluetooth: hci0 command 0x1003 tx timeout Bluetooth: hci0 sending frame failed (-49) Bluetooth: hci1 command 0x1003 tx timeout Bluetooth: hci1 sending frame failed (-49) net_ratelimit: 20 callbacks suppressed protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 Bluetooth: hci0 command 0x1001 tx timeout Bluetooth: hci0 sending frame failed (-49) protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 Bluetooth: hci1 command 0x1001 tx timeout Bluetooth: hci1 sending frame failed (-49) Bluetooth: hci0 command 0x1009 tx timeout Bluetooth: hci1 command 0x1009 tx timeout