WARNING: suspicious RCU usage in should

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	WARNING: suspicious RCU usage in should_fail (2) mm	4	1	2710d	2710d	0/29	closed as invalid on 2018/02/12 11:24
upstream	WARNING: suspicious RCU usage in should_fail (4) rds	4	1	2707d	2707d	0/29	closed as invalid on 2018/02/15 08:58
upstream	WARNING: suspicious RCU usage in should_fail (8) net	4	1	2639d	2639d	0/29	closed as invalid on 2018/04/24 13:49
upstream	WARNING: suspicious RCU usage in should_fail rds	4	8	2710d	2711d	0/29	closed as invalid on 2018/02/12 10:57
upstream	WARNING: suspicious RCU usage in should_fail (6) rds	4	1	2705d	2705d	0/29	closed as invalid on 2018/02/17 12:58
upstream	WARNING: suspicious RCU usage in should_fail (3) mm	4	1	2709d	2709d	0/29	closed as invalid on 2018/02/12 19:58
upstream	WARNING: suspicious RCU usage in should_fail (5) mm	4	1	2705d	2705d	0/29	closed as invalid on 2018/02/17 10:58

FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 ============================= CPU: 1 PID: 16163 Comm: syz-executor6 Not tainted 4.16.0-rc2+ #320 WARNING: suspicious RCU usage 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+0x194/0x257 lib/dump_stack.c:53 4.16.0-rc2+ #320 Not tainted fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 ----------------------------- ./include/linux/rcupdate.h:302 Illegal context switch in RCU read-side critical section! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor7/16159: #0: ( should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc_trace+0x4b/0x740 mm/slab.c:3605 rcu_read_lock kmalloc include/linux/slab.h:512 [inline] kzalloc include/linux/slab.h:701 [inline] __reuseport_alloc net/core/sock_reuseport.c:21 [inline] reuseport_alloc+0x163/0x390 net/core/sock_reuseport.c:48 ){....} , at: [<000000000c3488ed>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218 stack backtrace: inet_reuseport_add_sock net/ipv4/inet_hashtables.c:573 [inline] __inet_hash+0xaf8/0x10d0 net/ipv4/inet_hashtables.c:591 inet6_hash+0x61/0x90 net/ipv6/inet6_hashtables.c:336 inet_csk_listen_start+0x258/0x310 net/ipv4/inet_connection_sock.c:884 inet_listen+0x19a/0x440 net/ipv4/af_inet.c:229 SYSC_listen net/socket.c:1503 [inline] SyS_listen+0x1aa/0x350 net/socket.c:1489 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453d69 RSP: 002b:00007fb3a3992c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000032 RAX: ffffffffffffffda RBX: 00007fb3a39936d4 RCX: 0000000000453d69 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014 R13: 00000000000003c2 R14: 00000000006f5ad0 R15: 0000000000000001 CPU: 0 PID: 16159 Comm: syz-executor7 Not tainted 4.16.0-rc2+ #320 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+0x194/0x257 lib/dump_stack.c:53 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4592 rcu_preempt_sleep_check include/linux/rcupdate.h:301 [inline] ___might_sleep+0x385/0x470 kernel/sched/core.c:6098 __might_sleep+0x95/0x190 kernel/sched/core.c:6086 slab_pre_alloc_hook mm/slab.h:420 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc_trace+0x299/0x740 mm/slab.c:3605 kmalloc include/linux/slab.h:512 [inline] kzalloc include/linux/slab.h:701 [inline] rds_loop_conn_alloc+0xc8/0x380 net/rds/loop.c:126 __rds_conn_create+0x112f/0x1b50 net/rds/connection.c:227 rds_conn_create_outgoing+0x3f/0x50 net/rds/connection.c:309 rds_sendmsg+0xda3/0x2390 net/rds/send.c:1126 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2046 __sys_sendmsg+0xe5/0x210 net/socket.c:2080 SYSC_sendmsg net/socket.c:2091 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2087 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453d69 RSP: 002b:00007f51b1b09c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f51b1b0a6d4 RCX: 0000000000453d69 RDX: 0000000000000000 RSI: 000000002000dfc8 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b5 R14: 00000000006f7198 R15: 0000000000000000 BUG: sleeping function called from invalid context at mm/slab.h:420 in_atomic(): 1, irqs_disabled(): 0, pid: 16159, name: syz-executor7 1 lock held by syz-executor7/16159: #0: (rcu_read_lock){....}, at: [<000000000c3488ed>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218 CPU: 0 PID: 16159 Comm: syz-executor7 Not tainted 4.16.0-rc2+ #320 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+0x194/0x257 lib/dump_stack.c:53 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6133 __might_sleep+0x95/0x190 kernel/sched/core.c:6086 slab_pre_alloc_hook mm/slab.h:420 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc_trace+0x299/0x740 mm/slab.c:3605 kmalloc include/linux/slab.h:512 [inline] kzalloc include/linux/slab.h:701 [inline] rds_loop_conn_alloc+0xc8/0x380 net/rds/loop.c:126 __rds_conn_create+0x112f/0x1b50 net/rds/connection.c:227 rds_conn_create_outgoing+0x3f/0x50 net/rds/connection.c:309 rds_sendmsg+0xda3/0x2390 net/rds/send.c:1126 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2046 __sys_sendmsg+0xe5/0x210 net/socket.c:2080 SYSC_sendmsg net/socket.c:2091 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2087 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453d69 RSP: 002b:00007f51b1b09c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f51b1b0a6d4 RCX: 0000000000453d69 RDX: 0000000000000000 RSI: 000000002000dfc8 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b5 R14: 00000000006f7198 R15: 0000000000000000 DNAT: multiple ranges no longer supported DNAT: multiple ranges no longer supported QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 16617 Comm: syz-executor0 Tainted: G W 4.16.0-rc2+ #320 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+0x194/0x257 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3539 dst_alloc+0x11f/0x1a0 net/core/dst.c:104 rt_dst_alloc+0xe9/0x520 net/ipv4/route.c:1497 __mkroute_output net/ipv4/route.c:2239 [inline] ip_route_output_key_hash_rcu+0xa59/0x2f00 net/ipv4/route.c:2467 ip_route_output_key_hash+0x20b/0x370 net/ipv4/route.c:2296 __ip_route_output_key include/net/route.h:125 [inline] __xfrm4_dst_lookup.isra.5+0x27b/0x390 net/ipv4/xfrm4_policy.c:39 xfrm4_get_saddr+0xab/0x160 net/ipv4/xfrm4_policy.c:63 xfrm_get_saddr net/xfrm/xfrm_policy.c:1355 [inline] xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1384 [inline] xfrm_tmpl_resolve+0x57b/0xc40 net/xfrm/xfrm_policy.c:1437 xfrm_resolve_and_create_bundle+0x184/0x28d0 net/xfrm/xfrm_policy.c:1830 xfrm_lookup+0xfcb/0x25c0 net/xfrm/xfrm_policy.c:2160 xfrm_lookup_route+0x39/0x1a0 net/xfrm/xfrm_policy.c:2280 ip6_dst_lookup_flow+0x1c2/0x270 net/ipv6/ip6_output.c:1099 ip6_datagram_dst_update+0x734/0x1480 net/ipv6/datagram.c:91 __ip6_datagram_connect+0x533/0x12d0 net/ipv6/datagram.c:251 ip6_datagram_connect+0x2f/0x50 net/ipv6/datagram.c:273 ip6_datagram_connect_v6_only+0x5e/0x80 net/ipv6/datagram.c:285 inet_dgram_connect+0x16b/0x1f0 net/ipv4/af_inet.c:542 SYSC_connect+0x213/0x4a0 net/socket.c:1639 SyS_connect+0x24/0x30 net/socket.c:1620 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453d69 RSP: 002b:00007f1b05009c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f1b0500a6d4 RCX: 0000000000453d69 RDX: 000000000000001c RSI: 0000000020cc2000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000015 R13: 000000000000005a R14: 00000000006f0910 R15: 0000000000000000 audit: type=1400 audit(1519039592.825:66): avc: denied { map } for pid=16923 comm="syz-executor2" path="/dev/cuse" dev="devtmpfs" ino=152 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:tty_device_t:s0 tclass=chr_file permissive=1 audit: type=1400 audit(1519039593.928:67): avc: denied { create } for pid=17192 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_connector_socket permissive=1