============================= WARNING: suspicious RCU usage 4.16.0-rc1+ #309 Not tainted ----------------------------- ./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-executor5/10076: #0: (rcu_read_lock){....}, at: [<00000000cbb4e012>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218 stack backtrace: CPU: 0 PID: 10076 Comm: syz-executor5 Not tainted 4.16.0-rc1+ #309 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:6093 __might_sleep+0x95/0x190 kernel/sched/core.c:6081 slab_pre_alloc_hook mm/slab.h:420 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc+0x2a2/0x760 mm/slab.c:3539 xt_cgroup: invalid path, errno=-2 rds_tcp_conn_alloc+0xa7/0x4e0 net/rds/tcp.c:296 __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 SYSC_sendto+0x361/0x5c0 net/socket.c:1747 SyS_sendto+0x40/0x50 net/socket.c:1715 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b RIP: 0033:0x453a59 RSP: 002b:00007f8c804dcc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f8c804dd6d4 RCX: 0000000000453a59 RDX: 000000000000ff8c RSI: 0000000020e45000 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 00000000206abff0 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000 BUG: sleeping function called from invalid context at mm/slab.h:420 in_atomic(): 1, irqs_disabled(): 0, pid: 10076, name: syz-executor5 1 lock held by syz-executor5/10076: #0: (rcu_read_lock){....}, at: [<00000000cbb4e012>] __rds_conn_create+0xe46/0x1b50 net/rds/connection.c:218 audit: type=1400 audit(1518444288.358:66): avc: denied { getopt } for pid=10104 comm="syz-executor7" 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 CPU: 0 PID: 10076 Comm: syz-executor5 Not tainted 4.16.0-rc1+ #309 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:6128 xt_cgroup: invalid path, errno=-2 __might_sleep+0x95/0x190 kernel/sched/core.c:6081 slab_pre_alloc_hook mm/slab.h:420 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc+0x2a2/0x760 mm/slab.c:3539 rds_tcp_conn_alloc+0xa7/0x4e0 net/rds/tcp.c:296 __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 SYSC_sendto+0x361/0x5c0 net/socket.c:1747 SyS_sendto+0x40/0x50 net/socket.c:1715 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b RIP: 0033:0x453a59 RSP: 002b:00007f8c804dcc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f8c804dd6d4 RCX: 0000000000453a59 RDX: 000000000000ff8c RSI: 0000000020e45000 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 00000000206abff0 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000 binder: send failed reply for transaction 37 to 10125:10130 xt_CT: No such timeout policy "syz0" binder: release 10125:10130 transaction 39 out, still active xt_CT: No such timeout policy "syz0" binder: send failed reply for transaction 39, target dead audit: type=1326 audit(1518444289.074:67): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=10185 comm="syz-executor2" exe="/root/syz-executor2" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0 audit: type=1326 audit(1518444289.139:68): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=10185 comm="syz-executor2" exe="/root/syz-executor2" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453a59 code=0x0 netlink: 'syz-executor4': attribute type 1 has an invalid length. sctp: [Deprecated]: syz-executor0 (pid 10286) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead netlink: 'syz-executor4': attribute type 1 has an invalid length. sctp: [Deprecated]: syz-executor0 (pid 10309) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready binder: 10427:10428 Release 1 refcount change on invalid ref 3 ret -22 binder: 10427:10428 BC_DEAD_BINDER_DONE 0000000000000000 not found binder: 10427:10428 ERROR: BC_REGISTER_LOOPER called without request binder: 10428 RLIMIT_NICE not set binder_alloc: 10427: binder_alloc_buf, no vma binder: 10427:10432 transaction failed 29189/-3, size -148-0 line 2957 binder: BINDER_SET_CONTEXT_MGR already set xt_connbytes: Forcing CT accounting to be enabled binder: 10427:10437 ioctl 40046207 0 returned -16 binder: 10427:10432 Release 1 refcount change on invalid ref 3 ret -22 binder: 10427:10432 BC_DEAD_BINDER_DONE 0000000000000000 not found binder: 10427:10432 ERROR: BC_REGISTER_LOOPER called without request binder: 10432 RLIMIT_NICE not set binder_alloc: 10427: binder_alloc_buf, no vma binder: 10427:10447 transaction failed 29189/-3, size -148-0 line 2957 irq bypass consumer (token 00000000d33df409) registration fails: -16 kernel msg: ebtables bug: please report to author: Wrong len argument kernel msg: ebtables bug: please report to author: Wrong len argument encrypted_key: insufficient parameters specified encrypted_key: insufficient parameters specified device eql entered promiscuous mode audit: type=1400 audit(1518444291.058:69): avc: denied { relabelto } for pid=10574 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:udev_var_run_t:s0 tclass=packet permissive=1 audit: type=1400 audit(1518444291.083:70): avc: denied { send } for pid=10574 comm="syz-executor1" saddr=fe80::1:b daddr=fe80:: netif=tunl0 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:udev_var_run_t:s0 tclass=packet permissive=1 audit: type=1400 audit(1518444291.084:71): avc: denied { send } for pid=10574 comm="syz-executor1" saddr=fe80::1:b daddr=fe80::1:b netif=lo scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:udev_var_run_t:s0 tclass=packet permissive=1 netlink: 'syz-executor4': attribute type 18 has an invalid length. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=35 sclass=netlink_route_socket pig=10694 comm=syz-executor7 audit: type=1400 audit(1518444291.540:72): avc: denied { dyntransition } for pid=10689 comm="syz-executor3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0,c1 tclass=process permissive=1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=35 sclass=netlink_route_socket pig=10701 comm=syz-executor7 netlink: 'syz-executor4': attribute type 18 has an invalid length. TCP: request_sock_TCPv6: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. audit: type=1400 audit(1518444291.905:73): avc: denied { map } for pid=10747 comm="syz-executor7" path="pipe:[30355]" dev="pipefs" ino=30355 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=fifo_file permissive=1 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl sctp: [Deprecated]: syz-executor4 (pid 10921) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor4 (pid 10921) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead tc_ctl_action: received NO action attribs tc_ctl_action: received NO action attribs binder: 11365:11367 DecRefs 0 refcount change on invalid ref 0 ret -22 binder: 11365:11370 DecRefs 0 refcount change on invalid ref 0 ret -22 xt_l2tp: invalid flags combination: 0 xt_l2tp: invalid flags combination: 0 ion_ioctl: ioctl validate failed hrtimer: interrupt took 26261 ns x86/PAT: syz-executor7:11500 map pfn RAM range req write-combining for [mem 0x1addc0000-0x1addc3fff], got write-back x86/PAT: syz-executor7:11500 map pfn RAM range req write-combining for [mem 0x1c3410000-0x1c3413fff], got write-back ip_tables: iptables: counters copy to user failed while replacing table ip_tables: iptables: counters copy to user failed while replacing table audit: type=1400 audit(1518444295.169:74): avc: denied { getattr } for pid=11539 comm="syz-executor3" name="NETLINK" dev="sockfs" ino=32662 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 binder: 11565:11578 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 11565:11578 unknown command 0 binder: 11565:11578 ioctl c0306201 2000a000 returned -22 binder: 11565:11587 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 11565:11587 unknown command 0 binder: 11565:11587 ioctl c0306201 2000a000 returned -22 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready audit: type=1400 audit(1518444295.662:75): avc: denied { map } for pid=11651 comm="syz-executor7" path="/dev/dsp" dev="devtmpfs" ino=99 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file permissive=1 xt_HL: increment/decrement does not make sense with value 0 netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. xt_HL: increment/decrement does not make sense with value 0 netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. audit: type=1400 audit(1518444297.796:76): avc: denied { net_broadcast } for pid=11776 comm="syz-executor0" capability=11 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 ip6t_REJECT: ECHOREPLY is not supported.