============================= WARNING: suspicious RCU usage 4.15.0-rc6-next-20180102+ #86 Not tainted ----------------------------- net/netfilter/ipset/ip_set_core.c:2057 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 3 locks held by kworker/u4:4/736: #0: ((wq_completion)"%s""netns"){+.+.}, at: [<00000000fd03dad6>] process_one_work+0x71f/0x14a0 kernel/workqueue.c:2083 #1: (net_cleanup_work){+.+.}, at: [<000000008af04eef>] process_one_work+0x757/0x14a0 kernel/workqueue.c:2087 #2: (net_mutex){+.+.}, at: [<000000002d0e3c45>] cleanup_net+0x139/0x8b0 net/core/net_namespace.c:450 stack backtrace: CPU: 0 PID: 736 Comm: kworker/u4:4 Not tainted 4.15.0-rc6-next-20180102+ #86 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x137/0x198 lib/dump_stack.c:53 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4585 ip_set_net_exit+0x2c6/0x480 net/netfilter/ipset/ip_set_core.c:2057 ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:142 cleanup_net+0x3f3/0x8b0 net/core/net_namespace.c:484 process_one_work+0x801/0x14a0 kernel/workqueue.c:2112 worker_thread+0xe0/0x1010 kernel/workqueue.c:2246 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:524 QAT: Invalid ioctl QAT: Invalid ioctl kauditd_printk_skb: 114 callbacks suppressed audit: type=1326 audit(1514912966.992:1206): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=15344 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000 audit: type=1326 audit(1514912966.992:1207): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=15344 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000 audit: type=1326 audit(1514912966.992:1208): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=15344 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=2 compat=0 ip=0x40ce01 code=0x7ffc0000 audit: type=1326 audit(1514912966.992:1209): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=15344 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000 audit: type=1326 audit(1514912966.992:1210): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=15344 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000 audit: type=1326 audit(1514912966.992:1211): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=15344 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=55 compat=0 ip=0x452ac9 code=0x7ffc0000 audit: type=1326 audit(1514912966.992:1212): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=15344 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000 audit: type=1326 audit(1514912966.992:1213): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=15344 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452ac9 code=0x7ffc0000 dccp_invalid_packet: P.Data Offset(66) too large audit: type=1326 audit(1514912966.999:1214): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=15344 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=54 compat=0 ip=0x452ac9 code=0x7ffc0000 dccp_invalid_packet: P.Data Offset(66) too large netlink: 14 bytes leftover after parsing attributes in process `syz-executor2'. openvswitch: netlink: Flow set message rejected, Key attribute missing. FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 0 PID: 15373 Comm: syz-executor3 Not tainted 4.15.0-rc6-next-20180102+ #86 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+0x137/0x198 lib/dump_stack.c:53 handle_userfault+0x744/0x1750 fs/userfaultfd.c:430 do_anonymous_page mm/memory.c:3171 [inline] handle_pte_fault mm/memory.c:3945 [inline] __handle_mm_fault+0x2fc5/0x3210 mm/memory.c:4071 handle_mm_fault+0x305/0x840 mm/memory.c:4108 __do_page_fault+0x59e/0xca0 arch/x86/mm/fault.c:1429 do_page_fault+0x78/0x490 arch/x86/mm/fault.c:1504 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1243 RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline] RIP: 0010:iov_iter_fault_in_readable+0x1a7/0x410 lib/iov_iter.c:421 RSP: 0018:ffff8801c1837a08 EFLAGS: 00010246 RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff821c64c1 RDX: 000000000000010c RSI: ffffc900042bb000 RDI: ffff8801c1837d30 RBP: ffff8801c1837ae8 R08: 0000000000000000 R09: 0000000000000003 R10: ffff8801c1837978 R11: 0000000000000001 R12: 1ffff10038306f44 R13: ffff8801c1837ac0 R14: 0000000000000000 R15: ffff8801c1837d28 generic_perform_write+0x195/0x4a0 mm/filemap.c:3128 __generic_file_write_iter+0x366/0x5b0 mm/filemap.c:3263 generic_file_write_iter+0x2f0/0x630 mm/filemap.c:3291 call_write_iter include/linux/fs.h:1775 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x550/0x740 fs/read_write.c:482 vfs_write+0x189/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xd4/0x1a0 fs/read_write.c:581 entry_SYSCALL_64_fastpath+0x23/0x9a RIP: 0033:0x452ac9 RSP: 002b:00007f9c232f7c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9 RDX: 000000000000001c RSI: 0000000020011fd2 RDI: 0000000000000014 RBP: 0000000000000300 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f28a0 R13: 00000000ffffffff R14: 00007f9c232f86d4 R15: 0000000000000000 netlink: 14 bytes leftover after parsing attributes in process `syz-executor2'. openvswitch: netlink: Flow set message rejected, Key attribute missing. netlink: 5 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor4'. sock: sock_set_timeout: `syz-executor0' (pid 15535) tries to set negative timeout sock: sock_set_timeout: `syz-executor0' (pid 15535) tries to set negative timeout binder: 15653:15654 ERROR: BC_REGISTER_LOOPER called without request binder: 15654 RLIMIT_NICE not set binder: 15654 RLIMIT_NICE not set binder: BINDER_SET_CONTEXT_MGR already set binder: 15653:15672 ERROR: BC_REGISTER_LOOPER called without request binder: 15672 RLIMIT_NICE not set binder: 15653:15654 ioctl 40046207 0 returned -16 binder: release 15653:15654 transaction 73 in, still active binder: send failed reply for transaction 73 to 15653:15672 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 device gre0 entered promiscuous mode openvswitch: netlink: Key type 246 is out of range max 29 openvswitch: netlink: Key type 246 is out of range max 29 device syz3 entered promiscuous mode netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. binder: 16053:16059 ioctl c0306201 20004000 returned -11 binder: BINDER_SET_CONTEXT_MGR already set binder: 16053:16059 ioctl 40046207 0 returned -16 device eql entered promiscuous mode sctp: [Deprecated]: syz-executor1 (pid 16091) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 9 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 9 bytes leftover after parsing attributes in process `syz-executor5'. QAT: Invalid ioctl