INFO: task syz-executor.4:6248 blocked for more than 143 seconds. Not tainted 5.14.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26848 pid: 6248 ppid: 5817 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0xaff/0x5910 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6078 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104 nfnl_lock net/netfilter/nfnetlink.c:93 [inline] nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2504 nfnetlink_rcv+0x143/0x340 net/netfilter/nfnetlink.c:654 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x704/0xbf0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:723 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2392 ___sys_sendmsg+0xd3/0x150 net/socket.c:2446 __sys_sendmsg+0xb2/0x140 net/socket.c:2475 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe7c8a350d9 RSP: 002b:00007fe7c7da7168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe7c8b54f80 RCX: 00007fe7c8a350d9 RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000000000003 RBP: 00007fe7c8a90ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffd17b8b2f R14: 00007fe7c7da7300 R15: 0000000000022000 INFO: task syz-executor.4:6250 blocked for more than 144 seconds. Not tainted 5.14.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28032 pid: 6250 ppid: 5817 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0xaff/0x5910 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6078 __mutex_lock_common kernel/locking/mutex.c:1036 [inline] __mutex_lock+0x7b6/0x10a0 kernel/locking/mutex.c:1104 nfnl_lock net/netfilter/nfnetlink.c:93 [inline] nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2504 nfnetlink_rcv+0x143/0x340 net/netfilter/nfnetlink.c:654 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x704/0xbf0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:723 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2392 ___sys_sendmsg+0xd3/0x150 net/socket.c:2446 __sys_sendmsg+0xb2/0x140 net/socket.c:2475 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe7c8a350d9 RSP: 002b:00007fe7c7d86168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe7c8b55050 RCX: 00007fe7c8a350d9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007fe7c8a90ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffd17b8b2f R14: 00007fe7c7d86300 R15: 0000000000022000 Showing all locks held in the system: 4 locks held by kworker/u4:5/255: #0: ffff88814011b138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88814011b138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline] #0: ffff88814011b138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88814011b138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff88814011b138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff88814011b138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2247 #1: ffffc9000178fdb8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2251 #2: ffffffff8c490810 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x97/0x990 net/core/net_namespace.c:557 #3: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: ip_set_net_exit+0x103/0x440 net/netfilter/ipset/ip_set_core.c:2343 1 lock held by khungtaskd/1635: #0: ffffffff8ad75440 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 3 locks held by kworker/0:3/3162: #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline] #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2247 #1: ffffc90002b27db8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2251 #2: ffffffff8c4a3188 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x9f/0x11a0 net/ipv6/addrconf.c:4031 2 locks held by getty/5139: #0: ffff888147a75098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900016062e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9e1/0xee0 drivers/tty/n_tty.c:2113 3 locks held by kworker/0:5/5481: #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2247 #1: ffffc9000177fdb8 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2251 #2: ffff88801cf123c0 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x58/0xb50 drivers/net/netdevsim/dev.c:757 2 locks held by kworker/0:6/5482: #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline] #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff888010866538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2247 #1: ffffc9000179fdb8 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2251 3 locks held by kworker/1:4/5924: #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2247 #1: ffffc90001befdb8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2251 #2: ffffffff8c4a3188 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x5/0x50 net/core/link_watch.c:250 3 locks held by kworker/1:8/5992: #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline] #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff8880272ccd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x771/0x13d0 kernel/workqueue.c:2247 #1: ffffc9000166fdb8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13d0 kernel/workqueue.c:2251 #2: ffffffff8c4a3188 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0x9f/0x11a0 net/ipv6/addrconf.c:4031 3 locks held by syz-executor.0/6239: 1 lock held by syz-executor.4/6248: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.4/6250: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.2/6586: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.2/6587: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.3/6809: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.3/6810: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.1/6842: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.1/6843: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.5/6846: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.5/6849: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.0/6852: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.0/6854: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.4/6853: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.4/6855: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.2/6871: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.2/6872: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.3/6894: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.3/6895: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.5/6910: #0: ffffffff8c4a3188 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8c4a3188 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5571 1 lock held by syz-executor.0/6914: #0: ffffffff8c4a3188 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8c4a3188 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5571 1 lock held by syz-executor.4/6915: #0: ffffffff8c4a3188 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8c4a3188 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x2d2/0x8d0 net/core/rtnetlink.c:5571 8 locks held by syz-executor.2/6940: #0: ffff88802867a460 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0xf4/0x1d0 fs/read_write.c:658 #1: ffff88801f9ecc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x214/0x460 fs/kernfs/file.c:287 #2: ffff8880149af490 (kn->active#164){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x238/0x460 fs/kernfs/file.c:288 #3: ffffffff8bc21a28 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0x97/0x450 drivers/net/netdevsim/bus.c:340 #4: ffff888046147178 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:754 [inline] #4: ffff888046147178 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1028 [inline] #4: ffff888046147178 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal drivers/base/dd.c:1229 [inline] #4: ffff888046147178 (&dev->mutex){....}-{3:3}, at: device_release_driver+0x17/0x30 drivers/base/dd.c:1255 #5: ffff88801cf123c0 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1342 [inline] #5: ffff88801cf123c0 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_reload_destroy+0x117/0x2d0 drivers/net/netdevsim/dev.c:1544 #6: ffffffff8c4a3188 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x30/0x160 drivers/net/netdevsim/netdev.c:380 #7: ffffffff8ad7e8a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #7: ffffffff8ad7e8a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fc/0x620 kernel/rcu/tree_exp.h:837 1 lock held by syz-executor.1/6947: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 1 lock held by syz-executor.1/6948: #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:93 [inline] #0: ffffffff902feb58 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0x83b/0xf80 net/netfilter/nfnetlink.c:290 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1635 Comm: khungtaskd Not tainted 5.14.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:105 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0x92e/0xc40 kernel/hung_task.c:295 kthread+0x38b/0x460 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10 Comm: kworker/u4:1 Not tainted 5.14.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: bat_events batadv_nc_worker RIP: 0010:__preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline] RIP: 0010:rcu_is_watching+0x7f/0xc0 kernel/rcu/tree.c:1161 Code: 01 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 1f 8b 83 48 01 00 00 d1 e8 83 e0 01 <65> ff 0d 5a 9b a8 7e 74 03 5b 5d c3 e8 2f e7 a6 ff 5b 5d c3 e8 c8 RSP: 0018:ffffc90000cf7c80 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffff8880b9c528c0 RCX: 6870606ac1602adc RDX: 0000000000000000 RSI: ffffffff893e2e20 RDI: ffff8880b9c52a08 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8f6b4967 R10: fffffbfff1ed692c R11: ffff8880b9d40288 R12: dffffc0000000000 R13: ffff888029918c00 R14: ffff888029919658 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9b4932d300 CR3: 0000000026c56000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_unlock include/linux/rcupdate.h:716 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0x5d0/0xcc0 net/batman-adv/network-coding.c:715 process_one_work+0x84c/0x13d0 kernel/workqueue.c:2276 worker_thread+0x598/0x1040 kernel/workqueue.c:2422 kthread+0x38b/0x460 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295