INFO: task syz-executor:17701 blocked for more than 143 seconds. Not tainted 6.13.0-rc2-syzkaller-00424-gbc6a5efe3dcd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:24864 pid:17701 tgid:17701 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 __mutex_lock_common kernel/locking/mutex.c:665 [inline] __mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735 add_one_compat_dev+0x10d/0x710 drivers/infiniband/core/device.c:950 rdma_dev_init_net+0x1f1/0x280 drivers/infiniband/core/device.c:1192 ops_init+0x31e/0x590 net/core/net_namespace.c:138 setup_net+0x287/0x9e0 net/core/net_namespace.c:362 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:516 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x57d/0xa70 kernel/fork.c:3334 __do_sys_unshare kernel/fork.c:3405 [inline] __se_sys_unshare kernel/fork.c:3403 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3403 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbbc5587517 RSP: 002b:00007fff920d07a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fbbc5775f40 RCX: 00007fbbc5587517 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00007fbbc5776738 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000008 R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000 INFO: task syz-executor:17707 blocked for more than 144 seconds. Not tainted 6.13.0-rc2-syzkaller-00424-gbc6a5efe3dcd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:24864 pid:17707 tgid:17707 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 __mutex_lock_common kernel/locking/mutex.c:665 [inline] __mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735 add_one_compat_dev+0x10d/0x710 drivers/infiniband/core/device.c:950 rdma_dev_init_net+0x1f1/0x280 drivers/infiniband/core/device.c:1192 ops_init+0x31e/0x590 net/core/net_namespace.c:138 setup_net+0x287/0x9e0 net/core/net_namespace.c:362 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:516 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x57d/0xa70 kernel/fork.c:3334 __do_sys_unshare kernel/fork.c:3405 [inline] __se_sys_unshare kernel/fork.c:3403 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3403 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3abb587517 RSP: 002b:00007ffe6d6c85c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f3abb775f40 RCX: 00007f3abb587517 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00007f3abb776738 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008 R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744 3 locks held by kworker/u8:2/35: #0: ffff88814df61148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88814df61148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90000ab7d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000ab7d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4755 4 locks held by kworker/u8:6/1319: #0: ffff88801baf5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801baf5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc9000458fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9000458fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x16a/0xd50 net/core/net_namespace.c:602 #3: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: wg_destruct+0x25/0x2e0 drivers/net/wireguard/device.c:246 2 locks held by getty/5587: #0: ffff888034ea20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 4 locks held by kworker/0:12/6214: 3 locks held by kworker/0:15/6217: 2 locks held by syz-executor/17656: #0: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512 #1: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: mpls_net_exit+0x7d/0x2a0 net/mpls/af_mpls.c:2706 2 locks held by syz-executor/17660: #0: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512 #1: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: ppp_exit_net+0xe3/0x3d0 drivers/net/ppp/ppp_generic.c:1146 2 locks held by syz-executor/17662: #0: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512 #1: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: wg_netns_pre_exit+0x1f/0x1e0 drivers/net/wireguard/device.c:415 2 locks held by syz-executor/17664: #0: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512 #1: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: ppp_exit_net+0xe3/0x3d0 drivers/net/ppp/ppp_generic.c:1146 2 locks held by syz-executor/17683: #0: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512 #1: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: ip_tunnel_init_net+0x20e/0x720 net/ipv4/ip_tunnel.c:1159 2 locks held by syz-executor/17687: #0: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512 #1: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: setup_net+0x602/0x9e0 net/core/net_namespace.c:384 3 locks held by kworker/u8:0/17689: #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90003607d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90003607d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281 4 locks held by syz-executor/17701: #0: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512 #1: ffffffff8fa27250 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x198/0x280 drivers/infiniband/core/device.c:1186 #2: ffffffff8fa27410 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x1e6/0x280 drivers/infiniband/core/device.c:1191 #3: ffff8880730b8f40 (&device->compat_devs_mutex){+.+.}-{4:4}, at: add_one_compat_dev+0x10d/0x710 drivers/infiniband/core/device.c:950 5 locks held by syz-executor/17703: #0: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512 #1: ffffffff8fa27250 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x198/0x280 drivers/infiniband/core/device.c:1186 #2: ffffffff8fa27410 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x1e6/0x280 drivers/infiniband/core/device.c:1191 #3: ffff88802a550f40 (&device->compat_devs_mutex){+.+.}-{4:4}, at: add_one_compat_dev+0x10d/0x710 drivers/infiniband/core/device.c:950 #4: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: ib_get_eth_speed+0x153/0x800 drivers/infiniband/core/verbs.c:1995 6 locks held by syz-executor/17705: #0: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512 #1: ffffffff8fa27250 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x198/0x280 drivers/infiniband/core/device.c:1186 #2: ffffffff8fa27410 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x1e6/0x280 drivers/infiniband/core/device.c:1191 #3: ffff8880730b8f40 (&device->compat_devs_mutex){+.+.}-{4:4}, at: add_one_compat_dev+0x10d/0x710 drivers/infiniband/core/device.c:950 #4: ffff8880730b9238 (&rxe->usdev_lock){+.+.}-{4:4}, at: rxe_query_port+0x61/0x260 drivers/infiniband/sw/rxe/rxe_verbs.c:54 #5: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: ib_get_eth_speed+0x153/0x800 drivers/infiniband/core/verbs.c:1995 4 locks held by syz-executor/17707: #0: ffffffff8fca5a90 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512 #1: ffffffff8fa27250 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x198/0x280 drivers/infiniband/core/device.c:1186 #2: ffffffff8fa27410 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x1e6/0x280 drivers/infiniband/core/device.c:1191 #3: ffff8880730b8f40 (&device->compat_devs_mutex){+.+.}-{4:4}, at: add_one_compat_dev+0x10d/0x710 drivers/infiniband/core/device.c:950 1 lock held by syz-executor/17742: #0: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:128 [inline] #0: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x47e/0x1bd0 net/ipv4/devinet.c:987 1 lock held by syz-executor/17746: #0: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:128 [inline] #0: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x47e/0x1bd0 net/ipv4/devinet.c:987 1 lock held by syz-executor/17750: #0: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:128 [inline] #0: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x47e/0x1bd0 net/ipv4/devinet.c:987 1 lock held by syz-executor/17752: #0: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:128 [inline] #0: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x47e/0x1bd0 net/ipv4/devinet.c:987 1 lock held by syz-executor/17755: #0: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:128 [inline] #0: ffffffff8fcb1f48 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x47e/0x1bd0 net/ipv4/devinet.c:987 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc2-syzkaller-00424-gbc6a5efe3dcd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline] watchdog+0xff6/0x1040 kernel/hung_task.c:397 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6214 Comm: kworker/0:12 Not tainted 6.13.0-rc2-syzkaller-00424-gbc6a5efe3dcd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Workqueue: events_power_efficient neigh_periodic_work RIP: 0010:__dev_queue_xmit+0x8de/0x3f50 Code: 24 18 00 0f 85 51 ff ff ff e8 1e 26 0b f8 48 8b 7c 24 28 48 8b 74 24 10 48 8b 94 24 d0 00 00 00 e8 f7 f3 ff ff 48 89 44 24 18 <48> 8b 44 24 18 48 8d 58 10 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 RSP: 0018:ffffc90000006ae0 EFLAGS: 00000282 RAX: ffff88803498a800 RBX: 0000000000000000 RCX: ffff888034090000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffc90000006dd0 R08: ffffffff89942dda R09: 0000000000000000 R10: ffffc90000006cc0 R11: fffff52000000da6 R12: 1ffff1100a5c4c00 R13: 1ffff110081d1cb0 R14: ffff888040e8e584 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc1df43ff98 CR3: 000000000e736000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dev_queue_xmit include/linux/netdevice.h:3212 [inline] neigh_hh_output include/net/neighbour.h:523 [inline] neigh_output include/net/neighbour.h:537 [inline] ip6_finish_output2+0x1284/0x17b0 net/ipv6/ip6_output.c:141 ip6_finish_output+0x41e/0x840 net/ipv6/ip6_output.c:226 synproxy_send_tcp_ipv6+0x568/0x7c0 net/netfilter/nf_synproxy_core.c:851 synproxy_send_client_synack_ipv6+0x827/0xcc0 net/netfilter/nf_synproxy_core.c:897 nft_synproxy_eval_v6 net/netfilter/nft_synproxy.c:90 [inline] nft_synproxy_do_eval+0x739/0xa60 net/netfilter/nft_synproxy.c:145 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288 nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5672 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5785 process_backlog+0x662/0x15b0 net/core/dev.c:6117 __napi_poll+0xcb/0x490 net/core/dev.c:6883 napi_poll net/core/dev.c:6952 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7074 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 do_softirq+0x11b/0x1e0 kernel/softirq.c:462 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:389 neigh_periodic_work+0xbcb/0xde0 net/core/neighbour.c:968 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244