INFO: task syz-executor.5:25343 blocked for more than 143 seconds. Not tainted 6.2.0-rc7-syzkaller-00135-g38c1e0c65865 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27256 pid:25343 ppid:5107 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xb8a/0x5450 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6741 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa48/0x1360 kernel/locking/mutex.c:747 add_one_compat_dev drivers/infiniband/core/device.c:943 [inline] add_one_compat_dev+0xea/0x830 drivers/infiniband/core/device.c:920 rdma_dev_init_net+0x2b9/0x4b0 drivers/infiniband/core/device.c:1185 ops_init+0xb9/0x670 net/core/net_namespace.c:135 setup_net+0x793/0xe60 net/core/net_namespace.c:333 copy_net_ns+0x31b/0x6b0 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc5/0x1f0 kernel/nsproxy.c:228 ksys_unshare+0x449/0x920 kernel/fork.c:3202 __do_sys_unshare kernel/fork.c:3273 [inline] __se_sys_unshare kernel/fork.c:3271 [inline] __x64_sys_unshare+0x31/0x40 kernel/fork.c:3271 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f7d01e8c0f9 RSP: 002b:00007f7d02c4f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f7d01fac120 RCX: 00007f7d01e8c0f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00007f7d01ee7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffeff8735f R14: 00007f7d02c4f300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8c78f7b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: