[PATCH v2 1/2] module: Correct wake up of module_wq
From: Petr Pavlu <petr.pavlu@suse.com>
Date: 2022-09-19 12:33:34
Also in:
lkml
Subsystem:
module support, the rest · Maintainers:
Luis Chamberlain, Petr Pavlu, Daniel Gomez, Sami Tolvanen, Linus Torvalds
The module_wq wait queue has only non-exclusive waiters and all waits are interruptible, therefore for consistency use wake_up_interruptible() to wake its waiters. Suggested-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Petr Pavlu <petr.pavlu@suse.com> --- kernel/module/main.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/module/main.c b/kernel/module/main.c
index a4e4d84b6f4e..06cb41c3d2a1 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c@@ -763,7 +763,7 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user, free_module(mod); /* someone could wait for the module in add_unformed_module() */ - wake_up_all(&module_wq); + wake_up_interruptible(&module_wq); return 0; out: mutex_unlock(&module_mutex);
@@ -2524,7 +2524,7 @@ static noinline int do_init_module(struct module *mod) schedule_work(&init_free_wq); mutex_unlock(&module_mutex); - wake_up_all(&module_wq); + wake_up_interruptible(&module_wq); return 0;
@@ -2540,7 +2540,7 @@ static noinline int do_init_module(struct module *mod) klp_module_going(mod); ftrace_release_mod(mod); free_module(mod); - wake_up_all(&module_wq); + wake_up_interruptible(&module_wq); return ret; }
@@ -2886,7 +2886,7 @@ static int load_module(struct load_info *info, const char __user *uargs, /* Unlink carefully: kallsyms could be walking list. */ list_del_rcu(&mod->list); mod_tree_remove(mod); - wake_up_all(&module_wq); + wake_up_interruptible(&module_wq); /* Wait for RCU-sched synchronizing before releasing mod->list. */ synchronize_rcu(); mutex_unlock(&module_mutex);
--
2.35.3