sh: Fix access to released memory in clk_debugfs_register_one()

[firefly-linux-kernel-4.4.55.git] / arch / sh / kernel / cpu / clock.c

diff --git a/arch/sh/kernel/cpu/clock.c b/arch/sh/kernel/cpu/clock.c
index f3a46be2ae81c169ffebbd486fec123b643f9118..83da5debeedff422f4683fdbb0af5eda9a9bab5f 100644 (file)
--- a/arch/sh/kernel/cpu/clock.c
+++ b/arch/sh/kernel/cpu/clock.c
@@ -598,7 +598,7 @@ static struct dentry *clk_debugfs_root;
 static int clk_debugfs_register_one(struct clk *c)
 {
        int err;
-       struct dentry *d, *child;
+       struct dentry *d, *child, *child_tmp;
        struct clk *pa = c->parent;
        char s[255];
        char *p = s;
@@ -630,7 +630,7 @@ static int clk_debugfs_register_one(struct clk *c)
 
 err_out:
        d = c->dentry;
-       list_for_each_entry(child, &d->d_subdirs, d_u.d_child)
+       list_for_each_entry_safe(child, child_tmp, &d->d_subdirs, d_u.d_child)
                debugfs_remove(child);
        debugfs_remove(c->dentry);
        return err;