提交 300b994b 编写于 作者: A Alexey Dobriyan

proc: fix return value of proc_reg_open() in "too late" case

If ->open() wasn't called, returning 0 is misleading and, theoretically,
oopsable:
1) remove_proc_entry clears ->proc_fops, drops lock,
2) ->open "succeeds",
3) ->release oopses, because it assumes ->open was called (single_release()).
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
上级 3fa8749e
......@@ -342,7 +342,7 @@ static int proc_reg_open(struct inode *inode, struct file *file)
if (!pde->proc_fops) {
spin_unlock(&pde->pde_unload_lock);
kfree(pdeo);
return rv;
return -EINVAL;
}
pde->pde_users++;
open = pde->proc_fops->open;
......
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