Re: [PATCH v3 5/6] VFS: rename kern_path_locked() and related functions.

[NeilBrown]

On Sun, 21 Sep 2025, kernel test robot wrote:
> 
> Hello,
> 
> kernel test robot noticed "BUG:unable_to_handle_page_fault_for_address" on:
> 
> commit: 747e356babd8bdd569320c29916470345afd3cf7 ("[PATCH v3 5/6] VFS: rename 
> kern_path_locked() and related functions.")
> url: 
> https://github.com/intel-lab-lkp/linux/commits/NeilBrown/VFS-ovl-add-lookup_one_positive_killable/20250915-101929
> base: https://git.kernel.org/cgit/linux/kernel/git/vfs/vfs.git vfs.all
> patch link: 
> https://lore.kernel.org/all/20250915021504.2632889-6-ne...@ownmail.net/
> patch subject: [PATCH v3 5/6] VFS: rename kern_path_locked() and related 
> functions.

This incremental fix should be sufficient.

Thanks,
NeilBrown


diff --git a/fs/namei.c b/fs/namei.c
index 5ceb971632fe..92973a7a8091 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2772,7 +2772,7 @@ static struct dentry *__start_removing_path(int dfd, 
struct filename *name,
        if (unlikely(type != LAST_NORM))
                return ERR_PTR(-EINVAL);
        /* don't fail immediately if it's r/o, at least try to report other 
errors */
-       error = mnt_want_write(path->mnt);
+       error = mnt_want_write(parent_path.mnt);
        inode_lock_nested(parent_path.dentry->d_inode, I_MUTEX_PARENT);
        d = lookup_one_qstr_excl(&last, parent_path.dentry, 0);
        if (IS_ERR(d))
@@ -2789,7 +2789,7 @@ static struct dentry *__start_removing_path(int dfd, 
struct filename *name,
 unlock:
        inode_unlock(parent_path.dentry->d_inode);
        if (!error)
-               mnt_drop_write(path->mnt);
+               mnt_drop_write(parent_path.mnt);
        return d;
 }