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714d02b419
The lookup helpers API was changed by merge of vfs-6.16-rc1.async.dir to pass a non-const qstr pointer argument to lookup_one*() helpers. All of the callers of this API were changed to pass a pointer to temp copy of qstr, except overlays that was passing a const pointer to dentry->d_name that was changed to pass a non-const copy instead when doing a lookup in lower layer which is not the fs of said dentry. This wrong use of the API caused a regression in fstest overlay/012. Fix the regression by making a non-const copy of dentry->d_name prior to calling the lookup API, but the API should be fixed to not allow this class of bugs. Cc: NeilBrown <neilb@suse.de> Fixes:5741909697("VFS: improve interface for lookup_one functions") Fixes:390e34bc14("VFS: change lookup_one_common and lookup_noperm_common to take a qstr") Signed-off-by: Amir Goldstein <amir73il@gmail.com> Link: https://lore.kernel.org/20250605101530.2336320-1-amir73il@gmail.com Signed-off-by: Christian Brauner <brauner@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.