dd07bb8b6b
The name passed into __xfs_xattr_put_listent is exactly namelen bytes
long and not null-terminated. Passing namelen+1 to the strscpy function
strscpy(offset, (char *)name, namelen + 1);
is therefore wrong. Go back to the old code, which works fine because
strncpy won't find a null in @name and stops after namelen bytes. It
really could be a memcpy call, but it worked for years.
Reported-by: syzbot+898115bc6d7140437215@syzkaller.appspotmail.com
Fixes: 8954c44ff477 ("xfs: use strscpy() to instead of strncpy()")
Signed-off-by: Darrick J. Wong <djwong@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 Restructured Text 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.