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[ Upstream commit1f4613cdbe] When reflinking an inline extent, we assert that its file offset is 0 and that its uncompressed length is not greater than the sector size. We then return an error if one of those conditions is not satisfied. However we use a return statement, which results in returning from btrfs_clone() without freeing the path and buffer that were allocated before, as well as not clearing the flag BTRFS_INODE_NO_DELALLOC_FLUSH for the destination inode. Fix that by jumping to the 'out' label instead, and also add a WARN_ON() for each condition so that in case assertions are disabled, we get to known which of the unexpected conditions triggered the error. Fixes:a61e1e0df9("Btrfs: simplify inline extent handling when doing reflinks") Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> Signed-off-by: Sasha Levin <sashal@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.