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Filipe Manana 5d8222a50a btrfs: abort transaction on item count overflow in __push_leaf_left()
If we try to push an item count from the right leaf that is greater than
the number of items in the leaf, we just emit a warning. This should
never happen but if it does we get an underflow in the new number of
items in the right leaf and chaos follows from it. So replace the warning
with proper error handling, by aborting the transaction and returning
-EUCLEAN, and proper logging by using btrfs_crit() instead of WARN(),
which gives us proper formatting and information about the filesystem.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
History 2025-11-24 22:42:25 +01:00
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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.