b2d9f2dc01
Smatch complains about a possible dereference of a pointer that was not
initialized:
CC [M] fs/btrfs/reflink.o
CHECK fs/btrfs/reflink.c
fs/btrfs/reflink.c:533 btrfs_clone() error: potentially dereferencing uninitialized 'trans'.
This is because we are not dealing with the case where the type of a file
extent has an unexpected value (not regular, not prealloc and not inline),
in which case the transaction handle pointer is not initialized.
Such unexpected type should be impossible, except in case of some memory
corruption caused either by bad hardware or some software bug causing
something like a buffer overrun.
So ASSERT that if the extent type is neither regular nor prealloc, then
it must be inline. Bail out with -EUCLEAN and a warning in case it is
not. This silences smatch.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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.