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[ Upstream commit eef034ac6690118c88f357b00e2b3239c9d8575d ] When aops->write_begin() does not initialize fsdata, KMSAN may report an error passing the latter to aops->write_end(). Fix this by unconditionally initializing fsdata. Fixes: f2b6a16eb8f5 ("fs: affs convert to new aops") Suggested-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Alexander Potapenko <glider@google.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> Signed-off-by: Sasha Levin <sashal@kernel.org>