From: Jeff King <peff@peff.net>
Date: Wed, 27 Sep 2017 06:02:21 +0000 (-0400)
Subject: worktree: use xsize_t to access file size
X-Git-Tag: v2.15.0-rc0~19^2~1
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/228740b67b55f4ee23637bd1472a73ae50efe93a?hp=228740b67b55f4ee23637bd1472a73ae50efe93a

worktree: use xsize_t to access file size

To read the "gitdir" file into memory, we stat the file and
allocate a buffer. But we store the size in an "int", which
may be truncated. We should use a size_t and xsize_t(),
which will detect truncation.

An overflow is unlikely for a "gitdir" file, but it's a good
practice to model.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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