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authorPavel Roskin <proski@gnu.org>2005-07-29 10:49:14 -0400
committerJunio C Hamano <junkio@cox.net>2005-07-29 17:21:48 -0700
commite35f9824159bba94eecdf22d198799701ed60940 (patch)
tree0d1d08eec92d179ce02b4c4b5e961e0f6c1feddc /diff.c
parent1df092d211868b3b74f5b3981fad9b195a0bedad (diff)
downloadgit-e35f9824159bba94eecdf22d198799701ed60940.tar.gz
[PATCH] mmap error handling
I have reviewed all occurrences of mmap() in git and fixed three types of errors/defects: 1) The result is not checked. 2) The file descriptor is closed if mmap() succeeds, but not when it fails. 3) Various casts applied to -1 are used instead of MAP_FAILED, which is specifically defined to check mmap() return value. [jc: This is a second round of Pavel's patch. He fixed up the problem that close() potentially clobbering the errno from mmap, which the first round had.] Signed-off-by: Pavel Roskin <proski@gnu.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'diff.c')
-rw-r--r--diff.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/diff.c b/diff.c
index 4a4b621912..361d7c09dd 100644
--- a/diff.c
+++ b/diff.c
@@ -377,8 +377,10 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only)
if (fd < 0)
goto err_empty;
s->data = mmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0);
- s->should_munmap = 1;
close(fd);
+ if (s->data == MAP_FAILED)
+ goto err_empty;
+ s->should_munmap = 1;
}
else {
char type[20];