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diff-lib: plug minor memory leaks in do_diff_cache() 

do_diff_cache() builds a struct rev_info to hand to diff_cache() from
scratch by initializing it using repo_init_revisions() and then
replacing its diffopt and prune_data members.

The diffopt member is initialized to a heap-allocated list of options,
though.  Release it using diff_setup_done() before overwriting it.

The initial value of the prune_data member doesn't need to be released,
but the copy created using copy_pathspec() does.  Clear it after use.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2020-11-14 19:37:03 +01:00 committed by Junio C Hamano
parent 898f80736c
commit d44e5267ea
1 changed files with 2 additions and 0 deletions
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diff-lib.c
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@ -536,10 +536,12 @@ int do_diff_cache(const struct object_id *tree_oid, struct diff_options *opt)
repo_init_revisions(opt->repo, &revs, NULL);
copy_pathspec(&revs.prune_data, &opt->pathspec);
diff_setup_done(&revs.diffopt);
revs.diffopt = *opt;
if (diff_cache(&revs, tree_oid, NULL, 1))
exit(128);
clear_pathspec(&revs.prune_data);
return 0;
}