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| author | Patrick Steinhardt <ps@pks.im> | 2016-02-23 11:07:03 +0100 |
|---|---|---|
| committer | Patrick Steinhardt <ps@pks.im> | 2016-02-23 12:07:37 +0100 |
| commit | 32f0798413f83cbd1c22e11d81eeb9f664181ec9 (patch) | |
| tree | 175a37ecc6c982dbd59f08102e63593e44b4f2cd | |
| parent | 3d1abc5afcee2b878d835df11530aab8ffa0d1e1 (diff) | |
| download | libgit2-32f0798413f83cbd1c22e11d81eeb9f664181ec9.tar.gz | |
diff_tform: fix potential NULL pointer access
The `normalize_find_opts` function in theory allows for the
incoming diff to have no repository. When the caller does not
pass in diff find options or if the GIT_DIFF_FIND_BY_CONFIG value
is set, though, we try to derive the configuration from the
diff's repository configuration without first verifying that the
repository is actually set to a non-NULL value.
Fix this issue by explicitly checking if the repository is set
and if it is not, fall back to a default value of
GIT_DIFF_FIND_RENAMES.
| -rw-r--r-- | src/diff_tform.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/src/diff_tform.c b/src/diff_tform.c index 7cff34159..8577f06b8 100644 --- a/src/diff_tform.c +++ b/src/diff_tform.c @@ -261,18 +261,23 @@ static int normalize_find_opts( if (!given || (given->flags & GIT_DIFF_FIND_ALL) == GIT_DIFF_FIND_BY_CONFIG) { - char *rule = - git_config__get_string_force(cfg, "diff.renames", "true"); - int boolval; - - if (!git__parse_bool(&boolval, rule) && !boolval) - /* don't set FIND_RENAMES if bool value is false */; - else if (!strcasecmp(rule, "copies") || !strcasecmp(rule, "copy")) - opts->flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES; - else - opts->flags |= GIT_DIFF_FIND_RENAMES; + if (diff->repo) { + char *rule = + git_config__get_string_force(cfg, "diff.renames", "true"); + int boolval; + + if (!git__parse_bool(&boolval, rule) && !boolval) + /* don't set FIND_RENAMES if bool value is false */; + else if (!strcasecmp(rule, "copies") || !strcasecmp(rule, "copy")) + opts->flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES; + else + opts->flags |= GIT_DIFF_FIND_RENAMES; - git__free(rule); + git__free(rule); + } else { + /* set default flag */ + opts->flags |= GIT_DIFF_FIND_RENAMES; + } } /* some flags imply others */ |