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Merge branch 'jk/show-branch-lift-name-len-limit'

Browse Source 
"git show-branch" expected there were only very short branch names
in the repository and used a fixed-length buffer to hold them
without checking for overflow.

* jk/show-branch-lift-name-len-limit:
  show-branch: use skip_prefix to drop magic numbers
  show-branch: store resolved head in heap buffer
  show-branch: drop head_len variable
This commit is contained in:
Junio C Hamano 2017-02-27 13:57:16 -08:00
commit 74a772774d
1 changed files with 13 additions and 29 deletions
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42
builtin/show-branch.c
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@ -275,8 +275,7 @@ static void show_one_commit(struct commit *commit, int no_name)
pp_commit_easy(CMIT_FMT_ONELINE, commit, &pretty);
pretty_str = pretty.buf;
}
if (starts_with(pretty_str, "[PATCH] "))
pretty_str += 8;
skip_prefix(pretty_str, "[PATCH] ", &pretty_str);
if (!no_name) {
if (name && name->head_name) {
@ -470,18 +469,14 @@ static void snarf_refs(int head, int remotes)
}
}
static int rev_is_head(char *head, int headlen, char *name,
static int rev_is_head(const char *head, const char *name,
unsigned char *head_sha1, unsigned char *sha1)
{
if ((!head[0]) ||
(head_sha1 && sha1 && hashcmp(head_sha1, sha1)))
if (!head || (head_sha1 && sha1 && hashcmp(head_sha1, sha1)))
return 0;
if (starts_with(head, "refs/heads/"))
head += 11;
if (starts_with(name, "refs/heads/"))
name += 11;
else if (starts_with(name, "heads/"))
name += 6;
skip_prefix(head, "refs/heads/", &head);
if (!skip_prefix(name, "refs/heads/", &name))
skip_prefix(name, "heads/", &name);
return !strcmp(head, name);
}
@ -620,9 +615,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
int all_heads = 0, all_remotes = 0;
int all_mask, all_revs;
enum rev_sort_order sort_order = REV_SORT_IN_GRAPH_ORDER;
char head[128];
const char *head_p;
int head_len;
char *head;
struct object_id head_oid;
int merge_base = 0;
int independent = 0;
@ -787,32 +780,24 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
snarf_refs(all_heads, all_remotes);
}
head_p = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
head_oid.hash, NULL);
if (head_p) {
head_len = strlen(head_p);
memcpy(head, head_p, head_len + 1);
}
else {
head_len = 0;
head[0] = 0;
}
head = resolve_refdup("HEAD", RESOLVE_REF_READING,
head_oid.hash, NULL);
if (with_current_branch && head_p) {
if (with_current_branch && head) {
int has_head = 0;
for (i = 0; !has_head && i < ref_name_cnt; i++) {
/* We are only interested in adding the branch
* HEAD points at.
*/
if (rev_is_head(head,
head_len,
ref_name[i],
head_oid.hash, NULL))
has_head++;
}
if (!has_head) {
int offset = starts_with(head, "refs/heads/") ? 11 : 0;
append_one_rev(head + offset);
const char *name = head;
skip_prefix(name, "refs/heads/", &name);
append_one_rev(name);
}
}
@ -866,7 +851,6 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
for (i = 0; i < num_rev; i++) {
int j;
int is_head = rev_is_head(head,
head_len,
ref_name[i],
head_oid.hash,
rev[i]->object.oid.hash);