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authorJunio C Hamano <gitster@pobox.com>2014-03-25 18:07:09 (GMT)
committerJunio C Hamano <gitster@pobox.com>2014-03-25 18:07:09 (GMT)
commitec8cd4fc111266e005d1a1bc3d4b388564105ce2 (patch)
treebb12b71a3ab1cb0898c24539e420e47c4c8eaab4 /entry.c
parent34a2e88ae28a58a3530e54a6194112c22f59c16a (diff)
parent2f29e0c6fa5d312c4e0675b0dd23d3126b9f55fa (diff)
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Merge branch 'mh/remove-subtree-long-pathname-fix'
* mh/remove-subtree-long-pathname-fix: entry.c: fix possible buffer overflow in remove_subtree() checkout_entry(): use the strbuf throughout the function
Diffstat (limited to 'entry.c')
-rw-r--r--entry.c64
1 files changed, 32 insertions, 32 deletions
diff --git a/entry.c b/entry.c
index 7b7aa81..77c6882 100644
--- a/entry.c
+++ b/entry.c
@@ -44,33 +44,33 @@ static void create_directories(const char *path, int path_len,
free(buf);
}
-static void remove_subtree(const char *path)
+static void remove_subtree(struct strbuf *path)
{
- DIR *dir = opendir(path);
+ DIR *dir = opendir(path->buf);
struct dirent *de;
- char pathbuf[PATH_MAX];
- char *name;
+ int origlen = path->len;
if (!dir)
- die_errno("cannot opendir '%s'", path);
- strcpy(pathbuf, path);
- name = pathbuf + strlen(path);
- *name++ = '/';
+ die_errno("cannot opendir '%s'", path->buf);
while ((de = readdir(dir)) != NULL) {
struct stat st;
+
if (is_dot_or_dotdot(de->d_name))
continue;
- strcpy(name, de->d_name);
- if (lstat(pathbuf, &st))
- die_errno("cannot lstat '%s'", pathbuf);
+
+ strbuf_addch(path, '/');
+ strbuf_addstr(path, de->d_name);
+ if (lstat(path->buf, &st))
+ die_errno("cannot lstat '%s'", path->buf);
if (S_ISDIR(st.st_mode))
- remove_subtree(pathbuf);
- else if (unlink(pathbuf))
- die_errno("cannot unlink '%s'", pathbuf);
+ remove_subtree(path);
+ else if (unlink(path->buf))
+ die_errno("cannot unlink '%s'", path->buf);
+ strbuf_setlen(path, origlen);
}
closedir(dir);
- if (rmdir(path))
- die_errno("cannot rmdir '%s'", path);
+ if (rmdir(path->buf))
+ die_errno("cannot rmdir '%s'", path->buf);
}
static int create_file(const char *path, unsigned int mode)
@@ -245,27 +245,25 @@ static int check_path(const char *path, int len, struct stat *st, int skiplen)
int checkout_entry(struct cache_entry *ce,
const struct checkout *state, char *topath)
{
- static struct strbuf path_buf = STRBUF_INIT;
- char *path;
+ static struct strbuf path = STRBUF_INIT;
struct stat st;
- int len;
if (topath)
return write_entry(ce, topath, state, 1);
- strbuf_reset(&path_buf);
- strbuf_add(&path_buf, state->base_dir, state->base_dir_len);
- strbuf_add(&path_buf, ce->name, ce_namelen(ce));
- path = path_buf.buf;
- len = path_buf.len;
+ strbuf_reset(&path);
+ strbuf_add(&path, state->base_dir, state->base_dir_len);
+ strbuf_add(&path, ce->name, ce_namelen(ce));
- if (!check_path(path, len, &st, state->base_dir_len)) {
+ if (!check_path(path.buf, path.len, &st, state->base_dir_len)) {
unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
if (!changed)
return 0;
if (!state->force) {
if (!state->quiet)
- fprintf(stderr, "%s already exists, no checkout\n", path);
+ fprintf(stderr,
+ "%s already exists, no checkout\n",
+ path.buf);
return -1;
}
@@ -280,12 +278,14 @@ int checkout_entry(struct cache_entry *ce,
if (S_ISGITLINK(ce->ce_mode))
return 0;
if (!state->force)
- return error("%s is a directory", path);
- remove_subtree(path);
- } else if (unlink(path))
- return error("unable to unlink old '%s' (%s)", path, strerror(errno));
+ return error("%s is a directory", path.buf);
+ remove_subtree(&path);
+ } else if (unlink(path.buf))
+ return error("unable to unlink old '%s' (%s)",
+ path.buf, strerror(errno));
} else if (state->not_new)
return 0;
- create_directories(path, len, state);
- return write_entry(ce, path, state, 0);
+
+ create_directories(path.buf, path.len, state);
+ return write_entry(ce, path.buf, state, 0);
}