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Add a nesting limit to source-file, from Fadi Afani in GitHub issue

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4223.
This commit is contained in:
nicm
2024-12-16 09:13:09 +00:00
parent bec6ce54c1
commit 6b32d195e8
2 changed files with 31 additions and 0 deletions
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30
cmd-source-file.c
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@@ -30,6 +30,9 @@
* Sources a configuration file.
*/
#define CMD_SOURCE_FILE_DEPTH_LIMIT 50
static u_int cmd_source_file_depth;
static enum cmd_retval cmd_source_file_exec(struct cmd *, struct cmdq_item *);
const struct cmd_entry cmd_source_file_entry = {
@@ -60,6 +63,16 @@ struct cmd_source_file_data {
static enum cmd_retval
cmd_source_file_complete_cb(struct cmdq_item *item, __unused void *data)
{
struct client *c = cmdq_get_client(item);
if (c == NULL) {
cmd_source_file_depth--;
log_debug("%s: depth now %u", __func__, cmd_source_file_depth);
} else {
c->source_file_depth--;
log_debug("%s: depth now %u", __func__, c->source_file_depth);
}
cfg_print_causes(item);
return (CMD_RETURN_NORMAL);
}
@@ -131,6 +144,7 @@ cmd_source_file_add(struct cmd_source_file_data *cdata, const char *path)
path = resolved;
log_debug("%s: %s", __func__, path);
cdata->files = xreallocarray(cdata->files, cdata->nfiles + 1,
sizeof *cdata->files);
cdata->files[cdata->nfiles++] = xstrdup(path);
@@ -149,6 +163,22 @@ cmd_source_file_exec(struct cmd *self, struct cmdq_item *item)
int result;
u_int i, j;
if (c == NULL) {
if (cmd_source_file_depth >= CMD_SOURCE_FILE_DEPTH_LIMIT) {
cmdq_error(item, "too many nested files");
return (CMD_RETURN_ERROR);
}
cmd_source_file_depth++;
log_debug("%s: depth now %u", __func__, cmd_source_file_depth);
} else {
if (c->source_file_depth >= CMD_SOURCE_FILE_DEPTH_LIMIT) {
cmdq_error(item, "too many nested files");
return (CMD_RETURN_ERROR);
}
c->source_file_depth++;
log_debug("%s: depth now %u", __func__, c->source_file_depth);
}
cdata = xcalloc(1, sizeof *cdata);
cdata->item = item;