From 133cbbe403c850da3efdaa6dcfc0cf55145d0aa2 Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@systemlinux.org>
Date: Sat, 11 Jul 2009 21:01:27 +0200
Subject: [PATCH] Fix com_init() in case arguments are given.

As the ->name field of struct afs_table was only initialized in the afs process,
com_init(), which gets forked from the server process, did not see the table
names and would segfault due to a NULL pointer dereference if table names
were given as arguments.

Fix it by initializing the ->name fields in the definition of the afs_tables array.

This bug was introduced in commit 53d503ce back in 2007...
---
 afs.c       | 28 ++++++++++++++--------------
 aft.c       |  1 -
 attribute.c |  1 -
 blob.c      |  1 -
 4 files changed, 14 insertions(+), 17 deletions(-)

diff --git a/afs.c b/afs.c
index 72e2490e..ccda7cda 100644
--- a/afs.c
+++ b/afs.c
@@ -54,13 +54,13 @@ enum afs_table_num {
 };
 
 static struct afs_table afs_tables[NUM_AFS_TABLES] = {
-	[TBLNUM_AUDIO_FILES] = {.init = aft_init},
-	[TBLNUM_ATTRIBUTES] = {.init = attribute_init},
-	[TBLNUM_SCORES] = {.init = score_init},
-	[TBLNUM_MOODS] = {.init = moods_init},
-	[TBLNUM_LYRICS] = {.init = lyrics_init},
-	[TBLNUM_IMAGES] = {.init = images_init},
-	[TBLNUM_PLAYLIST] = {.init = playlists_init},
+	[TBLNUM_AUDIO_FILES] = {.init = aft_init, .name = "audio_files"},
+	[TBLNUM_ATTRIBUTES] = {.init = attribute_init, .name = "attributes"},
+	[TBLNUM_SCORES] = {.init = score_init, .name = "scores"},
+	[TBLNUM_MOODS] = {.init = moods_init, .name = "moods"},
+	[TBLNUM_LYRICS] = {.init = lyrics_init, .name = "lyrics"},
+	[TBLNUM_IMAGES] = {.init = images_init, .name = "images"},
+	[TBLNUM_PLAYLIST] = {.init = playlists_init, .name = "playlists"},
 };
 
 struct command_task {
@@ -1072,7 +1072,7 @@ static void create_tables_callback(int fd, const struct osl_object *query)
 {
 	uint32_t table_mask = *(uint32_t *)query->data;
 	int i, ret;
-	char *buf;
+	struct para_buffer pb = {.buf = NULL};
 
 	close_afs_tables();
 	for (i = 0; i < NUM_AFS_TABLES; i++) {
@@ -1085,15 +1085,15 @@ static void create_tables_callback(int fd, const struct osl_object *query)
 		ret = t->create(database_dir);
 		if (ret < 0)
 			goto out;
+		para_printf(&pb, "successfully created %s table\n", t->name);
 	}
 	ret = open_afs_tables();
 out:
-	if (ret >= 0)
-		buf = make_message("successfully created afs table(s)\n");
-	else
-		buf = make_message("%s\n", para_strerror(-ret));
-	pass_buffer_as_shm(buf, strlen(buf), &fd);
-	free(buf);
+	if (ret < 0)
+		para_printf(&pb, "%s\n", para_strerror(-ret));
+	if (pb.buf)
+		pass_buffer_as_shm(pb.buf, pb.offset, &fd);
+	free(pb.buf);
 }
 
 int com_init(int fd, int argc, char * const * const argv)
diff --git a/aft.c b/aft.c
index 20fa3a96..00e38d76 100644
--- a/aft.c
+++ b/aft.c
@@ -2619,7 +2619,6 @@ static int aft_event_handler(enum afs_events event, struct para_buffer *pb,
 
 void aft_init(struct afs_table *t)
 {
-	t->name = audio_file_table_desc.name;
 	t->open = aft_open;
 	t->close = aft_close;
 	t->create = aft_create;
diff --git a/attribute.c b/attribute.c
index 30c12f1c..df66c9d0 100644
--- a/attribute.c
+++ b/attribute.c
@@ -604,7 +604,6 @@ static int attribute_create(const char *dir)
  */
 void attribute_init(struct afs_table *t)
 {
-	t->name = attribute_table_desc.name;
 	t->open = attribute_open;
 	t->close = attribute_close;
 	t->create = attribute_create;
diff --git a/blob.c b/blob.c
index dbabba22..92332272 100644
--- a/blob.c
+++ b/blob.c
@@ -518,7 +518,6 @@ static int blob_open(struct osl_table **table,
 #define DEFINE_BLOB_INIT(table_name) \
 	void table_name ## _init(struct afs_table *t) \
 	{ \
-		t->name = table_name ## _table_desc.name; \
 		t->open = table_name ## _open; \
 		t->close = table_name ## _close; \
 		t->create = table_name ## _create;\
-- 
2.39.5