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authorMax Kellermann <max@duempel.org>2009-01-22 16:14:34 +0100
committerMax Kellermann <max@duempel.org>2009-01-22 16:14:34 +0100
commit1f8a1cbc08c87369583e57d44ee165b40346b7cf (patch)
tree09a3cf0ed32a7091803a8f48a0be06897bfe9df8 /src
parent1e6a26b6cae1e9bd90d820c6ea4ec8be2da2da91 (diff)
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playlist: fix buffer underflow when getting current song
The function moveSongInPlaylist() attempted to read the position of the current song, even if it was -1. Check that first. The same bug was in shufflePlaylist().
Diffstat (limited to '')
-rw-r--r--src/playlist.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/src/playlist.c b/src/playlist.c
index 4580ccbcc..99d1a1c69 100644
--- a/src/playlist.c
+++ b/src/playlist.c
@@ -963,7 +963,7 @@ enum playlist_result moveSongInPlaylist(unsigned from, int to)
unsigned i;
struct song *tmpSong;
unsigned tmpId;
- unsigned currentSong;
+ int currentSong;
if (from >= playlist.length)
return PLAYLIST_RESULT_BAD_RANGE;
@@ -979,9 +979,10 @@ enum playlist_result moveSongInPlaylist(unsigned from, int to)
* (to < 0) => move to offset from current song
* (-playlist.length == to) => move to position BEFORE current song
*/
- currentSong = playlist.order[playlist.current];
+ currentSong = playlist.current >= 0
+ ? (int)playlist.order[playlist.current] : -1;
if (to < 0 && playlist.current >= 0) {
- if (currentSong == from)
+ if ((unsigned)currentSong == from)
/* no-op, can't be moved to offset of itself */
return PLAYLIST_RESULT_SUCCESS;
to = (currentSong + abs(to)) % playlist.length;
@@ -990,7 +991,7 @@ enum playlist_result moveSongInPlaylist(unsigned from, int to)
if (playlist_state == PLAYLIST_STATE_PLAY && playlist.queued >= 0) {
int queuedSong = playlist.order[playlist.queued];
if (queuedSong == (int)from || queuedSong == to
- || currentSong == from || (int)currentSong == to)
+ || currentSong == (int)from || currentSong == to)
clearPlayerQueue();
}
@@ -1160,11 +1161,13 @@ void shufflePlaylist(void)
if (playlist.length > 1) {
if (playlist_state == PLAYLIST_STATE_PLAY) {
- if (playlist.queued >= 0)
+ if (playlist.queued >= 0) {
clearPlayerQueue();
- /* put current playing song first */
- swapSongs(0, playlist.order[playlist.current]);
+ /* put current playing song first */
+ swapSongs(0, playlist.order[playlist.current]);
+ }
+
if (playlist.random) {
int j;
for (j = 0; 0 != playlist.order[j]; j++) ;