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| author | Dave Jones <davej@redhat.com> | 2006-03-06 14:03:37 +0100 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-03-22 10:36:15 +0100 |
| commit | 5e315e9248329c53a8932b71532c28240125e3c4 (patch) | |
| tree | b04a95d8f4aab4be44a3b19d4ace4f9337e4de11 /sound/drivers/opl3/opl3_seq.c | |
| parent | 3de4414e798795ef5d719622dbf12bbe27a9e72e (diff) | |
| download | op-kernel-dev-5e315e9248329c53a8932b71532c28240125e3c4.zip op-kernel-dev-5e315e9248329c53a8932b71532c28240125e3c4.tar.gz | |
[ALSA] Fix use after free in opl3_seq and opl3_oss
Modules: OPL3
Don't read from free'd memory. Also make use of the return
value, and don't register the device if something went wrong
creating the port.
Coverity #954, #955
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/drivers/opl3/opl3_seq.c')
| -rw-r--r-- | sound/drivers/opl3/opl3_seq.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sound/drivers/opl3/opl3_seq.c b/sound/drivers/opl3/opl3_seq.c index e26556d..57becf3 100644 --- a/sound/drivers/opl3/opl3_seq.c +++ b/sound/drivers/opl3/opl3_seq.c @@ -207,8 +207,10 @@ static int snd_opl3_synth_create_port(struct snd_opl3 * opl3) 16, voices, name); if (opl3->chset->port < 0) { + int port; + port = opl3->chset->port; snd_midi_channel_free_set(opl3->chset); - return opl3->chset->port; + return port; } return 0; } @@ -218,7 +220,7 @@ static int snd_opl3_synth_create_port(struct snd_opl3 * opl3) static int snd_opl3_seq_new_device(struct snd_seq_device *dev) { struct snd_opl3 *opl3; - int client; + int client, err; char name[32]; int opl_ver; @@ -239,7 +241,11 @@ static int snd_opl3_seq_new_device(struct snd_seq_device *dev) if (client < 0) return client; - snd_opl3_synth_create_port(opl3); + if ((err = snd_opl3_synth_create_port(opl3)) < 0) { + snd_seq_delete_kernel_client(client); + opl3->seq_client = -1; + return err; + } /* initialize instrument list */ opl3->ilist = snd_seq_instr_list_new(); |
