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authorZubin Mithra <zsm@chromium.org>2019-04-04 14:33:55 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-17 08:36:46 +0200
commitc35bf96aba0ca6bd6c7e5e180bc43d1a0f0c43f7 (patch)
treee1485f05b94613560a907d6226e4cb44e0e1c443
parenta3320acb47874c0977dd49d8adc19d5047f52f1a (diff)
ALSA: seq: Fix OOB-reads from strlcpy
commit 212ac181c158c09038c474ba68068be49caecebb upstream. When ioctl calls are made with non-null-terminated userspace strings, strlcpy causes an OOB-read from within strlen. Fix by changing to use strscpy instead. Signed-off-by: Zubin Mithra <zsm@chromium.org> Reviewed-by: Guenter Roeck <groeck@chromium.org> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--sound/core/seq/seq_clientmgr.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 965473d4129c..09491b27092e 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -1249,7 +1249,7 @@ static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client,
/* fill the info fields */
if (client_info->name[0])
- strlcpy(client->name, client_info->name, sizeof(client->name));
+ strscpy(client->name, client_info->name, sizeof(client->name));
client->filter = client_info->filter;
client->event_lost = client_info->event_lost;
@@ -1527,7 +1527,7 @@ static int snd_seq_ioctl_create_queue(struct snd_seq_client *client, void *arg)
/* set queue name */
if (!info->name[0])
snprintf(info->name, sizeof(info->name), "Queue-%d", q->queue);
- strlcpy(q->name, info->name, sizeof(q->name));
+ strscpy(q->name, info->name, sizeof(q->name));
snd_use_lock_free(&q->use_lock);
return 0;
@@ -1589,7 +1589,7 @@ static int snd_seq_ioctl_set_queue_info(struct snd_seq_client *client,
queuefree(q);
return -EPERM;
}
- strlcpy(q->name, info->name, sizeof(q->name));
+ strscpy(q->name, info->name, sizeof(q->name));
queuefree(q);
return 0;