ALSA: intel_hdmi: Fix off-by-one error in __hdmi_lpe_audio_probe()

commit 8cbe564974248ee980562be02f2b1912769562c7 upstream.

In __hdmi_lpe_audio_probe(), strscpy() is incorrectly called with the
length of the source string (excluding the NUL terminator) rather than
the size of the destination buffer. This results in one character less
being copied from 'card->shortname' to 'pcm->name'.

Use the destination buffer size instead to ensure the card name is
copied correctly.

Cc: stable@vger.kernel.org
Fixes: 75b1a8f9d62e ("ALSA: Convert strlcpy to strscpy when return value is unused")
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20250805234156.60294-1-thorsten.blum@linux.dev
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/x86/intel_hdmi_audio.c b/sound/x86/intel_hdmi_audio.c
index d41ea09ffbe56ba9f6235690873c384c2e0632ab..571a092b128a219558363a8aa4b979f9cb070b21 100644 (file)
--- a/sound/x86/intel_hdmi_audio.c
+++ b/sound/x86/intel_hdmi_audio.c
@@ -1767,7 +1767,7 @@ static int __hdmi_lpe_audio_probe(struct platform_device *pdev)
                /* setup private data which can be retrieved when required */
                pcm->private_data = ctx;
                pcm->info_flags = 0;
-               strscpy(pcm->name, card->shortname, strlen(card->shortname));
+               strscpy(pcm->name, card->shortname, sizeof(pcm->name));
                /* setup the ops for playback */
                snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &had_pcm_ops);