From 46e18b7f722c2e4e9c4764774a2932debf35ece2 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Tue, 22 Nov 2011 16:58:35 +0800 Subject: ALSA: hda - fix ELD memory leak Backported from commit b95d68b8179764e29558b75cec35ef4a6a98925b. memset(eld) clears eld->proc_entry which will leak the struct snd_info_entry when unloading module. Fix it by - memset only the fields before eld->eld_buffer - set eld->eld_valid to true _after_ all eld fields have been filled Cc: Pierre-louis Bossart Acked-by: Stephen Warren Signed-off-by: Wu Fengguang Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/pci/hda/patch_hdmi.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) (limited to 'sound/pci/hda/patch_hdmi.c') diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 19cb72db9c38..e287015cbbb3 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -920,20 +920,23 @@ static void hdmi_present_sense(struct hda_codec *codec, hda_nid_t pin_nid, * the unsolicited response to avoid custom WARs. */ int present = snd_hda_pin_sense(codec, pin_nid); + bool eld_valid = false; - memset(eld, 0, sizeof(*eld)); +#ifdef CONFIG_PROC_FS + memset(eld, 0, offsetof(struct hdmi_eld, proc_entry)); +#else + memset(eld, 0, sizeof(struct hdmi_eld)); +#endif eld->monitor_present = !!(present & AC_PINSENSE_PRESENCE); if (eld->monitor_present) - eld->eld_valid = !!(present & AC_PINSENSE_ELDV); - else - eld->eld_valid = 0; + eld_valid = !!(present & AC_PINSENSE_ELDV); printk(KERN_INFO "HDMI status: Codec=%d Pin=%d Presence_Detect=%d ELD_Valid=%d\n", - codec->addr, pin_nid, eld->monitor_present, eld->eld_valid); + codec->addr, pin_nid, eld->monitor_present, eld_valid); - if (eld->eld_valid) + if (eld_valid) if (!snd_hdmi_get_eld(eld, codec, pin_nid)) snd_hdmi_show_eld(eld); -- cgit v1.2.3