From 6e8aeda224c83c7c7841e143d410b6d0e7bda05e Mon Sep 17 00:00:00 2001 From: Lukas Wunner Date: Tue, 10 Dec 2019 14:39:50 +0100 Subject: ALSA: hda/hdmi - Fix duplicate unref of pci_dev Nicholas Johnson reports a null pointer deref as well as a refcount underflow upon hot-removal of a Thunderbolt-attached AMD eGPU. He's bisected the issue down to commit 586bc4aab878 ("ALSA: hda/hdmi - fix vgaswitcheroo detection for AMD"). The commit iterates over PCI devices using pci_get_class() and unreferences each device found, even though pci_get_class() subsequently unreferences the device as well. Fix it. Fixes: 586bc4aab878 ("ALSA: hda/hdmi - fix vgaswitcheroo detection for AMD") Link: https://lore.kernel.org/r/PSXP216MB0438BFEAA0617283A834E11580580@PSXP216MB0438.KORP216.PROD.OUTLOOK.COM/ Reported-and-tested-by: Nicholas Johnson Signed-off-by: Lukas Wunner Reviewed-by: Alex Deucher Cc: Mika Westerberg Cc: Alexander Deucher Cc: Bjorn Helgaas Link: https://lore.kernel.org/r/77aa6c01aefe1ebc4004e87b0bc714f2759f15c4.1575985006.git.lukas@wunner.de Signed-off-by: Takashi Iwai --- sound/pci/hda/hda_intel.c | 1 - 1 file changed, 1 deletion(-) (limited to 'sound/pci/hda') diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 35b4526f0d28..b856b89378ac 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1419,7 +1419,6 @@ static bool atpx_present(void) return true; } } - pci_dev_put(pdev); } return false; } -- cgit v1.2.3-59-g8ed1b