From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Kangjie Lu <kjlu@umn.edu>, Takashi Iwai <tiwai@suse.de>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 3.18 04/15] ALSA: sb8: add a check for request_region
Date: Fri, 29 Mar 2019 20:57:19 -0400 [thread overview]
Message-ID: <20190330005730.28777-4-sashal@kernel.org> (raw)
In-Reply-To: <20190330005730.28777-1-sashal@kernel.org>
From: Kangjie Lu <kjlu@umn.edu>
[ Upstream commit dcd0feac9bab901d5739de51b3f69840851f8919 ]
In case request_region fails, the fix returns an error code to
avoid NULL pointer dereference.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/isa/sb/sb8.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/sound/isa/sb/sb8.c b/sound/isa/sb/sb8.c
index 6c32b3aa34af..938262d3aa7b 100644
--- a/sound/isa/sb/sb8.c
+++ b/sound/isa/sb/sb8.c
@@ -111,6 +111,10 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev)
/* block the 0x388 port to avoid PnP conflicts */
acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");
+ if (!acard->fm_res) {
+ err = -EBUSY;
+ goto _err;
+ }
if (port[dev] != SNDRV_AUTO_PORT) {
if ((err = snd_sbdsp_create(card, port[dev], irq[dev],
--
2.19.1
next prev parent reply other threads:[~2019-03-30 0:57 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-30 0:57 [PATCH AUTOSEL 3.18 01/15] perf/core: Restore mmap record type correctly Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 02/15] ext4: report real fs size after failed resize Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 03/15] ALSA: echoaudio: add a check for ioremap_nocache Sasha Levin
2019-03-30 0:57 ` Sasha Levin [this message]
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 05/15] IB/mlx4: Fix race condition between catas error reset and aliasguid flows Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 06/15] mmc: davinci: remove extraneous __init annotation Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 07/15] ALSA: opl3: fix mismatch between snd_opl3_drum_switch definition and declaration Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 08/15] thermal/int340x_thermal: fix mode setting Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 09/15] tools/power turbostat: return the exit status of a command Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 10/15] perf top: Fix error handling in cmd_top() Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 11/15] perf tests: Fix a memory leak in test__perf_evsel__tp_sched_test() Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 12/15] x86/hpet: Prevent potential NULL pointer dereference Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 13/15] x86/cpu/cyrix: Use correct macros for Cyrix calls on Geode processors Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 14/15] iommu/vt-d: Check capability before disabling protected memory Sasha Levin
2019-03-30 0:57 ` [PATCH AUTOSEL 3.18 15/15] fix incorrect error code mapping for OBJECTID_NOT_FOUND Sasha Levin
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