From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Christian Gromm <christian.gromm@microchip.com>,
Dan Carpenter <dan.carpenter@oracle.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sasha Levin <sashal@kernel.org>,
devel@driverdev.osuosl.org
Subject: [PATCH AUTOSEL 4.9 09/12] staging: most: sound: add sanity check for function argument
Date: Wed, 24 Feb 2021 07:55:37 -0500 [thread overview]
Message-ID: <20210224125540.484221-9-sashal@kernel.org> (raw)
In-Reply-To: <20210224125540.484221-1-sashal@kernel.org>
From: Christian Gromm <christian.gromm@microchip.com>
[ Upstream commit 45b754ae5b82949dca2b6e74fa680313cefdc813 ]
This patch checks the function parameter 'bytes' before doing the
subtraction to prevent memory corruption.
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/1612282865-21846-1-git-send-email-christian.gromm@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/staging/most/aim-sound/sound.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/staging/most/aim-sound/sound.c b/drivers/staging/most/aim-sound/sound.c
index e4198e5e064b5..288c7bf129457 100644
--- a/drivers/staging/most/aim-sound/sound.c
+++ b/drivers/staging/most/aim-sound/sound.c
@@ -92,6 +92,8 @@ static void swap_copy24(u8 *dest, const u8 *source, unsigned int bytes)
{
unsigned int i = 0;
+ if (bytes < 2)
+ return;
while (i < bytes - 2) {
dest[i] = source[i + 2];
dest[i + 1] = source[i + 1];
--
2.27.0
next prev parent reply other threads:[~2021-02-24 14:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-24 12:55 [PATCH AUTOSEL 4.9 01/12] staging: fwserial: Fix error handling in fwserial_create Sasha Levin
2021-02-24 12:55 ` [PATCH AUTOSEL 4.9 02/12] x86/reboot: Add Zotac ZBOX CI327 nano PCI reboot quirk Sasha Levin
2021-02-24 12:55 ` [PATCH AUTOSEL 4.9 03/12] vt/consolemap: do font sum unsigned Sasha Levin
2021-02-24 12:55 ` [PATCH AUTOSEL 4.9 04/12] wlcore: Fix command execute failure 19 for wl12xx Sasha Levin
2021-02-24 12:55 ` [PATCH AUTOSEL 4.9 05/12] pktgen: fix misuse of BUG_ON() in pktgen_thread_worker() Sasha Levin
2021-02-24 12:55 ` [PATCH AUTOSEL 4.9 06/12] ath10k: fix wmi mgmt tx queue full due to race condition Sasha Levin
2021-02-24 12:55 ` [PATCH AUTOSEL 4.9 07/12] x86/build: Treat R_386_PLT32 relocation as R_386_PC32 Sasha Levin
2021-02-24 12:55 ` [PATCH AUTOSEL 4.9 08/12] Bluetooth: Fix null pointer dereference in amp_read_loc_assoc_final_data Sasha Levin
2021-02-24 12:55 ` Sasha Levin [this message]
2021-02-24 12:55 ` [PATCH AUTOSEL 4.9 10/12] media: uvcvideo: Allow entities with no pads Sasha Levin
2021-02-24 12:55 ` [PATCH AUTOSEL 4.9 11/12] tomoyo: ignore data race while checking quota Sasha Levin
2021-02-24 12:55 ` [PATCH AUTOSEL 4.9 12/12] smackfs: restrict bytes count in smackfs write functions Sasha Levin
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