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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Yizhuo <yzhai003@ucr.edu>, Mark Brown <broonie@kernel.org>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.9 02/18] regulator: pfuze100-regulator: Variable "val" in pfuze100_regulator_probe() could be uninitialized
Date: Wed, 30 Oct 2019 11:56:44 -0400	[thread overview]
Message-ID: <20191030155700.10748-2-sashal@kernel.org> (raw)
In-Reply-To: <20191030155700.10748-1-sashal@kernel.org>

From: Yizhuo <yzhai003@ucr.edu>

[ Upstream commit 1252b283141f03c3dffd139292c862cae10e174d ]

In function pfuze100_regulator_probe(), variable "val" could be
initialized if regmap_read() fails. However, "val" is used to
decide the control flow later in the if statement, which is
potentially unsafe.

Signed-off-by: Yizhuo <yzhai003@ucr.edu>
Link: https://lore.kernel.org/r/20190929170957.14775-1-yzhai003@ucr.edu
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/regulator/pfuze100-regulator.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c
index 86b348740fcdc..ffb1f61d2c752 100644
--- a/drivers/regulator/pfuze100-regulator.c
+++ b/drivers/regulator/pfuze100-regulator.c
@@ -608,7 +608,13 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
 
 		/* SW2~SW4 high bit check and modify the voltage value table */
 		if (i >= sw_check_start && i <= sw_check_end) {
-			regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
+			ret = regmap_read(pfuze_chip->regmap,
+						desc->vsel_reg, &val);
+			if (ret) {
+				dev_err(&client->dev, "Fails to read from the register.\n");
+				return ret;
+			}
+
 			if (val & sw_hi) {
 				if (pfuze_chip->chip_id == PFUZE3000) {
 					desc->volt_table = pfuze3000_sw2hi;
-- 
2.20.1


  reply	other threads:[~2019-10-30 15:57 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-30 15:56 [PATCH AUTOSEL 4.9 01/18] regulator: ti-abb: Fix timeout in ti_abb_wait_txdone/ti_abb_clear_all_txdone Sasha Levin
2019-10-30 15:56 ` Sasha Levin [this message]
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 03/18] ASoC: wm_adsp: Don't generate kcontrols without READ flags Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 04/18] ASoc: rockchip: i2s: Fix RPM imbalance Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 05/18] ARM: dts: logicpd-torpedo-som: Remove twl_keypad Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 06/18] pinctrl: ns2: Fix off by one bugs in ns2_pinmux_enable() Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 07/18] ARM: mm: fix alignment handler faults under memory pressure Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 08/18] scsi: scsi_dh_alua: handle RTPG sense code correctly during state transitions Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 09/18] scsi: sni_53c710: fix compilation error Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 10/18] scsi: fix kconfig dependency warning related to 53C700_LE_ON_BE Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 11/18] ARM: dts: imx7s: Correct GPT's ipg clock source Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 12/18] USB: legousbtower: fix a signedness bug in tower_probe() Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 13/18] perf kmem: Fix memory leak in compact_gfp_flags() Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 14/18] ARM: davinci: dm365: Fix McBSP dma_slave_map entry Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 15/18] scsi: target: core: Do not overwrite CDB byte 1 Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 16/18] of: unittest: fix memory leak in unittest_data_add Sasha Levin
2019-10-30 15:56 ` [PATCH AUTOSEL 4.9 17/18] MIPS: bmips: mark exception vectors as char arrays Sasha Levin
2019-10-30 15:57 ` [PATCH AUTOSEL 4.9 18/18] cifs: Fix cifsInodeInfo lock_sem deadlock when reconnect occurs Sasha Levin

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