From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Jay Fang <f.fangjian@huawei.com>, Mark Brown <broonie@kernel.org>,
Sasha Levin <sashal@kernel.org>,
linux-spi@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 04/25] spi: spi-topcliff-pch: Fix potential double free in pch_spi_process_messages()
Date: Sun, 4 Jul 2021 19:11:02 -0400 [thread overview]
Message-ID: <20210704231123.1491517-4-sashal@kernel.org> (raw)
In-Reply-To: <20210704231123.1491517-1-sashal@kernel.org>
From: Jay Fang <f.fangjian@huawei.com>
[ Upstream commit 026a1dc1af52742c5897e64a3431445371a71871 ]
pch_spi_set_tx() frees data->pkt_tx_buff on failure of kzalloc() for
data->pkt_rx_buff, but its caller, pch_spi_process_messages(), will
free data->pkt_tx_buff again. Set data->pkt_tx_buff to NULL after
kfree() to avoid double free.
Signed-off-by: Jay Fang <f.fangjian@huawei.com>
Link: https://lore.kernel.org/r/1620284888-65215-1-git-send-email-f.fangjian@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/spi/spi-topcliff-pch.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index fa730a871d25..f3ffcb9ce5e3 100644
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -585,8 +585,10 @@ static void pch_spi_set_tx(struct pch_spi_data *data, int *bpw)
data->pkt_tx_buff = kzalloc(size, GFP_KERNEL);
if (data->pkt_tx_buff != NULL) {
data->pkt_rx_buff = kzalloc(size, GFP_KERNEL);
- if (!data->pkt_rx_buff)
+ if (!data->pkt_rx_buff) {
kfree(data->pkt_tx_buff);
+ data->pkt_tx_buff = NULL;
+ }
}
if (!data->pkt_rx_buff) {
--
2.30.2
next prev parent reply other threads:[~2021-07-04 23:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-04 23:10 [PATCH AUTOSEL 4.14 01/25] spi: Make of_register_spi_device also set the fwnode Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 02/25] media: sh_vou: fix pm_runtime_get_sync() usage count Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 03/25] spi: spi-loopback-test: Fix 'tx_buf' might be 'rx_buf' Sasha Levin
2021-07-04 23:11 ` Sasha Levin [this message]
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 05/25] spi: omap-100k: Fix the length judgment problem Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 06/25] crypto: nx - add missing MODULE_DEVICE_TABLE Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 07/25] media: cpia2: fix memory leak in cpia2_usb_probe Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 08/25] media: cobalt: fix race condition in setting HPD Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 09/25] media: pvrusb2: fix warning in pvr2_i2c_core_done Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 10/25] crypto: qat - check return code of qat_hal_rd_rel_reg() Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 11/25] crypto: qat - remove unused macro in FW loader Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 12/25] media: em28xx: Fix possible memory leak of em28xx struct Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 13/25] media: v4l2-core: Avoid the dangling pointer in v4l2_fh_release Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 14/25] media: bt8xx: Fix a missing check bug in bt878_probe Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 15/25] media: st-hva: Fix potential NULL pointer dereferences Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 16/25] media: dvd_usb: memory leak in cinergyt2_fe_attach Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 17/25] mmc: via-sdmmc: add a check against NULL pointer dereference Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 18/25] crypto: shash - avoid comparing pointers to exported functions under CFI Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 19/25] media: dvb_net: avoid speculation from net slot Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 20/25] media: siano: fix device register error path Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 21/25] btrfs: fix error handling in __btrfs_update_delayed_inode Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 22/25] btrfs: abort transaction if we fail to update the delayed inode Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 23/25] btrfs: make Private2 lifespan more consistent Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 24/25] btrfs: disable build on platforms having page size 256K Sasha Levin
2021-07-04 23:11 ` [PATCH AUTOSEL 4.14 25/25] regulator: da9052: Ensure enough delay time for .set_voltage_time_sel Sasha Levin
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