From: Asmaa Mnebhi <asmaa@nvidia.com>
To: Wolfram Sang <wsa+renesas@sang-engineering.com>,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Asmaa Mnebhi <asmaa@nvidia.com>, Khalil Blaiech <kblaiech@nvidia.com>
Subject: [PATCH v5 4/8] i2c: i2c-mlxbf: prevent stack overflow in mlxbf_i2c_smbus_start_transaction()
Date: Tue, 20 Sep 2022 13:47:32 -0400 [thread overview]
Message-ID: <20220920174736.9766-5-asmaa@nvidia.com> (raw)
In-Reply-To: <20220920174736.9766-1-asmaa@nvidia.com>
memcpy() is called in a loop while 'operation->length' upper bound
is not checked and 'data_idx' also increments.
Fixes: b5b5b32081cd206b ("i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoC")
Reviewed-by: Khalil Blaiech <kblaiech@nvidia.com>
Signed-off-by: Asmaa Mnebhi <asmaa@nvidia.com>
---
drivers/i2c/busses/i2c-mlxbf.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/i2c/busses/i2c-mlxbf.c b/drivers/i2c/busses/i2c-mlxbf.c
index 8a6a0ccc1c39..1a0fc9640c23 100644
--- a/drivers/i2c/busses/i2c-mlxbf.c
+++ b/drivers/i2c/busses/i2c-mlxbf.c
@@ -731,6 +731,9 @@ mlxbf_i2c_smbus_start_transaction(struct mlxbf_i2c_priv *priv,
if (flags & MLXBF_I2C_F_WRITE) {
write_en = 1;
write_len += operation->length;
+ if (data_idx + operation->length >
+ MLXBF_I2C_MASTER_DATA_DESC_SIZE)
+ return -ENOBUFS;
memcpy(data_desc + data_idx,
operation->buffer, operation->length);
data_idx += operation->length;
--
2.30.1
next prev parent reply other threads:[~2022-09-20 17:48 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-20 17:47 [PATCH v5 0/8] i2c: i2c-mlxbf.c: bug fixes and new feature support Asmaa Mnebhi
2022-09-20 17:47 ` [PATCH v5 1/8] i2c: i2c-mlxbf.c: Fix frequency calculation Asmaa Mnebhi
2022-09-21 19:44 ` Wolfram Sang
2022-09-20 17:47 ` [PATCH v5 2/8] i2c: i2c-mlxbf.c: remove IRQF_ONESHOT Asmaa Mnebhi
2022-09-20 17:47 ` [PATCH v5 3/8] i2c: i2c-mlxbf.c: incorrect base address passed during io write Asmaa Mnebhi
2022-09-20 17:47 ` Asmaa Mnebhi [this message]
2022-09-20 17:47 ` [PATCH v5 5/8] i2c: i2c-mlxbf.c: support lock mechanism Asmaa Mnebhi
2022-09-20 17:47 ` [PATCH v5 6/8] i2c: i2c-mlxbf: add multi slave functionality Asmaa Mnebhi
2022-09-20 17:47 ` [PATCH v5 7/8] i2c: i2c-mlxbf.c: support BlueField-3 SoC Asmaa Mnebhi
2022-09-20 17:47 ` [PATCH v5 8/8] i2c: i2c-mlxbf.c: Update binding devicetree Asmaa Mnebhi
2022-09-21 6:55 ` Krzysztof Kozlowski
2022-09-21 13:12 ` Asmaa Mnebhi
2022-09-21 13:19 ` Krzysztof Kozlowski
2022-09-21 20:01 ` How to remove DT support from a driver? (was Re: [PATCH v5 8/8] i2c: i2c-mlxbf.c: Update binding devicetree) Wolfram Sang
2022-09-21 20:17 ` Asmaa Mnebhi
2022-09-24 17:31 ` Rob Herring
2022-09-26 13:18 ` Asmaa Mnebhi
2022-09-26 18:57 ` Wolfram Sang
2022-09-21 6:57 ` [PATCH v5 8/8] i2c: i2c-mlxbf.c: Update binding devicetree Krzysztof Kozlowski
2022-09-21 6:59 ` Krzysztof Kozlowski
2022-09-21 13:24 ` [PATCH v5 0/8] i2c: i2c-mlxbf.c: bug fixes and new feature support Asmaa Mnebhi
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