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 v1 5/7] i2c-mlxbf: prevent stack overflow in mlxbf_i2c_smbus_start_transaction()
Date: Tue, 16 Aug 2022 18:54:10 -0400 [thread overview]
Message-ID: <20220816225412.9095-6-asmaa@nvidia.com> (raw)
In-Reply-To: <20220816225412.9095-1-asmaa@nvidia.com>
memcpy() is called in a loop while 'operation->length' upper bound is
not checked and 'data_idx' also increments.
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 02ed6983c35c..c6959ba7113e 100644
--- a/drivers/i2c/busses/i2c-mlxbf.c
+++ b/drivers/i2c/busses/i2c-mlxbf.c
@@ -724,6 +724,9 @@ 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:[~2022-08-16 23:01 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-16 22:54 [PATCH v1 0/7] i2c-mlxbf.c: bug fixes and new feature support Asmaa Mnebhi
2022-08-16 22:54 ` [PATCH v1 1/7] i2c-mlxbf.c: Fix frequency calculation Asmaa Mnebhi
2022-08-16 22:54 ` [PATCH v1 2/7] i2c-mlxbf.c: remove IRQF_ONESHOT Asmaa Mnebhi
2022-08-16 22:54 ` [PATCH v1 3/7] i2c-mlxbf: add multi slave functionality Asmaa Mnebhi
2022-08-18 16:25 ` Wolfram Sang
2022-08-18 16:41 ` Asmaa Mnebhi
2022-08-16 22:54 ` [PATCH v1 4/7] i2c-mlxbf.c: incorrect base address passed during io write Asmaa Mnebhi
2022-08-18 16:27 ` Wolfram Sang
2022-08-18 16:40 ` Asmaa Mnebhi
2022-08-18 17:21 ` Asmaa Mnebhi
2022-08-18 20:24 ` Wolfram Sang
2022-08-18 20:30 ` Asmaa Mnebhi
2022-08-16 22:54 ` Asmaa Mnebhi [this message]
2022-08-16 22:54 ` [PATCH v1 6/7] i2c-mlxbf.c: support BlueField-3 SoC Asmaa Mnebhi
2022-08-18 15:11 ` Rob Herring
2022-08-18 20:43 ` Asmaa Mnebhi
2022-08-16 22:54 ` [PATCH v1 7/7] i2c-mlxbf.c: support lock mechanism Asmaa Mnebhi
2022-08-18 16:24 ` [PATCH v1 0/7] i2c-mlxbf.c: bug fixes and new feature support Wolfram Sang
2022-08-18 16:42 ` Asmaa Mnebhi
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