diff mbox series

[3/5] accel/qaic: Add consistent integer overflow checks

Message ID a914d7ed-f7ef-45b5-9bca-dcc014b700eb@moroto.mountain (mailing list archive)
State New, archived
Headers show
Series accel/qaic: Improve bounds checking in encode/decode | expand

Commit Message

Dan Carpenter June 21, 2023, 7:22 a.m. UTC 
The encode_dma() function has integer overflow checks.  The
encode_passthrough(), encode_activate() and encode_status() functions
did not.  I added integer overflow checking everywhere.  I also
updated the integer overflow checking in encode_dma() to use size_add()
so everything is consistent.

Fixes: 129776ac2e38 ("accel/qaic: Add control path")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
---
 drivers/accel/qaic/qaic_control.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

Comments

Jeffrey Hugo July 7, 2023, 6:51 p.m. UTC | #1 
On 6/21/2023 1:22 AM, Dan Carpenter wrote:
> The encode_dma() function has integer overflow checks.  The
> encode_passthrough(), encode_activate() and encode_status() functions
> did not.  I added integer overflow checking everywhere.  I also
> updated the integer overflow checking in encode_dma() to use size_add()
> so everything is consistent.
> 
> Fixes: 129776ac2e38 ("accel/qaic: Add control path")
> Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>

Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Pranjal Ramajor Asha Kanojiya July 8, 2023, 5:06 a.m. UTC | #2 
On 7/8/2023 12:21 AM, Jeffrey Hugo wrote:
> On 6/21/2023 1:22 AM, Dan Carpenter wrote:
>> The encode_dma() function has integer overflow checks.  The
>> encode_passthrough(), encode_activate() and encode_status() functions
>> did not.  I added integer overflow checking everywhere.  I also
>> updated the integer overflow checking in encode_dma() to use size_add()
>> so everything is consistent.
>>
>> Fixes: 129776ac2e38 ("accel/qaic: Add control path")
>> Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
> 
> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>

Looks good to me. Just the #include <overflow.h> as Jeff suggested.

Reviewed-by: Pranjal Ramajor Asha Kanojiya <quic_pkanojiy@quicinc.com>
diff mbox series

Patch

diff --git a/drivers/accel/qaic/qaic_control.c b/drivers/accel/qaic/qaic_control.c
index 78f6c3d6380d..96a26539df18 100644
--- a/drivers/accel/qaic/qaic_control.c
+++ b/drivers/accel/qaic/qaic_control.c
@@ -366,7 +366,7 @@  static int encode_passthrough(struct qaic_device *qdev, void *trans, struct wrap
 	if (in_trans->hdr.len % 8 != 0)
 		return -EINVAL;
 
-	if (msg_hdr_len + in_trans->hdr.len > QAIC_MANAGE_EXT_MSG_LENGTH)
+	if (size_add(msg_hdr_len, in_trans->hdr.len) > QAIC_MANAGE_EXT_MSG_LENGTH)
 		return -ENOSPC;
 
 	trans_wrapper = add_wrapper(wrappers,
@@ -557,12 +557,10 @@  static int encode_dma(struct qaic_device *qdev, void *trans, struct wrapper_list
 	msg = &wrapper->msg;
 	msg_hdr_len = le32_to_cpu(msg->hdr.len);
 
-	if (msg_hdr_len > (UINT_MAX - QAIC_MANAGE_EXT_MSG_LENGTH))
-		return -EINVAL;
-
 	/* There should be enough space to hold at least one ASP entry. */
-	if (msg_hdr_len + sizeof(*out_trans) + sizeof(struct wire_addr_size_pair) >
-	    QAIC_MANAGE_EXT_MSG_LENGTH)
+	if (size_add(msg_hdr_len,
+		     sizeof(*out_trans) + sizeof(struct wire_addr_size_pair)) >
+		     QAIC_MANAGE_EXT_MSG_LENGTH)
 		return -ENOMEM;
 
 	if (in_trans->addr + in_trans->size < in_trans->addr || !in_trans->size)
@@ -634,7 +632,7 @@  static int encode_activate(struct qaic_device *qdev, void *trans, struct wrapper
 	msg = &wrapper->msg;
 	msg_hdr_len = le32_to_cpu(msg->hdr.len);
 
-	if (msg_hdr_len + sizeof(*out_trans) > QAIC_MANAGE_MAX_MSG_LENGTH)
+	if (size_add(msg_hdr_len, sizeof(*out_trans)) > QAIC_MANAGE_MAX_MSG_LENGTH)
 		return -ENOSPC;
 
 	if (!in_trans->queue_size)
@@ -718,7 +716,7 @@  static int encode_status(struct qaic_device *qdev, void *trans, struct wrapper_l
 	msg = &wrapper->msg;
 	msg_hdr_len = le32_to_cpu(msg->hdr.len);
 
-	if (msg_hdr_len + in_trans->hdr.len > QAIC_MANAGE_MAX_MSG_LENGTH)
+	if (size_add(msg_hdr_len, in_trans->hdr.len) > QAIC_MANAGE_MAX_MSG_LENGTH)
 		return -ENOSPC;
 
 	trans_wrapper = add_wrapper(wrappers, sizeof(*trans_wrapper));