* [PATCH] drivers/char/ipmi: memcpy, need additional 2 bytes to avoid memory overflow
@ 2013-03-29 7:18 Chen Gang
2013-03-29 13:51 ` Corey Minyard
0 siblings, 1 reply; 3+ messages in thread
From: Chen Gang @ 2013-03-29 7:18 UTC (permalink / raw)
To: minyard; +Cc: Greg KH, openipmi-developer, linux-kernel@vger.kernel.org
when calling memcpy, read_data and write_data need additional 2 bytes.
write_data:
for checking: "if (size > IPMI_MAX_MSG_LENGTH)"
for operating: "memcpy(bt->write_data + 3, data + 1, size - 1)"
read_data:
for checking: "if (msg_len < 3 || msg_len > IPMI_MAX_MSG_LENGTH)"
for operating: "memcpy(data + 2, bt->read_data + 4, msg_len - 2)"
Signed-off-by: Chen Gang <gang.chen@asianux.com>
---
drivers/char/ipmi/ipmi_bt_sm.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/char/ipmi/ipmi_bt_sm.c b/drivers/char/ipmi/ipmi_bt_sm.c
index cdd4c09f..a22a7a5 100644
--- a/drivers/char/ipmi/ipmi_bt_sm.c
+++ b/drivers/char/ipmi/ipmi_bt_sm.c
@@ -95,9 +95,9 @@ struct si_sm_data {
enum bt_states state;
unsigned char seq; /* BT sequence number */
struct si_sm_io *io;
- unsigned char write_data[IPMI_MAX_MSG_LENGTH];
+ unsigned char write_data[IPMI_MAX_MSG_LENGTH + 2]; /* +2 for memcpy */
int write_count;
- unsigned char read_data[IPMI_MAX_MSG_LENGTH];
+ unsigned char read_data[IPMI_MAX_MSG_LENGTH + 2]; /* +2 for memcpy */
int read_count;
int truncated;
long timeout; /* microseconds countdown */
--
1.7.7.6
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] drivers/char/ipmi: memcpy, need additional 2 bytes to avoid memory overflow
2013-03-29 7:18 [PATCH] drivers/char/ipmi: memcpy, need additional 2 bytes to avoid memory overflow Chen Gang
@ 2013-03-29 13:51 ` Corey Minyard
2013-03-30 2:55 ` Chen Gang
0 siblings, 1 reply; 3+ messages in thread
From: Corey Minyard @ 2013-03-29 13:51 UTC (permalink / raw)
To: Chen Gang; +Cc: Greg KH, openipmi-developer, linux-kernel@vger.kernel.org
Yes, this is correct, I've pulled it into my tree.
-corey
On 03/29/2013 02:18 AM, Chen Gang wrote:
> when calling memcpy, read_data and write_data need additional 2 bytes.
>
> write_data:
> for checking: "if (size > IPMI_MAX_MSG_LENGTH)"
> for operating: "memcpy(bt->write_data + 3, data + 1, size - 1)"
>
> read_data:
> for checking: "if (msg_len < 3 || msg_len > IPMI_MAX_MSG_LENGTH)"
> for operating: "memcpy(data + 2, bt->read_data + 4, msg_len - 2)"
>
>
> Signed-off-by: Chen Gang <gang.chen@asianux.com>
> ---
> drivers/char/ipmi/ipmi_bt_sm.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/char/ipmi/ipmi_bt_sm.c b/drivers/char/ipmi/ipmi_bt_sm.c
> index cdd4c09f..a22a7a5 100644
> --- a/drivers/char/ipmi/ipmi_bt_sm.c
> +++ b/drivers/char/ipmi/ipmi_bt_sm.c
> @@ -95,9 +95,9 @@ struct si_sm_data {
> enum bt_states state;
> unsigned char seq; /* BT sequence number */
> struct si_sm_io *io;
> - unsigned char write_data[IPMI_MAX_MSG_LENGTH];
> + unsigned char write_data[IPMI_MAX_MSG_LENGTH + 2]; /* +2 for memcpy */
> int write_count;
> - unsigned char read_data[IPMI_MAX_MSG_LENGTH];
> + unsigned char read_data[IPMI_MAX_MSG_LENGTH + 2]; /* +2 for memcpy */
> int read_count;
> int truncated;
> long timeout; /* microseconds countdown */
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] drivers/char/ipmi: memcpy, need additional 2 bytes to avoid memory overflow
2013-03-29 13:51 ` Corey Minyard
@ 2013-03-30 2:55 ` Chen Gang
0 siblings, 0 replies; 3+ messages in thread
From: Chen Gang @ 2013-03-30 2:55 UTC (permalink / raw)
To: minyard
Cc: Corey Minyard, Greg KH, openipmi-developer,
linux-kernel@vger.kernel.org
On 2013年03月29日 21:51, Corey Minyard wrote:
> Yes, this is correct, I've pulled it into my tree.
thanks.
:-)
--
Chen Gang
Asianux Corporation
^ permalink raw reply [flat|nested] 3+ messages in thread
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2013-03-29 7:18 [PATCH] drivers/char/ipmi: memcpy, need additional 2 bytes to avoid memory overflow Chen Gang
2013-03-29 13:51 ` Corey Minyard
2013-03-30 2:55 ` Chen Gang
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