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| author | Chen Gang <gang.chen@asianux.com> | 2013-05-16 14:04:25 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-19 11:38:44 -0700 |
| commit | 29a5fc4815c1ba9365e68927e0c4a267dbba87ca (patch) | |
| tree | 741f04fa4e03d9aa0e91e54bcfc18c15768137f5 | |
| parent | dce292e9ad1153354e730824f6d90df2c470784d (diff) | |
| download | lwn-29a5fc4815c1ba9365e68927e0c4a267dbba87ca.tar.gz lwn-29a5fc4815c1ba9365e68927e0c4a267dbba87ca.zip | |
drivers/char/ipmi: memcpy, need additional 2 bytes to avoid memory overflow
commit a5f2b3d6a738e7d4180012fe7b541172f8c8dcea upstream.
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>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | 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 cdd4c09fda96..a22a7a502740 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 */ |