From a5f2b3d6a738e7d4180012fe7b541172f8c8dcea Mon Sep 17 00:00:00 2001 From: Chen Gang Date: Thu, 16 May 2013 14:04:25 -0500 Subject: [PATCH] drivers/char/ipmi: memcpy, need additional 2 bytes to avoid memory overflow 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 Signed-off-by: Corey Minyard Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds --- drivers/char/ipmi/ipmi_bt_sm.c | 4 ++-- 1 file 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 */ -- 2.20.1