This is a note to let you know that I've just added the patch titled
Char: ipmi_bt_sm, fix infinite loop
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
char-ipmi_bt_sm-fix-infinite-loop.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a94cdd1f4d30f12904ab528152731fb13a812a16 Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jslaby@xxxxxxx>
Date: Mon, 14 Apr 2014 09:46:50 -0500
Subject: Char: ipmi_bt_sm, fix infinite loop
From: Jiri Slaby <jslaby@xxxxxxx>
commit a94cdd1f4d30f12904ab528152731fb13a812a16 upstream.
In read_all_bytes, we do
unsigned char i;
...
bt->read_data[0] = BMC2HOST;
bt->read_count = bt->read_data[0];
...
for (i = 1; i <= bt->read_count; i++)
bt->read_data[i] = BMC2HOST;
If bt->read_data[0] == bt->read_count == 255, we loop infinitely in the
'for' loop. Make 'i' an 'int' instead of 'char' to get rid of the
overflow and finish the loop after 255 iterations every time.
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Reported-and-debugged-by: Rui Hui Dian <rhdian@xxxxxxxxxx>
Cc: Tomas Cech <tcech@xxxxxxx>
Cc: Corey Minyard <minyard@xxxxxxx>
Cc: <openipmi-developer@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Corey Minyard <cminyard@xxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/char/ipmi/ipmi_bt_sm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/char/ipmi/ipmi_bt_sm.c
+++ b/drivers/char/ipmi/ipmi_bt_sm.c
@@ -352,7 +352,7 @@ static inline void write_all_bytes(struc
static inline int read_all_bytes(struct si_sm_data *bt)
{
- unsigned char i;
+ unsigned int i;
/*
* length is "framing info", minimum = 4: NetFn, Seq, Cmd, cCode.
Patches currently in stable-queue which might be from jslaby@xxxxxxx are
queue-3.4/char-ipmi_bt_sm-fix-infinite-loop.patch
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