This is a note to let you know that I've just added the patch titled
ipmi: ipmi_devintf: compat_ioctl method fails to take ipmi_mutex
to the 3.9-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:
ipmi-ipmi_devintf-compat_ioctl-method-fails-to-take-ipmi_mutex.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6368087e851e697679af059b4247aca33a69cef3 Mon Sep 17 00:00:00 2001
From: Benjamin LaHaise <bcrl@xxxxxxxxx>
Date: Thu, 16 May 2013 14:04:27 -0500
Subject: ipmi: ipmi_devintf: compat_ioctl method fails to take ipmi_mutex
From: Benjamin LaHaise <bcrl@xxxxxxxxx>
commit 6368087e851e697679af059b4247aca33a69cef3 upstream.
When a 32 bit version of ipmitool is used on a 64 bit kernel, the
ipmi_devintf code fails to correctly acquire ipmi_mutex. This results in
incomplete data being retrieved in some cases, or other possible failures.
Add a wrapper around compat_ipmi_ioctl() to take ipmi_mutex to fix this.
Signed-off-by: Benjamin LaHaise <bcrl@xxxxxxxxx>
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_devintf.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
--- a/drivers/char/ipmi/ipmi_devintf.c
+++ b/drivers/char/ipmi/ipmi_devintf.c
@@ -837,13 +837,25 @@ static long compat_ipmi_ioctl(struct fil
return ipmi_ioctl(filep, cmd, arg);
}
}
+
+static long unlocked_compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret;
+
+ mutex_lock(&ipmi_mutex);
+ ret = compat_ipmi_ioctl(filep, cmd, arg);
+ mutex_unlock(&ipmi_mutex);
+
+ return ret;
+}
#endif
static const struct file_operations ipmi_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = ipmi_unlocked_ioctl,
#ifdef CONFIG_COMPAT
- .compat_ioctl = compat_ipmi_ioctl,
+ .compat_ioctl = unlocked_compat_ipmi_ioctl,
#endif
.open = ipmi_open,
.release = ipmi_release,
Patches currently in stable-queue which might be from bcrl@xxxxxxxxx are
queue-3.9/ipmi-ipmi_devintf-compat_ioctl-method-fails-to-take-ipmi_mutex.patch
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