Yes, you are right. I've pulled this in to my tree. Looking at this, ipmi_mutex really should go away and be replaced bu something that scales better, but I guess it's not that critical for IPMI.
-corey On 05/13/2013 02:39 PM, Benjamin LaHaise wrote: > 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. > This is probably a candidate for -stable as well. > > Signed-off-by: Benjamin LaHaise <[email protected]> > --- > drivers/char/ipmi/ipmi_devintf.c | 14 +++++++++++++- > 1 files changed, 13 insertions(+), 1 deletions(-) > > diff --git a/drivers/char/ipmi/ipmi_devintf.c > b/drivers/char/ipmi/ipmi_devintf.c > index 9eb360f..d5a5f02 100644 > --- a/drivers/char/ipmi/ipmi_devintf.c > +++ b/drivers/char/ipmi/ipmi_devintf.c > @@ -837,13 +837,25 @@ static long compat_ipmi_ioctl(struct file *filep, > unsigned int cmd, > 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, ------------------------------------------------------------------------------ AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d _______________________________________________ Openipmi-developer mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/openipmi-developer
