[v3] kni: fix ioctl signature
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Commit Message
From: Markus Theil <markus.theil@secunet.com>
Fix kni's ioctl signature to correctly match the kernel's
structs. This shaves off the (void*) casts and uses struct file*
instead of struct inode*. With the correct signature, control flow
integrity checkers are no longer confused at this point.
Signed-off-by: Markus Theil <markus.theil@secunet.com>
Tested-by: Michael Pfeiffer <michael.pfeiffer@tu-ilmenau.de>
---
v3: adapt to suggestions from Stephen Hemminger (use unsigned int)
v2: adapt to suggestions from Ferruh Yigit
kernel/linux/kni/kni_misc.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
Comments
On Fri, 3 Dec 2021 08:19:07 +0100
Markus Theil <markus.theil@tu-ilmenau.de> wrote:
> From: Markus Theil <markus.theil@secunet.com>
>
> Fix kni's ioctl signature to correctly match the kernel's
> structs. This shaves off the (void*) casts and uses struct file*
> instead of struct inode*. With the correct signature, control flow
> integrity checkers are no longer confused at this point.
>
> Signed-off-by: Markus Theil <markus.theil@secunet.com>
> Tested-by: Michael Pfeiffer <michael.pfeiffer@tu-ilmenau.de>
> ---
Thanks for fixing.
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
03/12/2021 17:28, Stephen Hemminger:
> On Fri, 3 Dec 2021 08:19:07 +0100
> Markus Theil <markus.theil@tu-ilmenau.de> wrote:
>
> > From: Markus Theil <markus.theil@secunet.com>
> >
> > Fix kni's ioctl signature to correctly match the kernel's
> > structs. This shaves off the (void*) casts and uses struct file*
> > instead of struct inode*. With the correct signature, control flow
> > integrity checkers are no longer confused at this point.
> >
> > Signed-off-by: Markus Theil <markus.theil@secunet.com>
> > Tested-by: Michael Pfeiffer <michael.pfeiffer@tu-ilmenau.de>
> > ---
>
> Thanks for fixing.
>
> Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Applied, thanks
@@ -482,10 +482,10 @@ kni_ioctl_release(struct net *net, uint32_t ioctl_num,
return ret;
}
-static int
-kni_ioctl(struct inode *inode, uint32_t ioctl_num, unsigned long ioctl_param)
+static long
+kni_ioctl(struct file *file, unsigned int ioctl_num, unsigned long ioctl_param)
{
- int ret = -EINVAL;
+ long ret = -EINVAL;
struct net *net = current->nsproxy->net_ns;
pr_debug("IOCTL num=0x%0x param=0x%0lx\n", ioctl_num, ioctl_param);
@@ -511,8 +511,8 @@ kni_ioctl(struct inode *inode, uint32_t ioctl_num, unsigned long ioctl_param)
return ret;
}
-static int
-kni_compat_ioctl(struct inode *inode, uint32_t ioctl_num,
+static long
+kni_compat_ioctl(struct file *file, unsigned int ioctl_num,
unsigned long ioctl_param)
{
/* 32 bits app on 64 bits OS to be supported later */
@@ -525,8 +525,8 @@ static const struct file_operations kni_fops = {
.owner = THIS_MODULE,
.open = kni_open,
.release = kni_release,
- .unlocked_ioctl = (void *)kni_ioctl,
- .compat_ioctl = (void *)kni_compat_ioctl,
+ .unlocked_ioctl = kni_ioctl,
+ .compat_ioctl = kni_compat_ioctl,
};
static struct miscdevice kni_misc = {