Bug is in the new dev_ifname32:
uifr = compat_alloc_user_space(sizeof(struct ifreq));
if (copy_in_user(uifr, compat_ptr(arg), sizeof(struct ifreq32)));
return -EFAULT;
There's a stray ";" after the if statement, that was obviously not
tested :-)
This fixes it here (tested):
----------------------------------------------------------------------------
[PATCH] Fix new dev_ifname32 returning -EFAULT
A stray semicolon slipped in the patch that updated dev_ifname32 to
not be inline, causing it to always return -EFAULT. This fixes it.
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
---
Index: linux-work/fs/compat_ioctl.c
===================================================================
--- linux-work.orig/fs/compat_ioctl.c 2007-10-31 13:30:42.000000000 +1100
+++ linux-work/fs/compat_ioctl.c 2007-10-31 13:30:46.000000000 +1100
@@ -322,7 +322,7 @@ static int dev_ifname32(unsigned int fd,
int err;
uifr = compat_alloc_user_space(sizeof(struct ifreq));
- if (copy_in_user(uifr, compat_ptr(arg), sizeof(struct ifreq32)));
+ if (copy_in_user(uifr, compat_ptr(arg), sizeof(struct ifreq32)))
return -EFAULT;
err = sys_ioctl(fd, SIOCGIFNAME, (unsigned long)uifr);
-
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