On Mon, May 16, 2005 at 09:37:49PM -0700, Greg KH wrote:
> ioctl_by_bdev may only be used INSIDE the kernel. If the "arg" argument
> refers to memory that is accessed by put_user/get_user in the ioctl
> function, the memory needs to be in the kernel address space (that's the
> set_fs(KERNEL_DS) doing in the ioctl_by_bdev). This works on i386 because
> even with set_fs(KERNEL_DS) the user space memory is still accessible with
> put_user/get_user. That is not true for s390. In short the ioctl
> implementation of the pktcdvd device driver is horribly broken.
Same comment as for previous patch. I'll take a look at that sucker,
it might happen to be OK, seeing that most of the bdev ->ioctl() instances
ignore file argument and we might get away with passing odd stuff to
anything that could occur here.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]