linux

mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 11:50:43 +09:00

Files

Heiko Carstens 44d3398477 s390/compat: fix mmap compat system calls

commit e858712185 upstream.

The native 31 bit and the compat behaviour for the mmap system calls differ:

In native 31 bit mode the passed in address for the mmap system call will be
unmodified passed to sys_mmap_pgoff().
In compat mode however the passed in address will be modified with
compat_ptr() which masks out the most significant bit.

The result is that in native 31 bit mode each mmap request (with MAP_FIXED)
will fail where the most significat bit is set, while in compat mode it
may succeed.

This odd behaviour was introduced with d3815898 "[S390] mmap: add missing
compat_ptr conversion to both mmap compat syscalls".

To restore a consistent behaviour accross native and compat mode this
patch functionally reverts the above mentioned commit.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2012-08-26 15:12:10 -07:00

appldata

[S390] mm: add ZONE_DMA to 31-bit config again

2011-05-26 09:48:25 +02:00

boot

Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6

2011-03-20 18:14:55 -07:00

crypto

Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2011-05-20 17:24:14 -07:00

hypfs

treewide: remove extra semicolons