John David Anglin 03d1bba87a parisc: Fix validity check of pointer size argument in new CAS implementation ... commit 05f016d2ca upstream. As noted by Christoph Biedl, passing a pointer size of 4 in the new CAS implementation causes a kernel crash. The attached patch corrects the off by one error in the argument validity check. In reviewing the code, I noticed that we only perform word operations with the pointer size argument. The subi instruction intentionally uses a word condition on 64-bit kernels. Nullification was used instead of a cmpib instruction as the branch should never be taken. The shlw pseudo-operation generates a depw,z instruction and it clears the target before doing a shift left word deposit. Thus, we don't need to clip the upper 32 bits of this argument on 64-bit kernels. Tested with a gcc testsuite run with a 64-bit kernel. The gcc atomic code in libgcc is the only direct user of the new CAS implementation that I am aware of. Signed-off-by: John David Anglin <dave.anglin@bell.net> Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-11-30 08:39:08 +00:00
..
configs	mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS	2016-08-30 10:10:21 -07:00
include	parisc/mm: Ensure IRQs are off in switch_mm()	2017-07-21 07:42:20 +02:00
kernel	parisc: Fix validity check of pointer size argument in new CAS implementation	2017-11-30 08:39:08 +00:00
lib	parisc: fix bugs in pa_memcpy	2017-04-21 09:31:20 +02:00
math-emu	parisc: Fix typo in fpudispatch.c	2016-05-22 22:29:07 +02:00
mm	parisc: Report SIGSEGV instead of SIGBUS when running out of stack	2017-07-21 07:42:20 +02:00
oprofile	oprofile: more whitespace fixes	2008-10-15 20:55:51 +02:00
Kconfig	parisc: Switch to generic sched_clock implementation	2016-11-25 12:31:58 +01:00
Kconfig.debug	parisc: Fix ftrace function tracer	2016-04-14 17:47:19 +02:00
Makefile	parisc: Fix ftrace function tracer	2016-04-14 17:47:19 +02:00
defpalo.conf	parisc: switch to gzip-compressed vmlinuz kernel	2013-07-09 22:09:20 +02:00
install.sh	parisc: make "make install" not depend on vmlinux	2013-11-07 22:28:06 +01:00
nm	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00