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linux/arch/sparc
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Dmitry V. Levin 5301c06477 sparc64: fix incorrect sign extension in sys_sparc64_personality 
[ Upstream commit 525fd5a94e ]

The value returned by sys_personality has type "long int".
It is saved to a variable of type "int", which is not a problem
yet because the type of task_struct->pesonality is "unsigned int".
The problem is the sign extension from "int" to "long int"
that happens on return from sys_sparc64_personality.

For example, a userspace call personality((unsigned) -EINVAL) will
result to any subsequent personality call, including absolutely
harmless read-only personality(0xffffffff) call, failing with
errno set to EINVAL.

Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
History 2016-02-03 16:23:15 -05:00
..
boot sparc: Add "install" target 2014-08-04 20:45:59 -07:00
configs sparc: Set CONFIG_NET=y in defconfigs 2014-09-24 13:38:30 -04:00
crypto crypto: sparc - initialize blkcipher.ivsize 2015-10-27 09:51:53 +09:00
include sparc64: Fix userspace FPU register corruptions. 2015-08-16 20:52:16 -07:00
kernel sparc64: fix incorrect sign extension in sys_sparc64_personality 2016-02-03 16:23:15 -05:00
lib sparc64: Fix userspace FPU register corruptions. 2015-08-16 20:52:16 -07:00
math-emu arch/sparc/math-emu/math_32.c: drop stray break operator 2014-08-04 20:29:06 -07:00
mm sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE 2015-05-31 22:15:01 -07:00
net net: filter: make JITs zero A for SKF_AD_ALU_XOR_X 2016-01-31 11:23:36 -08:00
oprofile sparc: using HZ needs an include of linux/param.h 2009-10-05 00:46:08 -07:00
power Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2014-10-11 20:36:34 -04:00
prom sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
Kbuild sparc64: Add SHA1 driver making use of the 'sha1' instruction. 2012-08-20 15:08:49 -07:00
Kconfig sparc: expose number of page table levels 2015-04-14 16:49:02 -07:00
Kconfig.debug lib: consolidate DEBUG_STACK_USAGE option 2011-05-25 08:39:54 -07:00
Makefile sparc: Add "install" target 2014-08-04 20:45:59 -07:00