Commit 34c65c43 authored Jun 02, 2014 by Will Deacon Committed by Catalin Marinas Jun 18, 2014

arm64: uid16: fix __kernel_old_{gid,uid}_t definitions



Whilst native arm64 applications don't have the 16-bit UID/GID syscalls
wired up, compat tasks can still access them. The 16-bit wrappers for
these syscalls use __kernel_old_uid_t and __kernel_old_gid_t, which must
be 16-bit data types to maintain compatibility with the 16-bit UIDs used
by compat applications.

This patch defines 16-bit __kernel_old_{gid,uid}_t types for arm64
instead of using the 32-bit types provided by asm-generic.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent c1688707

arch/arm64/include/asm/Kbuild

+0 −1

Original line number	Diff line number	Diff line
		@@ -30,7 +30,6 @@ generic-y += msgbuf.h
		generic-y += mutex.h
		generic-y += pci.h
		generic-y += poll.h
		generic-y += posix_types.h
		generic-y += preempt.h
		generic-y += resource.h
		generic-y += rwsem.h

arch/arm64/include/uapi/asm/posix_types.h

0 → 100644

+10 −0

Original line number	Diff line number	Diff line
		#ifndef __ASM_POSIX_TYPES_H
		#define __ASM_POSIX_TYPES_H

		typedef unsigned short __kernel_old_uid_t;
		typedef unsigned short __kernel_old_gid_t;
		#define __kernel_old_uid_t __kernel_old_uid_t

		#include <asm-generic/posix_types.h>

		#endif /* __ASM_POSIX_TYPES_H */