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

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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>
This commit is contained in:
Will Deacon 2014-06-02 11:47:29 +01:00 committed by Catalin Marinas
parent c168870704
commit 34c65c43f1
2 changed files with 10 additions and 1 deletions
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1
arch/arm64/include/asm/Kbuild
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@ -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

10
arch/arm64/include/uapi/asm/posix_types.h Normal file
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@ -0,0 +1,10 @@
#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 */