From 45de6767dc51358a188f75dc4ad9dfddb7fb9480 Mon Sep 17 00:00:00 2001 From: David Howells Date: Fri, 11 May 2012 10:56:56 +0100 Subject: KEYS: Use the compat keyctl() syscall wrapper on Sparc64 for Sparc32 compat Use the 32-bit compat keyctl() syscall wrapper on Sparc64 for Sparc32 binary compatibility. Without this, keyctl(KEYCTL_INSTANTIATE_IOV) is liable to malfunction as it uses an iovec array read from userspace - though the kernel should survive this as it checks pointers and sizes anyway. I think all the other keyctl() function should just work, provided (a) the top 32-bits of each 64-bit argument register are cleared prior to invoking the syscall routine, and the 32-bit address space is right at the 0-end of the 64-bit address space. Most of the arguments are 32-bit anyway, and so for those clearing is not required. Signed-off-by: David Howells cc: sparclinux@vger.kernel.org cc: stable@vger.kernel.org --- arch/sparc/Kconfig | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/sparc/Kconfig') diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 6c0683d3fcba..76c7ccfb1ebe 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -584,6 +584,9 @@ config SYSVIPC_COMPAT depends on COMPAT && SYSVIPC default y +config KEYS_COMPAT + def_bool y if COMPAT && KEYS + endmenu source "net/Kconfig" -- cgit v1.2.2