diff options
| author | David Howells <dhowells@redhat.com> | 2012-05-11 10:56:56 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-05-31 00:43:25 +0100 |
| commit | 215c55abf9534e37ab8971d6e70e4ba8bf59e985 (patch) | |
| tree | 992445eb2782f9710e8d252cb3be3db3f391210f /arch/sparc/Kconfig | |
| parent | da06a5287cbb08379c844618860790adb4f38a0f (diff) | |
KEYS: Use the compat keyctl() syscall wrapper on Sparc64 for Sparc32 compat
commit 45de6767dc51358a188f75dc4ad9dfddb7fb9480 upstream.
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 <dhowells@redhat.com
cc: "David S. Miller" <davem@davemloft.net>
cc: sparclinux@vger.kernel.org
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'arch/sparc/Kconfig')
| -rw-r--r-- | arch/sparc/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index f92602e86607..f210d5120f67 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -583,6 +583,9 @@ config SYSVIPC_COMPAT depends on COMPAT && SYSVIPC default y +config KEYS_COMPAT + def_bool y if COMPAT && KEYS + endmenu source "net/Kconfig" |