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| author |   David Howells <dhowells@redhat.com> | 2012-05-11 10:56:56 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2012-05-11 10:56:56 +0100 |
| commit | 45de6767dc51358a188f75dc4ad9dfddb7fb9480 (patch) | |
| tree | fd73c68347190acb0b14ef51095d9e7d713af2d7 /arch/sparc/Kconfig | |
| parent | Merge tag 'v3.4-rc5' into next (diff) | |
| download | linux-dev-45de6767dc51358a188f75dc4ad9dfddb7fb9480.tar.xz linux-dev-45de6767dc51358a188f75dc4ad9dfddb7fb9480.zip | |
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 <dhowells@redhat.com
cc: "David S. Miller" <davem@davemloft.net>
cc: sparclinux@vger.kernel.org
cc: stable@vger.kernel.org
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 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" |