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| author | David Howells <dhowells@redhat.com> | 2012-05-11 10:56:56 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-01 15:18:16 +0800 |
| commit | 305d212b5e9d473230de491b2b722424af1dfc9b (patch) | |
| tree | cb02684b782eef373e6b8d3a21bfb8232495ec15 /security | |
| parent | ae5b51f1aa5ccba9c36b16c56d3c000125ae7e41 (diff) | |
| download | lwn-305d212b5e9d473230de491b2b722424af1dfc9b.tar.gz lwn-305d212b5e9d473230de491b2b722424af1dfc9b.zip | |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'security')
0 files changed, 0 insertions, 0 deletions