Re: [PATCH 2/3] [RFC] seccomp: give BPF x32 bit when restoring x32 filter
On 07/10/2014 08:38 PM, Richard Guy Briggs wrote:
Commit
fca460f hpa(a)zytor.com 2012-02-19 07:56:26 -0800
x32: Handle the x32 system call flag
provided a method to multiplex architecture with the syscall number for X32
calls.
Commit
8b4b9f2 pmoore(a)redhat.com 2013-02-15 12:21:43 -0500
x86: remove the x32 syscall bitmask from syscall_get_nr()
broke audit and potentially other users of syscall_get_nr() which depend on
that call as named.
Commit
audit: add AUDIT_ARCH_X86_X32 arch definition
is required to provide the new ARCH definition AUDIT_ARCH_X86_X32 for
syscall_get_arch().
This patch along with reverting 8b4b9f2 should satisfy other regular users of
syscall_get_nr() without changing the seccomp interface to BPF.
Incidentally: do seccomp users know that on an x86-64 system you can
recevie system calls from any of the x86 architectures, regardless of
how the program is invoked? (This is unusual, so normally denying those
"alien" calls is the right thing to do.)
-hpa