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shared/seccomp-util: address family filtering is broken on ppc
This reverts the gist ofda1921a5c3
and0d9fca76bb
(for ppc). Quoting #17559: > libseccomp 2.5 added socket syscall multiplexing on ppc64(el): > https://github.com/seccomp/libseccomp/pull/229 > > Like with i386, s390 and s390x this breaks socket argument filtering, so > RestrictAddressFamilies doesn't work. > > This causes the unit test to fail: > /* test_restrict_address_families */ > Operating on architecture: ppc > Failed to install socket family rules for architecture ppc, skipping: Operation canceled > Operating on architecture: ppc64 > Failed to add socket() rule for architecture ppc64, skipping: Invalid argument > Operating on architecture: ppc64-le > Failed to add socket() rule for architecture ppc64-le, skipping: Invalid argument > Assertion 'fd < 0' failed at src/test/test-seccomp.c:424, function test_restrict_address_families(). Aborting. > > The socket filters can't be added so `socket(AF_UNIX, SOCK_DGRAM, 0);` still > works, triggering the assertion. Fixes #17559.
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@ -1394,9 +1394,6 @@ int seccomp_restrict_address_families(Set *address_families, bool allow_list) {
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case SCMP_ARCH_X32:
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case SCMP_ARCH_ARM:
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case SCMP_ARCH_AARCH64:
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case SCMP_ARCH_PPC:
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case SCMP_ARCH_PPC64:
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case SCMP_ARCH_PPC64LE:
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case SCMP_ARCH_MIPSEL64N32:
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case SCMP_ARCH_MIPS64N32:
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case SCMP_ARCH_MIPSEL64:
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@ -1413,6 +1410,9 @@ int seccomp_restrict_address_families(Set *address_families, bool allow_list) {
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case SCMP_ARCH_X86:
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case SCMP_ARCH_MIPSEL:
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case SCMP_ARCH_MIPS:
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case SCMP_ARCH_PPC:
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case SCMP_ARCH_PPC64:
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case SCMP_ARCH_PPC64LE:
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default:
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/* These we either know we don't support (i.e. are the ones that do use socketcall()), or we
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* don't know */
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@ -33,7 +33,7 @@
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#include "virt.h"
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/* __NR_socket may be invalid due to libseccomp */
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#if !defined(__NR_socket) || __NR_socket < 0 || defined(__i386__) || defined(__s390x__) || defined(__s390__)
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#if !defined(__NR_socket) || __NR_socket < 0 || defined(__i386__) || defined(__s390x__) || defined(__s390__) || defined(__powerpc64__) || defined(__powerpc__)
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/* On these archs, socket() is implemented via the socketcall() syscall multiplexer,
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* and we can't restrict it hence via seccomp. */
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# define SECCOMP_RESTRICT_ADDRESS_FAMILIES_BROKEN 1
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