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[OpenWrt-Devel,3/3] jail: respect byte order when setting AUDIT_ARCH

Message ID 20150517023323.GA3440@makrotopia.org
State Accepted
Delegated to: John Crispin
Headers show

Commit Message

Daniel Golle May 17, 2015, 2:33 a.m. UTC 
AUDIT_ARCH on ARM and MIPS differs depending on the byte order.
Thus set AUDIT_ARCH to the respective endian-specific variants.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
 jail/seccomp-bpf.h | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)
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Patch

diff --git a/jail/seccomp-bpf.h b/jail/seccomp-bpf.h
index 40fe7b9..82c0669 100644
--- a/jail/seccomp-bpf.h
+++ b/jail/seccomp-bpf.h
@@ -20,6 +20,7 @@ 
 #include <signal.h>
 #include <string.h>
 #include <unistd.h>
+#include <endian.h>
 
 #include <sys/prctl.h>
 #ifndef PR_SET_NO_NEW_PRIVS
@@ -67,10 +68,18 @@  struct seccomp_data {
 # define ARCH_NR	AUDIT_ARCH_X86_64
 #elif defined(__mips__)
 # define REG_SYSCALL	regs[2]
-# define ARCH_NR	AUDIT_ARCH_MIPSEL
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+#  define ARCH_NR	AUDIT_ARCH_MIPSEL
+# else
+#  define ARCH_NR	AUDIT_ARCH_MIPS
+# endif
 #elif defined(__arm__) && (defined(__ARM_EABI__) || defined(__thumb__))
 # define REG_SYSCALL	regs.uregs[7]
-# define ARCH_NR	AUDIT_ARCH_ARM
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+#  define ARCH_NR	AUDIT_ARCH_ARM
+# else
+#  define ARCH_NR	AUDIT_ARCH_ARMEB
+# endif
 #else
 # warning "Platform does not support seccomp filter yet"
 # define REG_SYSCALL	0