[PATCH] audit: fix broken class-based syscall audit

The sanity check in audit_match_class() is wrong.  We are able to audit
2048 syscalls but in audit_match_class() we were accidentally using
sizeof(_u32) instead of number of bits in _u32 when deciding how many
syscalls were valid.  On ia64 in particular we were hitting syscall
numbers over the (wrong) limit of 256.  Fixing the audit_match_class
check takes care of the problem.

Signed-off-by: Klaus Weidner <klaus@atsec.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 1bf093dcffe03e9f97dc4a8e91b4a99bd6f11b32..0ea96bab91cced251de1b00e733f46c0e8c2e6d8 100644 (file)
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -304,7 +304,7 @@ int __init audit_register_class(int class, unsigned *list)
 
 int audit_match_class(int class, unsigned syscall)
 {
-       if (unlikely(syscall >= AUDIT_BITMASK_SIZE * sizeof(__u32)))
+       if (unlikely(syscall >= AUDIT_BITMASK_SIZE * 32))
                return 0;
        if (unlikely(class >= AUDIT_SYSCALL_CLASSES || !classes[class]))
                return 0;