[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 1bf093d..0ea96ba 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -304,7 +304,7 @@
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;
