[PATCH] audit: do not panic kernel on invalid audit parameter

[Greg Edwards <gedwards@ddn.com>]

If you pass in an invalid audit kernel boot parameter, e.g. 'audit=off',
the kernel panics very early in boot with no output on the console
indicating the problem.

This seems overly harsh.  Instead, print the error indicating an invalid
audit parameter value and leave auditing disabled.

Fixes: 80ab4df62706 ("audit: don't use simple_strtol() anymore")
Signed-off-by: Greg Edwards <gedwards@ddn.com>
---
 kernel/audit.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/audit.c b/kernel/audit.c
index 227db99b0f19..d8af7682d6a3 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1572,8 +1572,10 @@ static int __init audit_enable(char *str)
 {
 	long val;
 
-	if (kstrtol(str, 0, &val))
-		panic("audit: invalid 'audit' parameter value (%s)\n", str);
+	if (kstrtol(str, 0, &val)) {
+		pr_err("invalid 'audit' parameter value (%s)\n", str);
+		val = AUDIT_OFF;
+	}
 	audit_default = (val ? AUDIT_ON : AUDIT_OFF);
 
 	if (audit_default == AUDIT_OFF)
-- 
2.14.3