[PATCH] audit: Fix check of return value of strnlen_user()

strnlen_user() returns 0 when it hits fault, not -1. Fix the test in audit_log_single_execve_arg(). Luckily this shouldn't ever happen unless there's a kernel bug so it's mostly a cosmetic fix. CC: Paul Moore <pmoore(a)redhat.com&gt; Signed-off-by: Jan Kara <jack(a)suse.cz&gt; --- kernel/auditsc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 9fb9d1cb83ce..bb947ceeee4d 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -1023,7 +1023,7 @@ static int audit_log_single_execve_arg(struct audit_context *context, * for strings that are too long, we should not have created * any. */ - if (unlikely((len == -1) || len > MAX_ARG_STRLEN - 1)) { + if (unlikely((len == 0) || len > MAX_ARG_STRLEN - 1)) { WARN_ON(1); send_sig(SIGKILL, current, 0); return -1; -- 2.1.4