From 532998ed1e4e485c3a5d464ba5ede37b821ac3fa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Duval?= <jerome.duval@gmail.com>
Date: Fri, 29 Mar 2019 23:17:17 +0100
Subject: [PATCH] kernel/fs/fd: fcntl(F_DUPFD) should return EINVAL for invalid
 fds.

fix a failure for test-fcntl.c of gltests.

Change-Id: Ied8effdee2ddd9868bf039dbf74a3057a2541cac
Reviewed-on: https://review.haiku-os.org/c/1331
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
---
 src/system/kernel/fs/fd.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/system/kernel/fs/fd.cpp b/src/system/kernel/fs/fd.cpp
index 60914dc839..45de3762ad 100644
--- a/src/system/kernel/fs/fd.cpp
+++ b/src/system/kernel/fs/fd.cpp
@@ -159,6 +159,9 @@ new_fd_etc(struct io_context* context, struct file_descriptor* descriptor,
 	int fd = -1;
 	uint32 i;
 
+	if (firstIndex < 0 || (uint32)firstIndex >= context->table_size)
+		return B_BAD_VALUE;
+
 	mutex_lock(&context->io_mutex);
 
 	for (i = firstIndex; i < context->table_size; i++) {