From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 20 Nov 2015 23:56:56 +0000 (-0800)
Subject: ncpfs: don't allow negative timeouts
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1491e30ed1a741009d1d38f9285f7a29e6c05c78;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

ncpfs: don't allow negative timeouts

This code causes a static checker warning because it's a user controlled
variable where we cap the upper bound but not the lower bound.  Let's
return an -EINVAL for negative timeouts.

[akpm@linux-foundation.org: remove unneeded `else']
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Jan Kara <jack@suse.com>
Cc: Petr Vandrovec <petr@vandrovec.name>
Cc: David Howells <dhowells@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/ncpfs/ioctl.c b/fs/ncpfs/ioctl.c
index 79b113048eac..0a3f9b594602 100644
--- a/fs/ncpfs/ioctl.c
+++ b/fs/ncpfs/ioctl.c
@@ -525,6 +525,8 @@ static long __ncp_ioctl(struct inode *inode, unsigned int cmd, unsigned long arg
 			switch (rqdata.cmd) {
 				case NCP_LOCK_EX:
 				case NCP_LOCK_SH:
+						if (rqdata.timeout < 0)
+							return -EINVAL;
 						if (rqdata.timeout == 0)
 							rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
 						else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)