linux-kernel - [PATCH] 9p: unsigned/signed wrap in p9/unix modes.

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Message-Id: <1381184340-11190-1-git-send-email-geyslan@gmail.com>
Date:	Mon,  7 Oct 2013 19:19:00 -0300
From:	"Geyslan G. Bem" <geyslan@...il.com>
To:	ericvh@...il.com, rminnich@...dia.gov, lucho@...kov.net,
	v9fs-developer@...ts.sourceforge.net
Cc:	linux-kernel@...r.kernel.org, kernel-br@...glegroups.com,
	"Geyslan G. Bem" <geyslan@...il.com>
Subject: [PATCH] 9p: unsigned/signed wrap in p9/unix modes.

Changes the sign type to unsigned, avoiding the possibility of
wrap when ORing the p9 or unix bit modes.

Signed-off-by: Geyslan G. Bem <geyslan@...il.com>
---
 fs/9p/vfs_inode.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index b352457..574095e 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -63,7 +63,7 @@ static const struct inode_operations v9fs_symlink_inode_operations;
 
 static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode)
 {
-	int res;
+	u32 res;
 	res = mode & 0777;
 	if (S_ISDIR(mode))
 		res |= P9_DMDIR;
@@ -125,7 +125,7 @@ static int p9mode2perm(struct v9fs_session_info *v9ses,
 static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses,
 			       struct p9_wstat *stat, dev_t *rdev)
 {
-	int res;
+	umode_t res;
 	u32 mode = stat->mode;
 
 	*rdev = 0;
@@ -144,7 +144,7 @@ static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses,
 	else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
 		 && (v9ses->nodev == 0)) {
 		char type = 0, ext[32];
-		int major = -1, minor = -1;
+		u32 major = 0, minor = 0;
 
 		strlcpy(ext, stat->extension, sizeof(ext));
 		sscanf(ext, "%c %u %u", &type, &major, &minor);
-- 
1.8.4

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