From: Miklos Szeredi <mszeredi@suse.cz>
Date: Tue, 1 Oct 2013 14:41:23 +0000 (+0200)
Subject: fuse: no RCU mode in fuse_access()
X-Git-Tag: MMI-PSA29.97-13-9~13305^2~14
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=698fa1d163c560343b8012a0a916440d076b6c8a;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

fuse: no RCU mode in fuse_access()

fuse_access() is never called in RCU walk, only on the final component of
access(2) and chdir(2)...

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
---

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index a75159846a75..b7989f2ab4c4 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1068,6 +1068,8 @@ static int fuse_access(struct inode *inode, int mask)
 	struct fuse_access_in inarg;
 	int err;
 
+	BUG_ON(mask & MAY_NOT_BLOCK);
+
 	if (fc->no_access)
 		return 0;
 
@@ -1155,9 +1157,6 @@ static int fuse_permission(struct inode *inode, int mask)
 		   noticed immediately, only after the attribute
 		   timeout has expired */
 	} else if (mask & (MAY_ACCESS | MAY_CHDIR)) {
-		if (mask & MAY_NOT_BLOCK)
-			return -ECHILD;
-
 		err = fuse_access(inode, mask);
 	} else if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode)) {
 		if (!(inode->i_mode & S_IXUGO)) {