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authorSteven Whitehouse <swhiteho@redhat.com>2010-05-24 14:36:48 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2010-05-24 14:36:48 +0100
commit7df0e0397b9a18358573274db9fdab991941062f (patch)
tree2cfad1129b631ade909dc75e32a0ea48f3899a28 /fs/gfs2
parentf72f2d2e2f3238e4dedf4afb5f9945b3227dd87e (diff)
GFS2: Fix permissions checking for setflags ioctl()
We should be checking for the ownership of the file for which flags are being set, rather than just for write access. Reported-by: Dan Rosenberg <dan.j.rosenberg@gmail.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/file.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index e6dd2aec6f82..b20bfcc9fa2d 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -218,6 +218,11 @@ static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
if (error)
goto out_drop_write;
+ error = -EACCES;
+ if (!is_owner_or_cap(inode))
+ goto out;
+
+ error = 0;
flags = ip->i_diskflags;
new_flags = (flags & ~mask) | (reqflags & mask);
if ((new_flags ^ flags) == 0)
@@ -275,8 +280,10 @@ static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
{
struct inode *inode = filp->f_path.dentry->d_inode;
u32 fsflags, gfsflags;
+
if (get_user(fsflags, ptr))
return -EFAULT;
+
gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
if (!S_ISDIR(inode->i_mode)) {
if (gfsflags & GFS2_DIF_INHERIT_JDATA)