Btrfs: don't use src fd for printk

Orabug: 25308088

[ Upstream commit c79b4713304f812d3d6c95826fc3e5fc2c0b0c14 ]

The fd we pass in may not be on a btrfs file system, so don't try to do
BTRFS_I() on it.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
(cherry picked from commit ec2744d3c8e70f1beedeaa361dd8b162017a12e7)
Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 5189d54417ab3ec896b8e674bdd9d4350fb14e9e..be1878fc318f6a98344f0ed32ddd8ad3df1c7475 100644 (file)
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1639,7 +1639,7 @@ static noinline int btrfs_ioctl_snap_create_transid(struct file *file,
 
                src_inode = file_inode(src.file);
                if (src_inode->i_sb != file_inode(file)->i_sb) {
-                       btrfs_info(BTRFS_I(src_inode)->root->fs_info,
+                       btrfs_info(BTRFS_I(file_inode(file))->root->fs_info,
                                   "Snapshot src from another FS");
                        ret = -EXDEV;
                } else if (!inode_owner_or_capable(src_inode)) {