From: Josef Bacik <jbacik@fb.com>
Date: Fri, 25 Mar 2016 14:02:41 +0000 (-0400)
Subject: Btrfs: don't use src fd for printk
X-Git-Tag: v4.1.12-92~15^2~50
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=41e5852e3617fbbb258ea4292e288f6299cba7d7;p=users%2Fjedix%2Flinux-maple.git

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 5189d54417ab3..be1878fc318f6 100644
--- 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)) {