Re: [PATCH] Btrfs: don't use src fd for printk

[Ben Hutchings <ben@decadent.org.uk>]

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On Tue, 2016-05-17 at 09:36 -0400, Jeff Mahoney wrote:
> From: Josef Bacik <jbacik@fb.com>
> 
> [ 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>
> Cc: stable@vger.kernel.org # 3.14+

Belatedly queued up for 3.16, thanks.

Ben.

> ---
>  fs/btrfs/ioctl.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
> index 053e677..21423dd 100644
> --- a/fs/btrfs/ioctl.c
> +++ b/fs/btrfs/ioctl.c
> @@ -1654,7 +1654,7 @@ 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)) {
> 
> 
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-- 
Ben Hutchings
compatible: Gracefully accepts erroneous data from any source


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