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OpenCloudOS-Kernel
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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable 

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: check for read permission on src file in the clone ioctl
This commit is contained in:
Linus Torvalds 2010-05-15 12:55:31 -07:00
parent 43aa7ac736 5dc6416414
commit 18e41da89d
1 changed files with 5 additions and 0 deletions
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5
fs/btrfs/ioctl.c
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@ -1481,12 +1481,17 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
ret = -EBADF;
goto out_drop_write;
}
src = src_file->f_dentry->d_inode;
ret = -EINVAL;
if (src == inode)
goto out_fput;
/* the src must be open for reading */
if (!(src_file->f_mode & FMODE_READ))
goto out_fput;
ret = -EISDIR;
if (S_ISDIR(src->i_mode) || S_ISDIR(inode->i_mode))
goto out_fput;