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authorLinus Torvalds <torvalds@linux-foundation.org>2010-05-15 12:55:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-15 12:55:31 -0700
commit18e41da89d55014d25b9a24502ee92b7f50599f9 (patch)
tree5ce8ebd7456f377e4cfbff0ae83e84295617a4a8
parent43aa7ac736a4e21aae4882bd8f7c67403aed45b8 (diff)
parent5dc6416414fb3ec6e2825fd4d20c8bf1d7fe0395 (diff)
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
-rw-r--r--fs/btrfs/ioctl.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index e84ef60ffe35..97a97839a867 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -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;

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