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ceph: fix compat_ioctl for ceph_dir_operations

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The ceph_ioctl function is used both for files and directories, but only
the files support doing that in 32-bit compat mode.

On the s390 architecture, there is also a problem with invalid 31-bit
pointers that need to be passed through compat_ptr().

Use the new compat_ptr_ioctl() to address both issues.

Note: When backporting this patch to stable kernels, "compat_ioctl:
add compat_ptr_ioctl()" is needed as well.

Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2018-09-11 20:47:23 +02:00
parent 37ecf8b20a
commit 18bd6caaef
2 changed files with 2 additions and 1 deletions
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1
fs/ceph/dir.c
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@ -1808,6 +1808,7 @@ const struct file_operations ceph_dir_fops = {
.open = ceph_open,
.release = ceph_release,
.unlocked_ioctl = ceph_ioctl,
.compat_ioctl = compat_ptr_ioctl,
.fsync = ceph_fsync,
.lock = ceph_lock,
.flock = ceph_flock,

2
fs/ceph/file.c
View File

@ -2162,7 +2162,7 @@ const struct file_operations ceph_file_fops = {
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.unlocked_ioctl = ceph_ioctl,
.compat_ioctl = ceph_ioctl,
.compat_ioctl = compat_ptr_ioctl,
.fallocate = ceph_fallocate,
.copy_file_range = ceph_copy_file_range,
};