linux-kernel - [PATCH for v4.9 LTS 13/86] ubifs: allow encryption ioctls in compat mode

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Date:   Sat, 17 Jun 2017 22:24:31 +0000
From:   "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     Eric Biggers <ebiggers@...gle.com>,
        Richard Weinberger <richard@....at>,
        "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Subject: [PATCH for v4.9 LTS 13/86] ubifs: allow encryption ioctls in compat
 mode

From: Eric Biggers <ebiggers@...gle.com>

[ Upstream commit a75467d910135905de60b3af3f11b3693625781e ]

The ubifs encryption ioctls did not work when called by a 32-bit program
on a 64-bit kernel.  Since 'struct fscrypt_policy' is not affected by
the word size, ubifs just needs to allow these ioctls through, like what
ext4 and f2fs do.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
Signed-off-by: Richard Weinberger <richard@....at>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 fs/ubifs/ioctl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
index 3c7b29de0ca7..49d6c0f89c50 100644
--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -197,6 +197,9 @@ long ubifs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	case FS_IOC32_SETFLAGS:
 		cmd = FS_IOC_SETFLAGS;
 		break;
+	case FS_IOC_SET_ENCRYPTION_POLICY:
+	case FS_IOC_GET_ENCRYPTION_POLICY:
+		break;
 	default:
 		return -ENOIOCTLCMD;
 	}
-- 
2.11.0