From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 21 Apr 2019 22:53:50 +0000 (-0400)
Subject: fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP
X-Git-Tag: v5.4.9~20
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d536e814a36cc81a53cba83350ffc536c788a8de;p=thirdparty%2Fkernel%2Fstable.git

fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP

commit 6b2daec19094a90435abe67d16fb43b1a5527254 upstream.

Unlike FICLONE, all of those take a pointer argument; they do need
compat_ptr() applied to arg.

Fixes: d79bdd52d8be ("vfs: wire up compat ioctl for CLONE/CLONE_RANGE")
Fixes: 54dbc1517237 ("vfs: hoist the btrfs deduplication ioctl to the vfs")
Fixes: ceac204e1da9 ("fs: make fiemap work from compat_ioctl")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index a7ec2d3dff928..e0226b2138d64 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -1032,10 +1032,11 @@ COMPAT_SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd,
 #endif
 
 	case FICLONE:
+		goto do_ioctl;
 	case FICLONERANGE:
 	case FIDEDUPERANGE:
 	case FS_IOC_FIEMAP:
-		goto do_ioctl;
+		goto found_handler;
 
 	case FIBMAP:
 	case FIGETBSZ: