diff mbox series

[4.9,44/91] fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP

Message ID 20200111094901.841255643@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH Jan. 11, 2020, 9:49 a.m. UTC 
From: Al Viro <viro@zeniv.linux.org.uk>

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>

---
 fs/compat_ioctl.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -1585,9 +1585,10 @@  COMPAT_SYSCALL_DEFINE3(ioctl, unsigned i
 #endif
 
 	case FICLONE:
+		goto do_ioctl;
 	case FICLONERANGE:
 	case FIDEDUPERANGE:
-		goto do_ioctl;
+		goto found_handler;
 
 	case FIBMAP:
 	case FIGETBSZ: