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fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP

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commit 6b2daec190 upstream.

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

Fixes: d79bdd52d8 ("vfs: wire up compat ioctl for CLONE/CLONE_RANGE")
Fixes: 54dbc15172 ("vfs: hoist the btrfs deduplication ioctl to the vfs")
Fixes: ceac204e1d ("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>
This commit is contained in:
Al Viro
2019-04-21 18:53:50 -04:00
committed by Greg Kroah-Hartman
parent 41e7faf48f
commit 378ebd321f
1 changed files with 2 additions and 1 deletions
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3
fs/compat_ioctl.c
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@@ -1585,9 +1585,10 @@ COMPAT_SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd,
#endif
case FICLONE:
goto do_ioctl;
case FICLONERANGE:
case FIDEDUPERANGE:
goto do_ioctl;
goto found_handler;
case FIBMAP:
case FIGETBSZ: