+ kcov-support-compat-processes.patch added to -mm tree

+ kcov-support-compat-processes.patch added to -mm tree

[akpm]

The patch titled
     Subject: kcov: support compat processes
has been added to the -mm tree.  Its filename is
     kcov-support-compat-processes.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/kcov-support-compat-processes.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/kcov-support-compat-processes.patch

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------------------------------------------------------
From: Dmitry Vyukov <dvyukov@google.com>
Subject: kcov: support compat processes

Support compat processes in KCOV by providing compat_ioctl callback. 
Compat mode uses the same ioctl callback: we have 2 commands that do not
use the argument and 1 that already checks that the arg does not overflow
INT_MAX.  This allows to use KCOV-guided fuzzing in compat processes.

Link: http://lkml.kernel.org/r/20170823100553.55812-1-dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: <syzkaller@googlegroups.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/kcov.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN kernel/kcov.c~kcov-support-compat-processes kernel/kcov.c
--- a/kernel/kcov.c~kcov-support-compat-processes
+++ a/kernel/kcov.c
@@ -270,6 +270,7 @@ static long kcov_ioctl(struct file *file
 static const struct file_operations kcov_fops = {
 	.open		= kcov_open,
 	.unlocked_ioctl	= kcov_ioctl,
+	.compat_ioctl	= kcov_ioctl,
 	.mmap		= kcov_mmap,
 	.release        = kcov_close,
 };
_

Patches currently in -mm which might be from dvyukov@google.com are

kcov-support-compat-processes.patch