From: Dmitry Vyukov <dvyukov@xxxxxxxxxx> 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@xxxxxxxxxx Signed-off-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Cc: <syzkaller@xxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- 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, }; _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
