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.
Signed-off-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: syzkaller@xxxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kcov.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/kcov.c b/kernel/kcov.c
index cd771993f96f..3f693a0f6f3e 100644
--- a/kernel/kcov.c
+++ b/kernel/kcov.c
@@ -270,6 +270,7 @@ static long kcov_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
static const struct file_operations kcov_fops = {
.open = kcov_open,
.unlocked_ioctl = kcov_ioctl,
+ .compat_ioctl = kcov_ioctl,
.mmap = kcov_mmap,
.release = kcov_close,
};
--
2.14.1.342.g6490525c54-goog
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