bpf: mark a NULL kfunc argument precisegrafted

check_kfunc_arg() allows bpf_register_is_null() for nullable arguments
w/o marking the underlying scalar register precise. Hence a checkpoint
created on such a path would prune against arbitrary scalar value.

Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)")
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/video/fbdev/vt8500lcdfb.h b/drivers/video/fbdev/vt8500lcdfb.h
new file mode 100644
index 000000000..7808f8475
--- /dev/null
+++ b/drivers/video/fbdev/vt8500lcdfb.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  linux/drivers/video/vt8500lcdfb.h
+ *
+ *  Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
+ */
+
+struct vt8500lcd_info {
+	struct fb_info		fb;
+	void __iomem		*regbase;
+	void __iomem		*palette_cpu;
+	dma_addr_t		palette_phys;
+	size_t			palette_size;
+	wait_queue_head_t	wait;
+};
+
+static int bpp_values[] = {
+	1,
+	2,
+	4,
+	8,
+	12,
+	16,
+	18,
+	24,
+};