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, 35 insertions, 0 deletions

diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig
new file mode 100644
index 000000000..a2d65adff
--- /dev/null
+++ b/drivers/soc/Kconfig
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menu "SOC (System On Chip) specific Drivers"
+
+source "drivers/soc/amlogic/Kconfig"
+source "drivers/soc/apple/Kconfig"
+source "drivers/soc/aspeed/Kconfig"
+source "drivers/soc/atmel/Kconfig"
+source "drivers/soc/bcm/Kconfig"
+source "drivers/soc/canaan/Kconfig"
+source "drivers/soc/cirrus/Kconfig"
+source "drivers/soc/fsl/Kconfig"
+source "drivers/soc/fujitsu/Kconfig"
+source "drivers/soc/hisilicon/Kconfig"
+source "drivers/soc/imx/Kconfig"
+source "drivers/soc/ixp4xx/Kconfig"
+source "drivers/soc/litex/Kconfig"
+source "drivers/soc/loongson/Kconfig"
+source "drivers/soc/mediatek/Kconfig"
+source "drivers/soc/microchip/Kconfig"
+source "drivers/soc/nuvoton/Kconfig"
+source "drivers/soc/pxa/Kconfig"
+source "drivers/soc/qcom/Kconfig"
+source "drivers/soc/renesas/Kconfig"
+source "drivers/soc/rockchip/Kconfig"
+source "drivers/soc/samsung/Kconfig"
+source "drivers/soc/sophgo/Kconfig"
+source "drivers/soc/sunxi/Kconfig"
+source "drivers/soc/tegra/Kconfig"
+source "drivers/soc/ti/Kconfig"
+source "drivers/soc/ux500/Kconfig"
+source "drivers/soc/versatile/Kconfig"
+source "drivers/soc/vt8500/Kconfig"
+source "drivers/soc/xilinx/Kconfig"
+
+endmenu