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, 30 insertions, 0 deletions

diff --git a/drivers/usb/mtu3/Makefile b/drivers/usb/mtu3/Makefile
new file mode 100644
index 000000000..3bf8cbcc1
--- /dev/null
+++ b/drivers/usb/mtu3/Makefile
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-2.0
+
+ccflags-$(CONFIG_USB_MTU3_DEBUG)	+= -DDEBUG
+
+# define_trace.h needs to know how to find our header
+CFLAGS_mtu3_trace.o	:= -I$(src)
+
+obj-$(CONFIG_USB_MTU3)	+= mtu3.o
+
+mtu3-y	:= mtu3_plat.o
+
+ifneq ($(CONFIG_TRACING),)
+	mtu3-y	+= mtu3_trace.o
+endif
+
+ifneq ($(filter y,$(CONFIG_USB_MTU3_HOST) $(CONFIG_USB_MTU3_DUAL_ROLE)),)
+	mtu3-y	+= mtu3_host.o
+endif
+
+ifneq ($(filter y,$(CONFIG_USB_MTU3_GADGET) $(CONFIG_USB_MTU3_DUAL_ROLE)),)
+	mtu3-y	+= mtu3_core.o mtu3_gadget_ep0.o mtu3_gadget.o mtu3_qmu.o
+endif
+
+ifneq ($(CONFIG_USB_MTU3_DUAL_ROLE),)
+	mtu3-y	+= mtu3_dr.o
+endif
+
+ifneq ($(CONFIG_DEBUG_FS),)
+	mtu3-y	+= mtu3_debugfs.o
+endif