selftests/bpf: Test packet range of pointers sharing an idgrafted

Add tests where two packet pointers share an id and tightening one
pointer's umax from its var_off would put it less than their constant
distance from the other's umax: with an index & 0x38 capped at 50, the
base pointer keeps umax 50, so the pointer 8 bytes further on must keep
umax 58, even though its known bits allow at most 56.

These refused a valid program or accepted an out-of-bounds access before
the fix:

- check the advanced copy, load through the base: valid, was refused;
- check the base, load the byte at base + 1 through a copy advanced by
  8: was accepted;
- check base + 4, load 4 bytes at base + 2 through base + 8: reads two
  bytes past the checked range, was accepted;
- the same as the second with data_meta pointers checked against data:
  was accepted.

These pass with and without the fix and cover nearby paths:

- subtract an unknown scalar from a checked pointer and load below it
  (the range is kept across a new id);
- reach a load through two paths whose checks cover 8 and 7 bytes after
  the loaded pointer; the second path must not be pruned by the first;
- spill a copy of a pointer, check the pointer, fill the copy and load
  one byte past the checked range: the load is refused, and the copy
  has the range of the check.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20261001145255.855630-2-alexei.starovoitov@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>

1 files changed, 67 insertions, 0 deletions

diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
new file mode 100644
index 000000000..eecbd631f
--- /dev/null
+++ b/drivers/usb/Makefile
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the kernel USB device drivers.
+#
+
+# Object files in subdirectories
+
+obj-$(CONFIG_USB_COMMON)	+= common/
+obj-$(CONFIG_USB)		+= core/
+obj-$(CONFIG_USB_SUPPORT)	+= phy/
+
+obj-$(CONFIG_USB_DWC3)		+= dwc3/
+obj-$(CONFIG_USB_DWC2)		+= dwc2/
+obj-$(CONFIG_USB_ISP1760)	+= isp1760/
+
+obj-$(CONFIG_USB_CDNS_SUPPORT)	+= cdns3/
+
+obj-$(CONFIG_USB_FOTG210)	+= fotg210/
+
+obj-$(CONFIG_USB_MON)		+= mon/
+obj-$(CONFIG_USB_MTU3)		+= mtu3/
+
+obj-$(CONFIG_USB_PCI)		+= host/
+obj-$(CONFIG_USB_EHCI_HCD)	+= host/
+obj-$(CONFIG_USB_ISP116X_HCD)	+= host/
+obj-$(CONFIG_USB_OHCI_HCD)	+= host/
+obj-$(CONFIG_USB_UHCI_HCD)	+= host/
+obj-$(CONFIG_USB_FHCI_HCD)	+= host/
+obj-$(CONFIG_USB_XHCI_HCD)	+= host/
+obj-$(CONFIG_USB_SL811_HCD)	+= host/
+obj-$(CONFIG_USB_R8A66597_HCD)	+= host/
+obj-$(CONFIG_USB_FSL_USB2)	+= host/
+obj-$(CONFIG_USB_FOTG210_HCD)	+= host/
+obj-$(CONFIG_USB_MAX3421_HCD)	+= host/
+obj-$(CONFIG_USB_XEN_HCD)	+= host/
+
+obj-$(CONFIG_USB_C67X00_HCD)	+= c67x00/
+
+obj-$(CONFIG_USB_ACM)		+= class/
+obj-$(CONFIG_USB_PRINTER)	+= class/
+obj-$(CONFIG_USB_WDM)		+= class/
+obj-$(CONFIG_USB_TMC)		+= class/
+
+obj-$(CONFIG_USB_STORAGE)	+= storage/
+obj-$(CONFIG_USB)		+= storage/
+
+obj-$(CONFIG_USB_MDC800)	+= image/
+obj-$(CONFIG_USB_MICROTEK)	+= image/
+
+obj-$(CONFIG_USB_SERIAL)	+= serial/
+
+obj-$(CONFIG_USB)		+= misc/
+obj-$(CONFIG_EARLY_PRINTK_USB)	+= early/
+
+obj-$(CONFIG_USB_ATM)		+= atm/
+obj-$(CONFIG_USB_SPEEDTOUCH)	+= atm/
+
+obj-$(CONFIG_USB_MUSB_HDRC)	+= musb/
+obj-$(CONFIG_USB_CHIPIDEA)	+= chipidea/
+obj-$(CONFIG_USB_RENESAS_USBHS)	+= renesas_usbhs/
+obj-$(CONFIG_USB_GADGET)	+= gadget/
+
+obj-$(CONFIG_USBIP_CORE)	+= usbip/
+
+obj-$(CONFIG_TYPEC)		+= typec/
+
+obj-$(CONFIG_USB_ROLE_SWITCH)	+= roles/