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, 38 insertions, 0 deletions

diff --git a/drivers/soundwire/Makefile b/drivers/soundwire/Makefile
new file mode 100644
index 000000000..e80a2c2cf
--- /dev/null
+++ b/drivers/soundwire/Makefile
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for soundwire core
+#
+
+#Bus Objs
+soundwire-bus-y := bus_type.o bus.o master.o slave.o mipi_disco.o stream.o  \
+			sysfs_slave.o sysfs_slave_dpn.o
+obj-$(CONFIG_SOUNDWIRE) += soundwire-bus.o
+
+soundwire-generic-allocation-objs := generic_bandwidth_allocation.o
+obj-$(CONFIG_SOUNDWIRE_GENERIC_ALLOCATION) += soundwire-generic-allocation.o
+
+ifdef CONFIG_DEBUG_FS
+soundwire-bus-y += debugfs.o
+endif
+
+ifdef CONFIG_IRQ_DOMAIN
+soundwire-bus-y += irq.o
+endif
+
+#AMD driver
+soundwire-amd-y := amd_init.o amd_manager.o
+obj-$(CONFIG_SOUNDWIRE_AMD) += soundwire-amd.o
+
+#Cadence Objs
+soundwire-cadence-y := cadence_master.o
+obj-$(CONFIG_SOUNDWIRE_CADENCE) += soundwire-cadence.o
+
+#Intel driver
+soundwire-intel-y :=	intel.o intel_ace2x.o intel_ace2x_debugfs.o \
+			intel_auxdevice.o intel_init.o dmi-quirks.o \
+			intel_bus_common.o
+obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel.o
+
+#Qualcomm driver
+soundwire-qcom-y :=	qcom.o
+obj-$(CONFIG_SOUNDWIRE_QCOM) += soundwire-qcom.o