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, 43 insertions, 0 deletions

diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
new file mode 100644
index 000000000..689686de0
--- /dev/null
+++ b/drivers/remoteproc/Makefile
@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generic framework for controlling remote processors
+#
+
+obj-$(CONFIG_REMOTEPROC)		+= remoteproc.o
+remoteproc-y				:= remoteproc_core.o
+remoteproc-y				+= remoteproc_coredump.o
+remoteproc-y				+= remoteproc_debugfs.o
+remoteproc-y				+= remoteproc_sysfs.o
+remoteproc-y				+= remoteproc_virtio.o
+remoteproc-y				+= remoteproc_elf_loader.o
+obj-$(CONFIG_REMOTEPROC_CDEV)		+= remoteproc_cdev.o
+obj-$(CONFIG_AMD_MBV_BRAM_REMOTEPROC)	+= amd_mbv_bram_rproc.o
+obj-$(CONFIG_IMX_REMOTEPROC)		+= imx_rproc.o
+obj-$(CONFIG_IMX_DSP_REMOTEPROC)	+= imx_dsp_rproc.o
+obj-$(CONFIG_INGENIC_VPU_RPROC)		+= ingenic_rproc.o
+obj-$(CONFIG_MTK_SCP)			+= mtk_scp.o mtk_scp_ipi.o
+obj-$(CONFIG_OMAP_REMOTEPROC)		+= omap_remoteproc.o
+obj-$(CONFIG_WKUP_M3_RPROC)		+= wkup_m3_rproc.o
+obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o
+obj-$(CONFIG_KEYSTONE_REMOTEPROC)	+= keystone_remoteproc.o
+obj-$(CONFIG_MESON_MX_AO_ARC_REMOTEPROC)+= meson_mx_ao_arc.o
+obj-$(CONFIG_PRU_REMOTEPROC)		+= pru_rproc.o
+obj-$(CONFIG_QCOM_PIL_INFO)		+= qcom_pil_info.o
+obj-$(CONFIG_QCOM_RPROC_COMMON)		+= qcom_common.o
+obj-$(CONFIG_QCOM_Q6V5_COMMON)		+= qcom_q6v5.o
+obj-$(CONFIG_QCOM_Q6V5_ADSP)		+= qcom_q6v5_adsp.o
+obj-$(CONFIG_QCOM_Q6V5_MSS)		+= qcom_q6v5_mss.o
+obj-$(CONFIG_QCOM_Q6V5_PAS)		+= qcom_q6v5_pas.o
+obj-$(CONFIG_QCOM_Q6V5_WCSS)		+= qcom_q6v5_wcss.o
+obj-$(CONFIG_QCOM_SYSMON)		+= qcom_sysmon.o
+obj-$(CONFIG_QCOM_WCNSS_PIL)		+= qcom_wcnss_pil.o
+qcom_wcnss_pil-y			+= qcom_wcnss.o
+qcom_wcnss_pil-y			+= qcom_wcnss_iris.o
+obj-$(CONFIG_RCAR_REMOTEPROC)		+= rcar_rproc.o
+obj-$(CONFIG_ST_REMOTEPROC)		+= st_remoteproc.o
+obj-$(CONFIG_ST_SLIM_REMOTEPROC)	+= st_slim_rproc.o
+obj-$(CONFIG_STM32_RPROC)		+= stm32_rproc.o
+obj-$(CONFIG_TI_K3_DSP_REMOTEPROC)	+= ti_k3_dsp_remoteproc.o ti_k3_common.o
+obj-$(CONFIG_TI_K3_M4_REMOTEPROC)	+= ti_k3_m4_remoteproc.o ti_k3_common.o
+obj-$(CONFIG_TI_K3_R5_REMOTEPROC)	+= ti_k3_r5_remoteproc.o ti_k3_common.o
+obj-$(CONFIG_XLNX_R5_REMOTEPROC)	+= xlnx_r5_remoteproc.o