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/s390/crypto/Makefile b/drivers/s390/crypto/Makefile
new file mode 100644
index 000000000..e83c6603c
--- /dev/null
+++ b/drivers/s390/crypto/Makefile
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# S/390 crypto devices
+#
+
+ap-objs := ap_bus.o ap_card.o ap_queue.o
+obj-$(CONFIG_AP) += ap.o
+# zcrypt_api.o and zcrypt_msgtype*.o depend on ap.o
+zcrypt-objs := zcrypt_api.o zcrypt_card.o zcrypt_queue.o
+zcrypt-objs += zcrypt_msgtype6.o zcrypt_msgtype50.o
+zcrypt-objs += zcrypt_ccamisc.o zcrypt_ep11misc.o
+obj-$(CONFIG_ZCRYPT) += zcrypt.o
+# adapter drivers depend on ap.o and zcrypt.o
+obj-$(CONFIG_ZCRYPT) += zcrypt_cex4.o
+
+# pkey base and api module
+pkey-objs := pkey_base.o pkey_api.o pkey_sysfs.o
+obj-$(CONFIG_PKEY) += pkey.o
+
+# pkey cca handler module
+pkey-cca-objs := pkey_cca.o
+obj-$(CONFIG_PKEY_CCA) += pkey-cca.o
+
+# pkey ep11 handler module
+pkey-ep11-objs := pkey_ep11.o
+obj-$(CONFIG_PKEY_EP11) += pkey-ep11.o
+
+# pkey pckmo handler module
+pkey-pckmo-objs := pkey_pckmo.o
+obj-$(CONFIG_PKEY_PCKMO) += pkey-pckmo.o
+
+# pkey uv handler module
+pkey-uv-objs := pkey_uv.o
+obj-$(CONFIG_PKEY_UV) += pkey-uv.o
+
+# adjunct processor matrix
+vfio_ap-objs := vfio_ap_drv.o vfio_ap_ops.o
+obj-$(CONFIG_VFIO_AP) += vfio_ap.o