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| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 10:43:19 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 07:58:36 -0700 |
| commit | 6668ed271eaefaa63e686bdfbedaeb7b8e492722 (patch) | |
| tree | 58e8288fead484f6755ad0815fc74c3742663761 /arch/microblaze/boot/Makefile | |
| download | linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.tar.gz linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.zip | |
selftests/bpf: Reject graph kptr use after RCU unlockgrafted
Add a sleepable verifier test that loads a graph-node local kptr in an
explicit RCU read-side critical section, then passes its node to
bpf_rbtree_remove() after the section ends.
Before the verifier fix, the stale NON_OWN_REF flag makes the node look like
a live borrowed reference and the program is accepted. After the fix, the
pointer is demoted without NON_OWN_REF and the graph kfunc argument is
rejected.
Also exercise a graph kptr loaded while a spin lock provides implicit RCU
protection. The pointer must be invalidated when the lock is released, which
guards the required ordering between non-owning-reference invalidation and
RCU demotion.
Update the existing fault-protected load test state description. The
post-unlock pointer no longer carries NON_OWN_REF, but remains readable
because the load is rewritten to use BPF_PROBE_MEM.
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'arch/microblaze/boot/Makefile')
| -rw-r--r-- | arch/microblaze/boot/Makefile | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/microblaze/boot/Makefile b/arch/microblaze/boot/Makefile new file mode 100644 index 000000000..2b42c370d --- /dev/null +++ b/arch/microblaze/boot/Makefile @@ -0,0 +1,35 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# arch/microblaze/boot/Makefile +# + +targets := linux.bin linux.bin.gz linux.bin.ub simpleImage.* + +OBJCOPYFLAGS := -R .note -R .comment -R .note.gnu.build-id -O binary + +$(obj)/linux.bin: vmlinux FORCE + $(call if_changed,objcopy) + +$(obj)/linux.bin.ub: $(obj)/linux.bin FORCE + $(call if_changed,uimage) + +$(obj)/linux.bin.gz: $(obj)/linux.bin FORCE + $(call if_changed,gzip) + +quiet_cmd_strip = STRIP $< $@$2 + cmd_strip = $(STRIP) -K microblaze_start -K _end -K __log_buf \ + -K _fdt_start $< -o $@$2 + +UIMAGE_LOADADDR = $(CONFIG_KERNEL_BASE_ADDR) + +$(obj)/simpleImage.$(DTB): vmlinux FORCE + $(call if_changed,objcopy) + +$(obj)/simpleImage.$(DTB).ub: $(obj)/simpleImage.$(DTB) FORCE + $(call if_changed,uimage) + +$(obj)/simpleImage.$(DTB).unstrip: vmlinux FORCE + $(call if_changed,copy) + +$(obj)/simpleImage.$(DTB).strip: vmlinux FORCE + $(call if_changed,strip) |