From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock 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 Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/video/logo/Makefile | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 drivers/video/logo/Makefile (limited to 'drivers/video/logo/Makefile') diff --git a/drivers/video/logo/Makefile b/drivers/video/logo/Makefile new file mode 100644 index 000000000..937b37d3b --- /dev/null +++ b/drivers/video/logo/Makefile @@ -0,0 +1,32 @@ +# SPDX-License-Identifier: GPL-2.0 +# Makefile for the Linux logos + +obj-$(CONFIG_LOGO) += logo.o +obj-$(CONFIG_LOGO_LINUX_MONO) += logo_linux_mono.o +obj-$(CONFIG_LOGO_LINUX_VGA16) += logo_linux_vga16.o +obj-$(CONFIG_LOGO_LINUX_CLUT224) += logo_linux_clut224.o + +obj-$(CONFIG_SPU_BASE) += logo_spe_clut224.o + +# How to generate logo's + +hostprogs := pnmtologo + +# Create commands like "pnmtologo -t mono -n logo_linux_mono -o ..." +quiet_cmd_logo = LOGO $@ + cmd_logo = $(obj)/pnmtologo -t $2 -n $(basename $(notdir $@)) -o $@ $< + +$(obj)/logo_linux_mono.c: $(CONFIG_LOGO_LINUX_MONO_FILE) $(obj)/pnmtologo FORCE + $(call if_changed,logo,mono) + +$(obj)/logo_linux_vga16.c: $(CONFIG_LOGO_LINUX_VGA16_FILE) $(obj)/pnmtologo FORCE + $(call if_changed,logo,vga16) + +$(obj)/logo_linux_clut224.c: $(CONFIG_LOGO_LINUX_CLUT224_FILE) $(obj)/pnmtologo FORCE + $(call if_changed,logo,clut224) + +$(obj)/%_clut224.c: $(src)/%_clut224.ppm $(obj)/pnmtologo FORCE + $(call if_changed,logo,clut224) + +# generated C files +targets += *_mono.c *_vga16.c *_clut224.c -- cgit v1.3.1