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/Kconfig | 79 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 drivers/video/logo/Kconfig (limited to 'drivers/video/logo/Kconfig') diff --git a/drivers/video/logo/Kconfig b/drivers/video/logo/Kconfig new file mode 100644 index 000000000..cda15b958 --- /dev/null +++ b/drivers/video/logo/Kconfig @@ -0,0 +1,79 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Logo configuration +# + +menuconfig LOGO + bool "Bootup logo" + depends on FB_CORE || SGI_NEWPORT_CONSOLE + help + Enable and select frame buffer bootup logos. + Monochrome logos will also be used by the DRM panic handler, if + enabled. + +if LOGO + +config FB_LOGO_EXTRA + bool + depends on FB=y + default y if SPU_BASE + +config LOGO_LINUX_MONO + bool "Standard black and white Linux logo" + +config LOGO_LINUX_MONO_FILE + string "Monochrome logo .pbm file" + depends on LOGO_LINUX_MONO + default "drivers/video/logo/logo_superh_mono.pbm" if SUPERH + default "drivers/video/logo/logo_linux_mono.pbm" + help + Takes a path to a monochromatic logo in the portable pixmap file + format (.pbm). This defaults to the Tux penguin. + + For example, the below ImageMagick command can be used to reduce + an image to black and white and convert it into a pbm file: + + magick source_image -compress none destination.pbm + +config LOGO_LINUX_VGA16 + bool "Standard 16-color Linux logo" + +config LOGO_LINUX_VGA16_FILE + string "16-color logo .ppm file" + depends on LOGO_LINUX_VGA16 + default "drivers/video/logo/logo_superh_vga16.ppm" if SUPERH + default "drivers/video/logo/logo_linux_vga16.ppm" + help + Takes a path to a logo in the portable pixmap file format (.ppm), + using the 16 colors from the drivers/video/logo/clut_vga16.ppm + palette. This defaults to the Tux penguin. + + For example, the below ImageMagick command can be used to reduce an + image to the VGA 16 colors palette and convert into a ppm file: + + magick source_image -compress none \ + -remap drivers/video/logo/clut_vga16.ppm destination.ppm + +config LOGO_LINUX_CLUT224 + bool "Standard 224-color Linux logo" + default y + +config LOGO_LINUX_CLUT224_FILE + string "224-color logo .ppm file" + depends on LOGO_LINUX_CLUT224 + default "drivers/video/logo/logo_dec_clut224.ppm" if MACH_DECSTATION || ALPHA + default "drivers/video/logo/logo_parisc_clut224.ppm" if PARISC + default "drivers/video/logo/logo_sgi_clut224.ppm" if SGI_IP22 || SGI_IP27 || SGI_IP32 + default "drivers/video/logo/logo_sun_clut224.ppm" if SPARC + default "drivers/video/logo/logo_superh_clut224.ppm" if SUPERH + default "drivers/video/logo/logo_linux_clut224.ppm" + help + Takes a path to a 224-color logo in the portable pixmap file + format (.ppm). This defaults to the Tux penguin. + + For example, the below ImageMagick command can be used to reduce + an image palette to 224 colors and convert it into a ppm file: + + magick source_image -compress none -colors 224 destination.ppm + +endif # LOGO -- cgit v1.3.1