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 --- samples/rust/Kconfig | 193 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 193 insertions(+) create mode 100644 samples/rust/Kconfig (limited to 'samples/rust/Kconfig') diff --git a/samples/rust/Kconfig b/samples/rust/Kconfig new file mode 100644 index 000000000..31d62533e --- /dev/null +++ b/samples/rust/Kconfig @@ -0,0 +1,193 @@ +# SPDX-License-Identifier: GPL-2.0 + +menuconfig SAMPLES_RUST + bool "Rust samples" + depends on RUST + help + You can build sample Rust kernel code here. + + If unsure, say N. + +if SAMPLES_RUST + +config SAMPLE_RUST_CONFIGFS + tristate "Configfs sample" + depends on CONFIGFS_FS + help + This option builds the Rust configfs sample. + + To compile this as a module, choose M here: + the module will be called rust_configfs. + + If unsure, say N. + +config SAMPLE_RUST_MINIMAL + tristate "Minimal" + help + This option builds the Rust minimal module sample. + + To compile this as a module, choose M here: + the module will be called rust_minimal. + + If unsure, say N. + +config SAMPLE_RUST_MISC_DEVICE + tristate "Misc device" + help + This option builds the Rust misc device. + + To compile this as a module, choose M here: + the module will be called rust_misc_device. + + If unsure, say N. + +config SAMPLE_RUST_PRINT + tristate "Printing macros" + help + This option builds the Rust printing macros sample. + + To compile this as a module, choose M here: + the module will be called rust_print. + + If unsure, say N. + +config SAMPLE_RUST_DMA + tristate "DMA Test Driver" + depends on PCI + help + This option builds the Rust DMA Test driver sample. + + To compile this as a module, choose M here: + the module will be called rust_dma. + + If unsure, say N. + +config SAMPLE_RUST_DEBUGFS + tristate "DebugFS Test Module" + depends on DEBUG_FS + help + This option builds the Rust DebugFS Test module sample. + + To compile this as a module, choose M here: + the module will be called rust_debugfs. + + If unsure, say N. + +config SAMPLE_RUST_DEBUGFS_SCOPED + tristate "Scoped DebugFS Test Module" + depends on DEBUG_FS + help + This option builds the Rust Scoped DebugFS Test module sample. + + To compile this as a module, choose M here: + the module will be called rust_debugfs_scoped. + + If unsure, say N. + +config SAMPLE_RUST_DRIVER_I2C + tristate "I2C Driver" + depends on I2C=y + help + This option builds the Rust I2C driver sample. + + To compile this as a module, choose M here: + the module will be called rust_driver_i2c. + + If unsure, say N. + +config SAMPLE_RUST_I2C_CLIENT + tristate "I2C Client Registration" + depends on I2C=y + help + This option builds the Rust I2C client manual creation + sample. + + To compile this as a module, choose M here: + the module will be called rust_i2c_client. + + If unsure, say N. + +config SAMPLE_RUST_DRIVER_PCI + tristate "PCI Driver" + depends on PCI + help + This option builds the Rust PCI driver sample. + + To compile this as a module, choose M here: + the module will be called rust_driver_pci. + + If unsure, say N. + +config SAMPLE_RUST_DRIVER_PLATFORM + tristate "Platform Driver" + help + This option builds the Rust Platform driver sample. + + To compile this as a module, choose M here: + the module will be called rust_driver_platform. + + If unsure, say N. + +config SAMPLE_RUST_DRIVER_USB + tristate "USB Driver" + depends on USB = y + help + This option builds the Rust USB driver sample. + + To compile this as a module, choose M here: + the module will be called rust_driver_usb. + + If unsure, say N. + +config SAMPLE_RUST_DRIVER_FAUX + tristate "Faux Driver" + help + This option builds the Rust Faux driver sample. + + To compile this as a module, choose M here: + the module will be called rust_driver_faux. + + If unsure, say N. + +config SAMPLE_RUST_DRIVER_AUXILIARY + tristate "Auxiliary Driver" + depends on PCI + select AUXILIARY_BUS + help + This option builds the Rust auxiliary driver sample. + + To compile this as a module, choose M here: + the module will be called rust_driver_auxiliary. + + If unsure, say N. + +config SAMPLE_RUST_DRIVER_SERDEV + tristate "Serial Device Bus Device Driver" + select RUST_SERIAL_DEV_BUS_ABSTRACTIONS + help + This option builds the Rust serial device bus driver sample. + + To compile this as a module, choose M here: + the module will be called rust_driver_serdev. + + If unsure, say N. + +config SAMPLE_RUST_SOC + tristate "SoC Driver" + select SOC_BUS + help + This option builds the Rust SoC driver sample. + + To compile this as a module, choose M here: + the module will be called rust_soc. + + If unsure, say N. + +config SAMPLE_RUST_HOSTPROGS + bool "Host programs" + help + This option builds the Rust host program samples. + + If unsure, say N. + +endif # SAMPLES_RUST -- cgit v1.3.1