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/hid/hid-roccat-lua.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 drivers/hid/hid-roccat-lua.h (limited to 'drivers/hid/hid-roccat-lua.h') diff --git a/drivers/hid/hid-roccat-lua.h b/drivers/hid/hid-roccat-lua.h new file mode 100644 index 000000000..1495e535e --- /dev/null +++ b/drivers/hid/hid-roccat-lua.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __HID_ROCCAT_LUA_H +#define __HID_ROCCAT_LUA_H + +/* + * Copyright (c) 2012 Stefan Achatz + */ + +/* + */ + +#include + +enum { + LUA_SIZE_CONTROL = 8, +}; + +enum lua_commands { + LUA_COMMAND_CONTROL = 3, +}; + +struct lua_device { + struct mutex lua_lock; +}; + +#endif -- cgit v1.3.1