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 --- scripts/package/debian/copyright | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 scripts/package/debian/copyright (limited to 'scripts/package/debian/copyright') diff --git a/scripts/package/debian/copyright b/scripts/package/debian/copyright new file mode 100644 index 000000000..4f1f06221 --- /dev/null +++ b/scripts/package/debian/copyright @@ -0,0 +1,16 @@ +This is a packaged upstream version of the Linux kernel. + +The sources may be found at most Linux archive sites, including: +https://www.kernel.org/pub/linux/kernel + +Copyright: 1991 - 2023 Linus Torvalds and others. + +The git repository for mainline kernel development is at: +git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 dated June, 1991. + +On Debian GNU/Linux systems, the complete text of the GNU General Public +License version 2 can be found in `/usr/share/common-licenses/GPL-2'. -- cgit v1.3.1