From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- Documentation/features/arch-support.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 Documentation/features/arch-support.txt (limited to 'Documentation/features/arch-support.txt') diff --git a/Documentation/features/arch-support.txt b/Documentation/features/arch-support.txt new file mode 100644 index 000000000..118ae0318 --- /dev/null +++ b/Documentation/features/arch-support.txt @@ -0,0 +1,12 @@ + +For generic kernel features that need architecture support, the +arch-support.txt file in each feature directory shows the arch +support matrix, for all upstream Linux architectures. + +The meaning of entries in the tables is: + + | ok | # feature supported by the architecture + |TODO| # feature not yet supported by the architecture + | .. | # feature cannot be supported by the hardware + | N/A| # feature doesn't apply to the architecture + -- cgit v1.3.1