From 836b2fe544a5e9b5ce116622cb36fba33838c6fd Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 01:33:23 -0700 Subject: selftests/bpf: Check that JMP32 pointer vs zero jumps are not predicted Add jmp32_ptr_vs_zero_jne: the fall-through of the 32-bit compare, which the verifier used to skip, contains an out of bounds map value access, hence w/o the previous patch the program is accepted. See previous patch for detailed description. Reported-by: Nicholas Carlini Suggested-by: Nicholas Carlini Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/bpf/20260904083325.2083493-6-eddyz87@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- rust/helpers/page.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 rust/helpers/page.c (limited to 'rust/helpers/page.c') diff --git a/rust/helpers/page.c b/rust/helpers/page.c new file mode 100644 index 000000000..f8463fbed --- /dev/null +++ b/rust/helpers/page.c @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include + +__rust_helper struct page *rust_helper_alloc_pages(gfp_t gfp_mask, + unsigned int order) +{ + return alloc_pages(gfp_mask, order); +} + +__rust_helper void *rust_helper_kmap_local_page(struct page *page) +{ + return kmap_local_page(page); +} + +__rust_helper void rust_helper_kunmap_local(const void *addr) +{ + kunmap_local(addr); +} + +#ifndef NODE_NOT_IN_PAGE_FLAGS +__rust_helper int rust_helper_page_to_nid(const struct page *page) +{ + return page_to_nid(page); +} +#endif -- cgit v1.3.1