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/refcount.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 rust/helpers/refcount.c (limited to 'rust/helpers/refcount.c') diff --git a/rust/helpers/refcount.c b/rust/helpers/refcount.c new file mode 100644 index 000000000..36334a674 --- /dev/null +++ b/rust/helpers/refcount.c @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include + +__rust_helper refcount_t rust_helper_REFCOUNT_INIT(int n) +{ + return (refcount_t)REFCOUNT_INIT(n); +} + +__rust_helper void rust_helper_refcount_set(refcount_t *r, int n) +{ + refcount_set(r, n); +} + +__rust_helper void rust_helper_refcount_inc(refcount_t *r) +{ + refcount_inc(r); +} + +__rust_helper void rust_helper_refcount_dec(refcount_t *r) +{ + refcount_dec(r); +} + +__rust_helper bool rust_helper_refcount_dec_and_test(refcount_t *r) +{ + return refcount_dec_and_test(r); +} -- cgit v1.3.1