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 --- tools/perf/util/comm.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 tools/perf/util/comm.h (limited to 'tools/perf/util/comm.h') diff --git a/tools/perf/util/comm.h b/tools/perf/util/comm.h new file mode 100644 index 000000000..f35d8fbfa --- /dev/null +++ b/tools/perf/util/comm.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __PERF_COMM_H +#define __PERF_COMM_H + +#include +#include +#include + +struct comm_str; + +struct comm { + struct comm_str *comm_str; + u64 start; + struct list_head list; + bool exec; + union { /* Tool specific area */ + void *priv; + u64 db_id; + }; +}; + +void comm__free(struct comm *comm); +struct comm *comm__new(const char *str, u64 timestamp, bool exec); +const char *comm__str(const struct comm *comm); +int comm__override(struct comm *comm, const char *str, u64 timestamp, + bool exec); + +#endif /* __PERF_COMM_H */ -- cgit v1.3.1