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From: KaFai Wan <kafai.wan@linux.dev>
To: "Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"John Fastabend" <john.fastabend@gmail.com>,
	"Andrii Nakryiko" <andrii@kernel.org>,
	"Eduard Zingerman" <eddyz87@gmail.com>,
	"Kumar Kartikeya Dwivedi" <memxor@gmail.com>,
	"Martin KaFai Lau" <martin.lau@linux.dev>,
	"Song Liu" <song@kernel.org>,
	"Yonghong Song" <yonghong.song@linux.dev>,
	"Jiri Olsa" <jolsa@kernel.org>,
	"Emil Tsalapatis" <emil@etsalapatis.com>,
	"Ihor Solodrai" <ihor.solodrai@linux.dev>,
	"Shuah Khan" <shuah@kernel.org>,
	"Nathan Chancellor" <nathan@kernel.org>,
	"Nick Desaulniers" <ndesaulniers@google.com>,
	"Bill Wendling" <morbo@google.com>,
	"Justin Stitt" <justinstitt@google.com>,
	"Donggeun Yoo" <donggeunyoo.kernel@gmail.com>,
	"Leon Hwang" <leon.hwang@linux.dev>,
	"KaFai Wan" <kafai.wan@linux.dev>,
	"Menglong Dong" <menglong8.dong@gmail.com>,
	"Mykyta Yatsenko" <yatsenko@meta.com>,
	"Feng Jiang" <jiangfeng@kylinos.cn>,
	"Björn Töpel" <bjorn@kernel.org>,
	"Puranjay Mohan" <puranjay@kernel.org>,
	"Vineet Gupta" <vineet.gupta@linux.dev>,
	"Mykola Lysenko" <mykolal@fb.com>,
	bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-kselftest@vger.kernel.org, llvm@lists.linux.dev
Subject: [PATCH bpf-next v2 3/7] selftests/bpf: Fix stack arg pruning test JOIN log expectation
Date: Wed, 14 Oct 2026 19:30:39 +0800	[thread overview]
Message-ID: <20261014113043.640435-4-kafai.wan@linux.dev> (raw)
In-Reply-To: <20261014113043.640435-1-kafai.wan@linux.dev>

Commit f414d20879ae ("bpf: Save DFS postorder numbers for program
instructions") changed bpf_compute_postorder() to use a real DFS, which
changes the postorder of this test's instructions and thus the insn edge
the arg track join at insn 10 is reported on:

  arg JOIN insn 8 -> 10 r1: _ + fp0-8 => fp0-8|fp0+0
  arg JOIN insn 8 -> 10 sa0: _ + fp0-8 => fp0-8|fp0+0

Update the r1 and sa0 expectations to the new output.

Fixes: f414d20879ae ("bpf: Save DFS postorder numbers for program instructions")
Signed-off-by: KaFai Wan <kafai.wan@linux.dev>
---
 tools/testing/selftests/bpf/progs/verifier_stack_arg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/progs/verifier_stack_arg.c b/tools/testing/selftests/bpf/progs/verifier_stack_arg.c
index f6a4a6aa0e617..b9f799f6e4051 100644
--- a/tools/testing/selftests/bpf/progs/verifier_stack_arg.c
+++ b/tools/testing/selftests/bpf/progs/verifier_stack_arg.c
@@ -117,8 +117,8 @@ SEC("tc")
 __description("stack_arg: pruning with different stack arg types")
 __failure __log_level(2)
 __flag(BPF_F_TEST_STATE_FREQ)
-__msg("arg JOIN insn 9 -> 10 r1: fp0-8 + _ => fp0-8|fp0+0")
-__msg("arg JOIN insn 9 -> 10 sa0: fp0-8 + _ => fp0-8|fp0+0")
+__msg("arg JOIN insn 8 -> 10 r1: _ + fp0-8 => fp0-8|fp0+0")
+__msg("arg JOIN insn 8 -> 10 sa0: _ + fp0-8 => fp0-8|fp0+0")
 __msg("R{{[0-9]}} invalid mem access 'scalar'")
 __naked void stack_arg_pruning_type_mismatch(void)
 {
-- 
2.43.0


  parent reply	other threads:[~2026-10-14 11:32 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-14 11:30 [PATCH bpf-next v2 0/7] selftests/bpf: Fix selftests failures with LLVM 23 KaFai Wan
2026-10-14 11:30 ` [PATCH bpf-next v2 1/7] bpf: Determine freplace staticness from BTF linkage KaFai Wan
2026-10-14 11:30 ` [PATCH bpf-next v2 2/7] selftests/bpf: Fix stack_arg precision backtracking log expectation KaFai Wan
2026-10-14 11:30 ` KaFai Wan [this message]
2026-10-14 11:30 ` [PATCH bpf-next v2 4/7] selftests/bpf: Use _exit() in uprobe_multi_test clone-ed child KaFai Wan
2026-10-14 11:30 ` [PATCH bpf-next v2 5/7] selftests/bpf: Fix prog_tests framework subtest count checks KaFai Wan
2026-10-14 11:30 ` [PATCH bpf-next v2 6/7] selftests/bpf: Skip expected_msgs subtests when stdout is not saved KaFai Wan
2026-10-14 12:08   ` bot+bpf-ci
2026-10-14 15:41     ` KaFai Wan
2026-10-14 11:30 ` [PATCH bpf-next v2 7/7] selftests/bpf: Skip compare_text subtest " KaFai Wan
2026-10-14 12:08   ` bot+bpf-ci
2026-10-14 16:20     ` KaFai Wan

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