From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D80CC3016E9 for ; Fri, 2 Jan 2026 18:01:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767376885; cv=none; b=DNmIUxOwYGEoAlCdfvfZ9Pm12G2S3MJ7m8re7F1ZfBsrWWyJr2CRC3mWfQXI3jIbkIpQ+lNfqtTq0LQsmONjHTVB0/X/TUiUqlVwQak7Oa516JdcA7/92cChWnmL6bQeMbrmVM03Y7zegUIwIzhcaJjykpEsT4pLRyjPglyeqN8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767376885; c=relaxed/simple; bh=Wc1IlG0wdf21IP+2GGjryyEp+JEv1L24zURRuAc8HdA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OT7RqN+ZhyGvSIGCxVpb4pS8Tr4EdyZFRbcsvNfb0YrsUGWx6lpRB8UrADFC9gds9899xPRwkHCcA7Hmbi319bzQl9qM/sqTq0lh1+ALgo8mUTzfVgc8bhhzWs+pH2j8dnGC8ymQBtpd4br2uOGx7HYGnIEF+qLj9xwp2LBJoas= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SK41j+Xr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SK41j+Xr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5385DC116D0; Fri, 2 Jan 2026 18:01:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767376885; bh=Wc1IlG0wdf21IP+2GGjryyEp+JEv1L24zURRuAc8HdA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SK41j+Xr5m+5cv7sdW4MaowSP3rkAWq5/NbCpk2CBSp/3wricWlA829IHLj4m6MRi FMSyEXCt6Db+Y3wxyBCkU4CwofyM1SYq59Ram6icxhpQLD/MW1moxIAfYYd44Y24Ld ZDGhSVOWmUWZ5MMCjCzG6sHmJleEMy1S3vi1O/U4MkRrx9vzubrah6YJ3714nkiPIO YP3XXfLftaWMjIHIfRrQDIfWv/EDpLUlXJulIImWtxyQTrTfrL+TM95Du1k5TbEr1l c00adHyQ2BU/m/EO5s2w9Jx6uYarGiUnfckWuNzcj9OLe9TNYIYYgP1XF0rB6iSIjd dBNoLxnViuxrw== From: Puranjay Mohan To: bpf@vger.kernel.org Cc: Puranjay Mohan , Puranjay Mohan , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Martin KaFai Lau , Eduard Zingerman , Kumar Kartikeya Dwivedi , "Emil Tsalapatis" , kernel-team@meta.com Subject: [PATCH bpf-next v3 08/10] selftests: bpf: fix test_kfunc_dynptr_param Date: Fri, 2 Jan 2026 10:00:34 -0800 Message-ID: <20260102180038.2708325-9-puranjay@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260102180038.2708325-1-puranjay@kernel.org> References: <20260102180038.2708325-1-puranjay@kernel.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit As verifier now assumes that all kfuncs only takes trusted pointer arguments, passing 0 (NULL) to a kfunc that doesn't mark the argument as __nullable or __opt will be rejected with a failure message of: Possibly NULL pointer passed to trusted arg Pass a non-null value to the kfunc to test the expected failure mode. Acked-by: Eduard Zingerman Reviewed-by: Emil Tsalapatis Signed-off-by: Puranjay Mohan --- tools/testing/selftests/bpf/progs/test_kfunc_dynptr_param.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/test_kfunc_dynptr_param.c b/tools/testing/selftests/bpf/progs/test_kfunc_dynptr_param.c index 061befb004c2..d249113ed657 100644 --- a/tools/testing/selftests/bpf/progs/test_kfunc_dynptr_param.c +++ b/tools/testing/selftests/bpf/progs/test_kfunc_dynptr_param.c @@ -48,10 +48,9 @@ SEC("?lsm.s/bpf") __failure __msg("arg#0 expected pointer to stack or const struct bpf_dynptr") int BPF_PROG(not_ptr_to_stack, int cmd, union bpf_attr *attr, unsigned int size, bool kernel) { - unsigned long val = 0; + static struct bpf_dynptr val; - return bpf_verify_pkcs7_signature((struct bpf_dynptr *)val, - (struct bpf_dynptr *)val, NULL); + return bpf_verify_pkcs7_signature(&val, &val, NULL); } SEC("lsm.s/bpf") -- 2.47.3