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[2600:3c01:e000:3d8::1]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3339a534d25sm14339020eec.5.2026.09.05.06.11.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 05 Sep 2026 06:11:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=dancol.org; s=x; h=Content-Type:MIME-Version:Message-ID:Date:Subject:To:From; bh=vLMEvFXATtb+qL7qAJFQ7jf+Bqc2hC7mwyFeDTc3h3g=; b=iy+7qsu0qjxq6SCPeFcJJEO2MG qo4kABksfNV4jLUmfPfT27iGZHz/KqWNInqSd6TUfBctQyXbF+vKJ1gxP0/D2WJWpMFUH7qDTKI40 bmlOI64c3agHpMHuecbw98BAJaMPBbnQMU/Wml0r4Kw0skbY9Dq1LNqBlOsvrJVUPFCA+9P7LLCKW zmYoi4Ymj8RJ5l2HNn97eoFkpY/lSuM1TQkigvRkbgqVRgmADeDZ9Hnq0xzom1/UavJBECPBl9qFu oxZ98FtifArtR4V0iNjrGBfSjlBjdWgstpSc3AmGfDwyTRs9zHHzCVqwCV3nMVty0h4PC26+0Bv0/ 3/oDjfwQ==; Received: from [188.54.63.22] (port=43451 helo=localhost) by dancol.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1x2qAn-00000000XxG-3tgb; Sat, 05 Sep 2026 09:11:11 -0400 From: Daniel Colascione To: adrii@kernel.org, bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, mhiramt@kernel.org, akinobu.mita@gmail.com Subject: Fault injection for bpf_ringbuf_reserve? User-Agent: mu4e 1.14.1; emacs 31.0.50 Date: Sat, 05 Sep 2026 16:11:07 +0300 Message-ID: <87ik4jj11w.fsf@dancol.org> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Might it be possible to bless bpf_ringbuf_reserve with ALLOW_ERROR_INJECTION so it's easier to test eBPF code that reacts to ring buffer entry reservation failure? Am I missing some other way to do this other than janky artificial ring-buffer filling?