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([2620:10d:c092:500::7:916f]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48a7c5c740fsm46504345e9.12.2026.04.29.05.27.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Apr 2026 05:27:35 -0700 (PDT) Message-ID: <507085b1b3d66874bfbfca531852233bea15123c.camel@gmail.com> Subject: Re: [PATCH bpf-next 05/18] bpf: Reject stack arguments in non-JITed programs From: Eduard Zingerman To: Yonghong Song , bpf@vger.kernel.org Cc: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , "Jose E . Marchesi" , kernel-team@fb.com, Martin KaFai Lau , Puranjay Mohan Date: Wed, 29 Apr 2026 05:27:34 -0700 In-Reply-To: <20260424171459.2036024-1-yonghong.song@linux.dev> References: <20260424171433.2034470-1-yonghong.song@linux.dev> <20260424171459.2036024-1-yonghong.song@linux.dev> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.3 (3.58.3-1.fc43) Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, 2026-04-24 at 10:14 -0700, Yonghong Song wrote: > The interpreter does not understand the bpf register r11 > (BPF_REG_PARAMS) used for stack arguments. So reject interpreter > usage if stack arguments are used either in the main program or > any subprogram. >=20 > Acked-by: Puranjay Mohan > Signed-off-by: Yonghong Song > --- Acked-by: Eduard Zingerman [...]