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Tue, 29 Oct 2024 14:01:12 -0700 (PDT) X-Google-Smtp-Source: AGHT+IF1qigmT2ZHXS67eFLNcxyTAr/uVtukSkT86//Ve1k4KoNyQor1IgHemQv7UZizKSFDozLXDg== X-Received: by 2002:a17:907:1c29:b0:a99:e67a:d12d with SMTP id a640c23a62f3a-a9de61ce61bmr1233008866b.48.1730235672019; Tue, 29 Oct 2024 14:01:12 -0700 (PDT) Received: from alrua-x1.borgediget.toke.dk ([45.145.92.2]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9b1f297b04sm507491966b.134.2024.10.29.14.01.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Oct 2024 14:01:11 -0700 (PDT) Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id 1822C164B269; Tue, 29 Oct 2024 22:01:10 +0100 (CET) From: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= To: syzbot , akpm@linux-foundation.org, davem@davemloft.net, edumazet@google.com, hawk@kernel.org, ilias.apalodimas@linaro.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [net?] BUG: Bad page state in bpf_test_run_xdp_live In-Reply-To: <671ecfe4.050a0220.2b8c0f.01ed.GAE@google.com> References: <671ecfe4.050a0220.2b8c0f.01ed.GAE@google.com> X-Clacks-Overhead: GNU Terry Pratchett Date: Tue, 29 Oct 2024 22:01:10 +0100 Message-ID: <8734ked3op.fsf@toke.dk> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain #syz test --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -246,6 +246,7 @@ static void reset_ctx(struct xdp_page_head *head) head->ctx.data_meta = head->orig_ctx.data_meta; head->ctx.data_end = head->orig_ctx.data_end; xdp_update_frame_from_buff(&head->ctx, head->frame); + head->frame->mem = head->orig_ctx.rxq->mem; } static int xdp_recv_frames(struct xdp_frame **frames, int nframes,