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Mon, 29 Sep 2025 09:57:39 +0200 (CEST) X-Virus-Scanned: amavisd-new at boeck4.rrze.uni-erlangen.de (RRZE) X-RRZE-Flag: Not-Spam X-RRZE-Submit-IP: 10.188.34.184 Received: from localhost (i4laptop33.informatik.uni-erlangen.de [10.188.34.184]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: U2FsdGVkX1/qSYmlndMZ2soByeqa6AAIxSVy7E6kwls=) by smtp-auth.uni-erlangen.de (Postfix) with ESMTPSA id 4cZtp90K9cz8sjZ; Mon, 29 Sep 2025 09:57:37 +0200 (CEST) From: Luis Gerhorst To: bpf@vger.kernel.org Cc: andrii@kernel.org, ast@kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.com, henriette.herzog@rub.de, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, linux-kernel@vger.kernel.org, martin.lau@linux.dev, memxor@gmail.com, sdf@fomichev.me, song@kernel.org, syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev Subject: Re: [syzbot] [bpf?] WARNING in maybe_exit_scc In-Reply-To: <68c939d3.050a0220.2ff435.03c1.GAE@google.com> (syzbot's message of "Tue, 16 Sep 2025 03:20:03 -0700") References: <68c939d3.050a0220.2ff435.03c1.GAE@google.com> User-Agent: mu4e 1.12.12; emacs 30.2 Date: Mon, 29 Sep 2025 09:57:36 +0200 Message-ID: <878qhxadxr.fsf@fau.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain syzbot writes: > syzbot has bisected this issue to: > > commit d6f1c85f22534d2d9fea9b32645da19c91ebe7d2 > Author: Luis Gerhorst > Date: Tue Jun 3 21:24:28 2025 +0000 > > bpf: Fall back to nospec for Spectre v1 > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17753762580000 > start commit: f83ec76bf285 Linux 6.17-rc6 > git tree: upstream > final oops: https://syzkaller.appspot.com/x/report.txt?x=14f53762580000 > console output: https://syzkaller.appspot.com/x/log.txt?x=10f53762580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=8f01d8629880e620 > dashboard link: https://syzkaller.appspot.com/bug?extid=3afc814e8df1af64b653 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=104a947c580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14467b62580000 > > Reported-by: syzbot+3afc814e8df1af64b653@syzkaller.appspotmail.com > Fixes: d6f1c85f2253 ("bpf: Fall back to nospec for Spectre v1") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection Sorry for the delay as I was out of office. I will be looking into this and also [1] shortly. [1] https://lore.kernel.org/bpf/68c8de6b.050a0220.3c6139.0d26.GAE@google.com/ ("Re: [syzbot] [bpf?] WARNING in do_check (2)")