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AJvYcCUpMpsTnsibbkgXqncO1WIP5zPSvhnD6adktwUsD6zXj+bp5RE83VaqL02ji9fseU1Zu9j1Fgczgq4HCOCDltBhvhjFRxrnfERivB2+ X-Gm-Message-State: AOJu0Ywks1dJ6lO8DGnwvHshvJm79GHda3X3WaEFm1/dm0t6B4l2pm4z /qUs1MYkzgBv3ZMigfVEW4aaOZ7Kg2UjPSCHCxUixkICY12Pzgg/JTfHPO9BDsH4FMD6kF5B0mD ZiYvLdZbCQmisiyEkh7x6uOGEuiGue24QOmlo X-Received: by 2002:a17:903:11c4:b0:1e0:94bb:c4aa with SMTP id q4-20020a17090311c400b001e094bbc4aamr728537plh.11.1712039818767; Mon, 01 Apr 2024 23:36:58 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <000000000000f9ce6d061494e694@google.com> <2ee098ec-a46f-44fa-8719-049331c4c206@linux.dev> In-Reply-To: <2ee098ec-a46f-44fa-8719-049331c4c206@linux.dev> From: Aleksandr Nogikh Date: Tue, 2 Apr 2024 08:36:44 +0200 Message-ID: Subject: Re: [syzbot] [bpf?] KMSAN: uninit-value in trie_delete_elem To: Yonghong Song , Alexander Potapenko Cc: syzbot , andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, linux-kernel@vger.kernel.org, martin.lau@linux.dev, sdf@google.com, song@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi, On Mon, Apr 1, 2024 at 8:55=E2=80=AFPM Yonghong Song wrote: > > > On 3/26/24 12:00 PM, syzbot wrote: > > Hello, > > > > syzbot found the following issue on: > > > > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D > > BUG: KMSAN: uninit-value in trie_delete_elem+0xc0/0xbe0 kernel/bpf/lpm_= trie.c:448 > > Unrelated to the bug itself, with KMSAN is enabled, qemu cannot boot my v= m > any more. Anything special I need to do in order to boot a KMSAN kernel? > Does the kernel print any specific errors to the serial console while booting? Or nothing at all? --=20 Aleksandr