From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f71.google.com (mail-oa1-f71.google.com [209.85.160.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 55D4AAC for ; Tue, 5 Dec 2023 10:25:33 -0800 (PST) Received: by mail-oa1-f71.google.com with SMTP id 586e51a60fabf-1fae4875e0eso5701637fac.3 for ; Tue, 05 Dec 2023 10:25:33 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701800732; x=1702405532; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Qt2IPYpVqJcBLk2RvD4/pXQbbdMV2lIC4jrljwh1tcQ=; b=icXW00+SiTkzbGYY7+gdltMUEIFpErB8KJGFONYMRm+ra5BC9gPuvtU199/f2sq+Sj OZh2dND/mFv7XYe4m9st7aVtA2uw+esem5BpUCJAX+GCclN5fJGSMZGo9cjtUO7MorQY uQNCW4Z8fbuVfcuu2Yg/vTauSiY1DtnTVJGHkLPnPy+KU9pfKJEhp/hSU/sak2F1Zk9R HV+Jqwl1pJqzOhzDZuAWJeyIpyIPVO1ROmz7YfhI0Tz7j6qgLaOFVEfHL4Ne1vU3Bwpn ZeWIXfGPqzDWgmrrvyUiLkxeUo4Y1vzhGt7wbmWfueDZDnti+oaXWfNaKeaFNj8qNg0p XFOQ== X-Gm-Message-State: AOJu0YzDxH1ypw/cFDoTXjre31G0ZL6l85RowETC4D5VHMG8/UWK7/i3 2bFOHROuporKQ6nfEO3cQZ77yVY1Hk6CpYkqSSRsI/0kpKys X-Google-Smtp-Source: AGHT+IFZHDzqNlD/0jbez0iFB7jDTZLKQWBYaRkHCavKQDFJMy29oEdnZomvbogAb4l3Gwi/W180SmdAfMKy1SJ39SDJXY+G2tS8 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6870:160a:b0:1fa:4e4:c49 with SMTP id b10-20020a056870160a00b001fa04e40c49mr5853088oae.0.1701800731972; Tue, 05 Dec 2023 10:25:31 -0800 (PST) Date: Tue, 05 Dec 2023 10:25:31 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001b9bed060bc75cbc@google.com> Subject: [syzbot] [net?] KMSAN: uninit-value in __llc_lookup_established From: syzbot To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Spam-Level: ** Hello, syzbot found the following issue on: HEAD commit: 1c41041124bd Merge tag 'i3c/for-6.7' of git://git.kernel.o.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=10429eeb680000 kernel config: https://syzkaller.appspot.com/x/.config?x=956549bd1d1e9efd dashboard link: https://syzkaller.appspot.com/bug?extid=b5ad66046b913bc04c6f compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12b6a00f680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=121471ef680000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/20fd86e677f1/disk-1c410411.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ccd39cb0b7b6/vmlinux-1c410411.xz kernel image: https://storage.googleapis.com/syzbot-assets/156fc60f97bc/bzImage-1c410411.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b5ad66046b913bc04c6f@syzkaller.appspotmail.com syz-executor994 uses obsolete (PF_INET,SOCK_PACKET) ===================================================== BUG: KMSAN: uninit-value in __llc_lookup_established+0xe9d/0xf90 __llc_lookup_established+0xe9d/0xf90 __llc_lookup net/llc/llc_conn.c:611 [inline] llc_conn_handler+0x4bd/0x1360 net/llc/llc_conn.c:791 llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206 __netif_receive_skb_one_core net/core/dev.c:5527 [inline] __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5641 netif_receive_skb_internal net/core/dev.c:5727 [inline] netif_receive_skb+0x58/0x660 net/core/dev.c:5786 tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1555 tun_get_user+0x53af/0x66d0 drivers/net/tun.c:2002 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:2020 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x8ef/0x1490 fs/read_write.c:584 ksys_write+0x20f/0x4c0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b Local variable daddr created at: llc_conn_handler+0x53/0x1360 net/llc/llc_conn.c:783 llc_rcv+0xfbb/0x14a0 net/llc/llc_input.c:206 CPU: 1 PID: 5004 Comm: syz-executor994 Not tainted 6.6.0-syzkaller-14500-g1c41041124bd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup