From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f77.google.com (mail-io1-f77.google.com [209.85.166.77]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 143872D2488 for ; Tue, 4 Nov 2025 11:29:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762255777; cv=none; b=ukCzwWo0gNZDyFYJrhtg5qkUNZlvmuQc7LXH1y7RxVMkGveUnFzWSPCO9a/RgOFq3KhGGqVKc8+rpuYDn25Xckr9poLbWayqmJJXZ++fT9SxqFj5jj8OFQvRTpVzGZqn55cvWoCY3o0m88IgoFZOEIguYDLsaG6Aon9Pzg6PIFg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762255777; c=relaxed/simple; bh=kVZS8cbDE+c0gpGCPYs/RrNkIXHAqMRQVmxZev4xBUE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=VunGpq1GPWJ9EhmxgTOJ6yYtPlVQpCCG4+C8jyoVH62P+50ue+S1kQjIvUZGkvpgu7WPSPXoWtywpkDgOPlDQ0YVRXEwLP8WqRVIc67lobvl/bhd0Y07ghviDb0YH8jBIr8rX2P4najTr+axlU92r5jr/nAtWonVf0DFqnvi+yA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.77 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f77.google.com with SMTP id ca18e2360f4ac-945a94ceab8so528775339f.0 for ; Tue, 04 Nov 2025 03:29:35 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762255775; x=1762860575; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=wfdSiD6H6dgNLjSNWHtvaDbepxoyRDcG7l0NgNAm8pY=; b=IdYyiwEKO6wsqtJLMDbeGj9brxJkAiC7cl89+QSIQb+0WZrxmJ1sKMpLOYETzMIXAU 7sHpyOlpvRxufn1OE9zXe7Orb+U77cyyE0MwZL4CAh8Djr+XhdAys1d/JanRbMg2fs2L tCC8rRGYl4R69unM5xac/XrZtce+zSAMXsZ9H05MTu5EP6qHZZKuJkbwq0fHhVsCgH/u qLGjG/eSIq0wwyZzUHF0PJtANRH8z3RfYSHQ1Ywm2B+jxddFhksQ4q+g8U6S8Kuiyl4t g7vKBhf2HtEZjOxBCRS+uUwu7Q6sO+LIKLDZKogIU6HgJEMoASQLWvKnlVNJsCtoJruL 7acA== X-Forwarded-Encrypted: i=1; AJvYcCU5sWoIFLpx/lJbrudV6gJQQccb7WqG6CTYrBCnCVU3SUyH4VFP16eK76bGnqDRGdy+E4P8TlIYMULQlWI=@vger.kernel.org X-Gm-Message-State: AOJu0YwLQeCC4Z5R0N5YzORni6raflH+oMd27jO9vvmKA2+BfDwGtPMF gLoEjk8TMkNLKhfF1J7OkGr1hEjM9n7SoXlcmb2H2fa7MM9pvRokYI+YKsj+/x/W2lnHbYQgxW7 RVeoQTWEohXlUqs7Km/GnEfhLxw8q4B/cFlSh6x5dcgpptuvBqGV0/gtOCAg= X-Google-Smtp-Source: AGHT+IG7UblVhGBxAqv2BjydP9+MTF2Kw0Nmte9yhn0DET0eBHB1INzVsl4SOmkKE3RI9SWoL8bmvVFvppMSWd4cTGoUQyisFDut Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2604:b0:426:c373:25f5 with SMTP id e9e14a558f8ab-4330d1c9d9cmr239510745ab.17.1762255775237; Tue, 04 Nov 2025 03:29:35 -0800 (PST) Date: Tue, 04 Nov 2025 03:29:35 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6909e39f.050a0220.98a6.00ac.GAE@google.com> Subject: [syzbot] [net?] KMSAN: uninit-value in macsec_handle_frame (2) From: syzbot To: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, sd@queasysnail.net, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 6fab32bb6508 MAINTAINERS: add Mark Brown as a linux-next m.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=100c2614580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8e9863e17aadf7a1 dashboard link: https://syzkaller.appspot.com/bug?extid=0e665e4b99cb925286a0 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/df4a4033fe11/disk-6fab32bb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cc3ed0072d4f/vmlinux-6fab32bb.xz kernel image: https://storage.googleapis.com/syzbot-assets/58cfbb151380/bzImage-6fab32bb.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0e665e4b99cb925286a0@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in macsec_handle_frame+0x2f6/0x5410 drivers/net/macsec.c:1148 macsec_handle_frame+0x2f6/0x5410 drivers/net/macsec.c:1148 __netif_receive_skb_core+0x2043/0x7150 net/core/dev.c:5966 __netif_receive_skb_one_core net/core/dev.c:6077 [inline] __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6192 process_backlog+0x485/0xa00 net/core/dev.c:6544 __napi_poll+0xdd/0x8a0 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0xbc8/0x1c30 net/core/dev.c:7784 handle_softirqs+0x169/0x6e0 kernel/softirq.c:622 __do_softirq+0x14/0x1b kernel/softirq.c:656 do_softirq+0x99/0x100 kernel/softirq.c:523 __local_bh_enable_ip+0xa1/0xb0 kernel/softirq.c:450 local_bh_enable include/linux/bottom_half.h:33 [inline] netif_rx+0xdb/0x3f0 net/core/dev.c:5647 pn_send+0x95b/0xb80 net/phonet/af_phonet.c:185 pn_skb_send+0x462/0xa70 net/phonet/af_phonet.c:272 pipe_handler_request net/phonet/pep.c:144 [inline] pep_sock_connect+0x2af/0x490 net/phonet/pep.c:894 pn_socket_connect+0x576/0xd10 net/phonet/socket.c:255 __sys_connect_file net/socket.c:2102 [inline] __sys_connect+0x51a/0x680 net/socket.c:2121 __do_sys_connect net/socket.c:2127 [inline] __se_sys_connect net/socket.c:2124 [inline] __x64_sys_connect+0x95/0x100 net/socket.c:2124 x64_sys_call+0x3744/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:43 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4969 [inline] slab_alloc_node mm/slub.c:5272 [inline] kmem_cache_alloc_node_noprof+0x989/0x16b0 mm/slub.c:5324 kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:579 __alloc_skb+0x347/0x7d0 net/core/skbuff.c:670 alloc_skb include/linux/skbuff.h:1383 [inline] pn_raw_send+0x59/0x510 net/phonet/af_phonet.c:207 send_reset_indications+0x139/0x1c0 net/phonet/af_phonet.c:344 phonet_rcv+0x1478/0x1830 net/phonet/af_phonet.c:409 __netif_receive_skb_one_core net/core/dev.c:6079 [inline] __netif_receive_skb+0x477/0xac0 net/core/dev.c:6192 process_backlog+0x485/0xa00 net/core/dev.c:6544 __napi_poll+0xdd/0x8a0 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0xbc8/0x1c30 net/core/dev.c:7784 handle_softirqs+0x169/0x6e0 kernel/softirq.c:622 __do_softirq+0x14/0x1b kernel/softirq.c:656 CPU: 0 UID: 0 PID: 6693 Comm: syz.0.173 Tainted: G W syzkaller #0 PREEMPT(none) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 ===================================================== --- 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 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