From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f78.google.com (mail-io1-f78.google.com [209.85.166.78]) (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 69E951C27 for ; Sun, 25 May 2025 00:35:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748133334; cv=none; b=BfuoUIprTvk3udV+xv2hyF09Q7VSWI0r4GhEfTarEu5r6z5f3fr00v6QX4OczM1OjTsXRsex/6HCoUXJjhoAioN6Fg1RZpITZy/UoE3bZoig3YXsLxFH02eowyq9MWb9LzFsGyYIam77haf+JDEWXRbirLHrbCHCsQFJEXflsOg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748133334; c=relaxed/simple; bh=L4zgyOYQkXe1TwEHTKOkIWG3mjooGvJuPtmysqGRdy4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=T186oCz/L/QiBDVNUOE7v1dLsvPEGk0JyXF45qTjGz8Lp1Y1KyXyVjNcxORDElJG3NR+Y1M4mEub8ofOUYK/icWr4GNT+VSVvibm6i87RGS7/f5mldtTV56k7/647/rigaxXPIgRT67xmmbVzEHQdLLePLPooZzwdQpdtLjrVKw= 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=209.85.166.78 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-f78.google.com with SMTP id ca18e2360f4ac-85b4ee2e69bso122035939f.2 for ; Sat, 24 May 2025 17:35:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748133331; x=1748738131; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=xWWK+qMVgJ3rdWvJXq9kGidb+mXQt3BP1CZfBdNoa60=; b=b1lNIr7rAcMbnaCQ1NkGt3vjnunsdtEqzpVuEsImLQ9ty9Ja808hNTFeWJXv99W86A KSEXLGfKuIs+RD4ifvff2vMIvBwB5I6Cewpd38KA/WWYktawsZ3jDOspJnTgvhGQLCg4 JBt40Hl+LdR/dBOD00hTNOLhwXpV/Sf/98a89RSHlu+RcOHbixgNWNEjyCMGyPsu4JBY 4vxUXWcXqqhc8OoFK7BSU8VEKpctCZ+rPdA0d17y6syMe6fun24VxW05QS03WfUFpRiY WRS6UhwF1nscrPBDaIkX9FuzwC8GWTdzHyLkkAsQpOC5cmp9NBWf05vgIYmx5vLtctxj uzpw== X-Forwarded-Encrypted: i=1; AJvYcCUbmS3A+YCZcqITIk/G4IJQgdJC1BSDzYGJOGPBnnEVS0d5CesigIbBQDz9sGjbiuMiqd3taYQ=@vger.kernel.org X-Gm-Message-State: AOJu0YyFPkE25UTAxTkKjE/PIUf28uiqaMDwzaemPq9VuPb/K/2snc5K ZMF4nbKQcza/tIBKwbPRyaToQ9BKjXayyM7gAwyA/lSdMgpNDphIVpWMZTK7GkMc8n83IeSv/e5 xt2gY+GJRXcBD1SCQy+1o7LttU+lYUNNOwRhXD+4BoiOm2SlJ47aKl2GdZ8Y= X-Google-Smtp-Source: AGHT+IEaW4BZX9jfmWZDDHdbtKveQDFudESHkmgH2lViz2Kq21ChgvLrxpEMkR2FQ5oY55Ya7BzNDa1fdPTwNPxlxc7tXLrvrWFd Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:3790:b0:86a:1fce:f1a6 with SMTP id ca18e2360f4ac-86cbb7ece8dmr402586239f.5.1748133331449; Sat, 24 May 2025 17:35:31 -0700 (PDT) Date: Sat, 24 May 2025 17:35:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <683265d3.a70a0220.253bc2.0079.GAE@google.com> Subject: [syzbot] [net?] WARNING in ah6_output From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, herbert@gondor.apana.org.au, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, steffen.klassert@secunet.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 9e89db3d847f Merge tag 'linux-can-fixes-for-6.15-20250520'.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=1476d1f4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c3f0e807ec5d1268 dashboard link: https://syzkaller.appspot.com/bug?extid=01b0667934cdceb4451c compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8b09322b598e/disk-9e89db3d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/23ed08e707b5/vmlinux-9e89db3d.xz kernel image: https://storage.googleapis.com/syzbot-assets/be78b62450e7/bzImage-9e89db3d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+01b0667934cdceb4451c@syzkaller.appspotmail.com ------------[ cut here ]------------ memcpy: detected field-spanning write (size 40) of single field "&top_iph->saddr" at net/ipv6/ah6.c:439 (size 16) WARNING: CPU: 0 PID: 8838 at net/ipv6/ah6.c:439 ah6_output+0xe7e/0x14e0 net/ipv6/ah6.c:439 Modules linked in: CPU: 0 UID: 0 PID: 8838 Comm: syz.1.814 Not tainted 6.15.0-rc6-syzkaller-00173-g9e89db3d847f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:ah6_output+0xe7e/0x14e0 net/ipv6/ah6.c:439 Code: ff e8 36 80 9f f7 c6 05 bb 97 48 05 01 90 b9 10 00 00 00 48 c7 c7 a0 56 7e 8c 4c 89 fe 48 c7 c2 00 59 7e 8c e8 a3 dc 63 f7 90 <0f> 0b 90 90 e9 b5 fe ff ff e8 74 e4 35 01 48 8b 4c 24 10 80 e1 07 RSP: 0018:ffffc900049f70e0 EFLAGS: 00010246 RAX: 3fffcb5d3bcc7c00 RBX: 0000000000000028 RCX: 0000000000080000 RDX: ffffc9000ece1000 RSI: 00000000000052e8 RDI: 00000000000052e9 RBP: ffffc900049f7250 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bba944 R12: dffffc0000000000 R13: 1ffff9200093ee38 R14: ffff8881452e8800 R15: 0000000000000028 FS: 00007fc3a1d2c6c0(0000) GS:ffff8881260c7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555569628808 CR3: 000000005cf4e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xfrm_output_one net/xfrm/xfrm_output.c:555 [inline] xfrm_output_resume+0x2c55/0x6170 net/xfrm/xfrm_output.c:590 __xfrm6_output+0x2eb/0x1070 net/ipv6/xfrm6_output.c:103 NF_HOOK_COND include/linux/netfilter.h:303 [inline] xfrm6_output+0x1c6/0x4f0 net/ipv6/xfrm6_output.c:108 ip6_send_skb+0x1d5/0x390 net/ipv6/ip6_output.c:1981 l2tp_ip6_sendmsg+0x1378/0x1870 net/l2tp/l2tp_ip6.c:661 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x19c/0x270 net/socket.c:727 ____sys_sendmsg+0x505/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc3a0f8e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc3a1d2c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc3a11b6080 RCX: 00007fc3a0f8e969 RDX: 0000000000000800 RSI: 0000200000000540 RDI: 0000000000000004 RBP: 00007fc3a1010ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc3a11b6080 R15: 00007ffc18a80a58 --- 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