From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi2-f2.google.com (mail-oi2-f2.google.com [74.125.231.194]) (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 A6B813A5456 for ; Tue, 25 Aug 2026 08:41:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.194 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787647291; cv=none; b=CNPQUxr1zuaduUxX61t1KdmwtGbylVN8OSyAyYauAZyhxQTPw4chlmm8RprSedwb3njpY9yI83i5K1kkBkoRlhqBIW25/vbg/sw8lZAiEfiv/Ui5pxR9D1vpa8W5EEDRHIDj114F0tK3r8aUSHLhereVxQRWZKyCOAJkjPKuOXI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787647291; c=relaxed/simple; bh=JjDmOj1GqFNPXlCmwyCFyqPpBM4BQfOkb/aT67Mi1vQ=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=MVYaLABOrSP58Rrb1jtnqBwWnTvzH7zYoXRhnN11lRE0bTb5DrJfroNaOkfF7/OgAqDE1Ds8ECzARwnHgjk0NT73XKNdKrB/k1W3lBw1HQOv6HnWdqFDHZ+Rn1EOIBS/V4kH/dOlYv+RkxCOHSqH4NA9p7k1l4TVXUfenI3Aaj4= 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=74.125.231.194 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-oi2-f2.google.com with SMTP id 5614622812f47-495d5d27acfso2078041b6e.1 for ; Tue, 25 Aug 2026 01:41:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787647288; x=1788252088; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=LRK/PKPVvSzj2nn7/8M9Fn4v9/q4xHzhBBlzpDw/nIk=; b=aKn643+cPl0AyL4TyHf3EF1cKJno5VhCbqHDv2UdjTbCKPHOCKsx81DfINuiHnEgUJ +O/2t8WTb9vCxnSYAJiCiL1cJLAf+LlPN9b3jnhtcve8abdPTpMhpkrQrSUFdev/mdEe vk1xFs+JiPJsiDlxsJvABymQjh9S/Bnvf4kNuFnqQM9JGKqQ3bRJPAJouMGRwhZSht2w R5u7TZjLAJrFZ6N0xthOTFKzPRoWHSuaznAY/aF4BhkW1cmCQVocEbeF8rjjJ7tUnTjh oVGUiqh/v0IbAO3MXK8/wvttSHz4YifrAOVnicwX3CT2UwVxsHLmJxDLbdJX4+Z/zdoo HxwA== X-Forwarded-Encrypted: i=1; AHgh+RooT8SrYVqFg1d9h6gCfW6Zxx9kYbAigTztF64F5DhZMs/rSBdJdV7LeBi0OSHd/4/qHoy8KkU=@vger.kernel.org X-Gm-Message-State: AFuF++kj+Y74UqjOG+eGvY73R0qp9mtE6EPEYEPnDobo09JWGj0Uqp5V b42K2kwSk6dZkDAmlsOTBDF5Lqaow/MgjvNTnpCwtifDgwK3fthhgESu8aeh88iKCHWvbGmpPYq QiR/MHs3Ms4rTKqruTi2i0ltLJIS4h1RAeKJ6s+ShaBJY9FYOfsTXvIWcOdE= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:22ab:b0:4a3:f4b7:cbdf with SMTP id 5614622812f47-4b2ef3b0cb6mr31741226b6e.15.1787647288622; Tue, 25 Aug 2026 01:41:28 -0700 (PDT) Date: Tue, 25 Aug 2026 01:41:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a8d5538.91706f20.ef82.0009.GAE@google.com> Subject: [syzbot] [net?] WARNING in trace_event_raw_event_icmp_send From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, horms@kernel.org, idosch@nvidia.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" Hello, syzbot found the following issue on: HEAD commit: 68f892e99df9 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=1570b979580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d1128bc53f2ef7f3 dashboard link: https://syzkaller.appspot.com/bug?extid=6d2762674103618994b0 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f98dd20a7b98/disk-68f892e9.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/441f1ad32549/vmlinux-68f892e9.xz kernel image: https://storage.googleapis.com/syzbot-assets/8da5227b7dc8/Image-68f892e9.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6d2762674103618994b0@syzkaller.appspotmail.com binder: 11339:11341 DecRefs 0 refcount change on invalid ref 3 ret -22 ------------[ cut here ]------------ WARNING: ./include/linux/skbuff.h:3087 at skb_transport_header include/linux/skbuff.h:3087 [inline], CPU#1: syz.7.1884/11341 WARNING: ./include/linux/skbuff.h:3087 at udp_hdr include/linux/udp.h:23 [inline], CPU#1: syz.7.1884/11341 WARNING: ./include/linux/skbuff.h:3087 at do_trace_event_raw_event_icmp_send include/trace/events/icmp.h:30 [inline], CPU#1: syz.7.1884/11341 WARNING: ./include/linux/skbuff.h:3087 at trace_event_raw_event_icmp_send+0x48c/0x6ec include/trace/events/icmp.h:11, CPU#1: syz.7.1884/11341 Modules linked in: CPU: 1 UID: 0 PID: 11341 Comm: syz.7.1884 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : skb_transport_header include/linux/skbuff.h:3087 [inline] pc : udp_hdr include/linux/udp.h:23 [inline] pc : do_trace_event_raw_event_icmp_send include/trace/events/icmp.h:30 [inline] pc : trace_event_raw_event_icmp_send+0x48c/0x6ec include/trace/events/icmp.h:11 lr : skb_transport_header include/linux/skbuff.h:3087 [inline] lr : udp_hdr include/linux/udp.h:23 [inline] lr : do_trace_event_raw_event_icmp_send include/trace/events/icmp.h:30 [inline] lr : trace_event_raw_event_icmp_send+0x48c/0x6ec include/trace/events/icmp.h:11 sp : ffff800094826d60 x29: ffff800094826e40 x28: ffff0000d2770000 x27: ffff0000f3109e76 x26: 000000000000ffff x25: ffff700012904db4 x24: 000000000000ffff x23: 00000000000000a0 x22: 1fffe0001e6213ce x21: ffff0000f3109dc0 x20: ffff0000fbb766f0 x19: ffff0000d3be1d48 x18: 00000000ffffffff x17: ffff80008a7d6000 x16: 0000000000000004 x15: ffff80008a35fda0 x14: ffff80008a5d5e28 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000080000 x9 : 00000000000033d0 x8 : ffff8000a22ec000 x7 : 0000000000000000 x6 : 646165725f756372 x5 : ffff0000fbb766e9 x4 : 0000000000000008 x3 : ffff800085503d58 x2 : 000000000000ffff x1 : ffff0000d3be1d40 x0 : 0000000000000001 Call trace: skb_transport_header include/linux/skbuff.h:3087 [inline] (P) udp_hdr include/linux/udp.h:23 [inline] (P) do_trace_event_raw_event_icmp_send include/trace/events/icmp.h:30 [inline] (P) trace_event_raw_event_icmp_send+0x48c/0x6ec include/trace/events/icmp.h:11 (P) __traceiter_icmp_send include/trace/events/icmp.h:11 [inline] __do_trace_icmp_send include/trace/events/icmp.h:11 [inline] trace_icmp_send+0x320/0x49c include/trace/events/icmp.h:11 __icmp_send+0xcfc/0x11d8 net/ipv4/icmp.c:1013 ipv4_send_dest_unreach net/ipv4/route.c:1280 [inline] ipv4_link_failure+0x57c/0x8dc net/ipv4/route.c:1287 dst_link_failure include/net/dst.h:438 [inline] vti_xmit net/ipv4/ip_vti.c:271 [inline] vti_tunnel_xmit+0xe40/0x17a4 net/ipv4/ip_vti.c:307 __netdev_start_xmit include/linux/netdevice.h:5397 [inline] netdev_start_xmit include/linux/netdevice.h:5406 [inline] xmit_one net/core/dev.c:3889 [inline] dev_hard_start_xmit+0x1dc/0x9d4 net/core/dev.c:3905 __dev_queue_xmit+0xed4/0x2bc0 net/core/dev.c:4878 dev_queue_xmit include/linux/netdevice.h:3448 [inline] packet_xmit+0x6c/0x314 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3107 [inline] packet_sendmsg+0x2f40/0x3e78 net/packet/af_packet.c:3139 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg+0xc8/0x17c net/socket.c:790 __sys_sendto+0x250/0x328 net/socket.c:2252 __do_sys_sendto net/socket.c:2259 [inline] __se_sys_sendto net/socket.c:2255 [inline] __arm64_sys_sendto+0xec/0x10c net/socket.c:2255 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x19c/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 irq event stamp: 3053 hardirqs last enabled at (3052): [] get_random_u8+0x3d8/0x7dc drivers/char/random.c:539 hardirqs last disabled at (3053): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (3024): [] __alloc_skb+0x1c0/0x610 net/core/skbuff.c:698 softirqs last disabled at (3028): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (3028): [] rcu_read_lock_bh include/linux/rcupdate.h:893 [inline] softirqs last disabled at (3028): [] __dev_queue_xmit+0x1fc/0x2bc0 net/core/dev.c:4796 ---[ end trace 0000000000000000 ]--- --- 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