From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f79.google.com (mail-oo1-f79.google.com [209.85.161.79]) (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 00DFC29BD91 for ; Thu, 8 Jan 2026 18:13:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767896011; cv=none; b=ctvy9I3ZerNyh5L4ZtekEUsJQlBgnijZ8jedv++tNF7SpFeOwDlR8PKFxI0KbeeathGiVl2a99Ci7swkdjnO+TBEOi/EiguxGNDFL+yw/bFDx8OB4fCb6ja2iMFt/D36x0DPc8SqSVBxJmUVjyXDCl4FnqVqdAnm1kqnZMYtl5o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767896011; c=relaxed/simple; bh=epmOCCX7/U6vLLSYgTMlUHh6lRFCoDxZ2dRmeYo7O6s=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=oWLrDudFbSeJbzUaOCfzM5+1U4+WamtpUhYAs1VqV+7rKwmcoMBL2Dhog5tHKNc9fo1Kkq5/pHItVe6W//Pa0H1eHOvWS/QFyCcog5akwjLLWkpCvqE1Z72mwCk79PNJf2VuPqyCv2chrT0fhQS5wH6vIOOpYKcwPohR44ay/yQ= 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=209.85.161.79 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-oo1-f79.google.com with SMTP id 006d021491bc7-65b73eb22d2so2247489eaf.2 for ; Thu, 08 Jan 2026 10:13:29 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767896009; x=1768500809; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=57vNfdcarOhFQCSjwkwna7TZn6CWb2tR8uFuTst1UFA=; b=CpBV8T+aWC+XC7VpyTNeCZuapeG+KFRCWHsCG52OvY+l/OIQCjr8GDC5KJgDy+uDxv iaxHfbhvUbeuaLFoyvBdqZaZy94WhqKG/kSqdh2zSNOJR7CWtAjfB7+m+crFsJVZiUGR kyUb/SuIwateflwNNWGefzT2iYvYr68XyC8w8+JodfmTaaP8jPWwU5EOCQtVztsDfoxZ jSm87S3xfJsDkvzlxKesgZ1HUr7amvAomuLp/owCD0nDWfeUbHaNg9NgMiKZuK5Y8Abl S1PpM2NrItcPq6eWd/ZbiApJyTPfh0kZJ/FblZkfeYmHG6RH5pzpIqRUNJO3/ipvZvg/ Ti9g== X-Forwarded-Encrypted: i=1; AJvYcCW6Y3r+8/2ngMyv1Is1BQwOP82MEMrzyM4Uy7mxyEGHRQclXOCcAvmBsL6TJupWS/VP//zZ4F8=@vger.kernel.org X-Gm-Message-State: AOJu0YzehLFxgBVK03jIns+TBcTj4bwdnhcc4yBhKvC1jWbgJNSFlHQr +/UYyKSVelyQM8y3a1sZj7bSY9/zclQrewR7AY2g0gJfCukKw57xWv5nbCJUOEgqNHJyrpAVD1k XcKEp+vUv8KHW2olxlTKZ2G+K8vGISHkQLa4PjdfFWQwrF/bAuzojLPr6G/I= X-Google-Smtp-Source: AGHT+IFeBTu3K7Jrr1eTNPZgVt1dcgA/SKrPU/btJrnhrzMO7d/ERMzuJV1XcYYtg8dMRTEZWkk44MsUeCeMPLDPfKJGAva46n29 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:8317:b0:65c:fe5e:b96d with SMTP id 006d021491bc7-65f54f7b4c7mr2006590eaf.66.1767896008859; Thu, 08 Jan 2026 10:13:28 -0800 (PST) Date: Thu, 08 Jan 2026 10:13:28 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <695ff3c8.050a0220.1c677c.03a6.GAE@google.com> Subject: [syzbot] [net?] kernel BUG in ipgre_header (4) From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, horms@kernel.org, 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: 6abcf751bc08 net: airoha: Fix schedule while atomic in air.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=11cd819a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a94030c847137a18 dashboard link: https://syzkaller.appspot.com/bug?extid=7c134e1c3aa3283790b9 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/34ff92f72e89/disk-6abcf751.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d04633dc422e/vmlinux-6abcf751.xz kernel image: https://storage.googleapis.com/syzbot-assets/e0b0478317bd/bzImage-6abcf751.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7c134e1c3aa3283790b9@syzkaller.appspotmail.com skbuff: skb_under_panic: text:ffffffff89ea3cb7 len:2030915468 put:2030915372 head:ffff888058b43000 data:ffff887fdfa6e194 tail:0x120 end:0x6c0 dev:team0 ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:213! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 1322 Comm: kworker/1:9 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: mld mld_ifc_work RIP: 0010:skb_panic+0x157/0x160 net/core/skbuff.c:213 Code: c7 60 9c 6f 8c 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 55 41 57 41 56 e8 ce 6a f5 ff 48 83 c4 20 90 <0f> 0b cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900040cf540 EFLAGS: 00010282 RAX: 0000000000000097 RBX: dffffc0000000000 RCX: 577f10acb7f51400 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 00000000000006c0 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bbae40 R12: ffff88805235f510 R13: ffff888058b43000 R14: ffff887fdfa6e194 R15: 0000000000000120 FS: 0000000000000000(0000) GS:ffff888125f21000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5ea09156c0 CR3: 00000000760f2000 CR4: 00000000003526f0 Call Trace: skb_under_panic net/core/skbuff.c:223 [inline] skb_push+0xc3/0xe0 net/core/skbuff.c:2641 ipgre_header+0x67/0x290 net/ipv4/ip_gre.c:897 dev_hard_header include/linux/netdevice.h:3436 [inline] neigh_connected_output+0x286/0x460 net/core/neighbour.c:1618 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247 NF_HOOK+0x9e/0x380 include/linux/netfilter.h:318 mld_sendpack+0x8d4/0xe60 net/ipv6/mcast.c:1855 mld_send_cr net/ipv6/mcast.c:2154 [inline] mld_ifc_work+0x83e/0xd60 net/ipv6/mcast.c:2693 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x157/0x160 net/core/skbuff.c:213 Code: c7 60 9c 6f 8c 48 8b 74 24 08 48 8b 54 24 10 8b 0c 24 44 8b 44 24 04 4d 89 e9 50 55 41 57 41 56 e8 ce 6a f5 ff 48 83 c4 20 90 <0f> 0b cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900040cf540 EFLAGS: 00010282 RAX: 0000000000000097 RBX: dffffc0000000000 RCX: 577f10acb7f51400 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 00000000000006c0 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff1bbae40 R12: ffff88805235f510 R13: ffff888058b43000 R14: ffff887fdfa6e194 R15: 0000000000000120 FS: 0000000000000000(0000) GS:ffff888125f21000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2de99d5d58 CR3: 00000000b0bfa000 CR4: 00000000003526f0 --- 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