From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f70.google.com (mail-oo1-f70.google.com [209.85.161.70]) (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 2CB3F2264A8 for ; Fri, 13 Feb 2026 20:08:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771013320; cv=none; b=Qh9pKNlv8zR7+HJZCoiFGUnZ8NHZ8QmSNVbcDHv+IwK1QvfNOPpE8q+l7KE2uqfNyOxk2BL4fgdfBGy+roFAaVdgP1OByGCqpjC39Y5Q4N+58Uuk8Lq8lpzYZoD5sJlnEQmSYcqgtIARArStXKaa9q5Y5CHIxYTENcA0FVlZHPI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771013320; c=relaxed/simple; bh=bZSP6V9g5g+qprZyGJmiB7+Lw0gCpkUdsfLlJnZ+NFs=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=u1PGWyMkRUCoAiVGj9Ga8ErFx5QHkghPgkWGxDqarPZKk67jQyHci4E867U15Kaeo/jZX4bozxCCSSQW30XXQQy2y4sWsHpZD5i64gSSuXtOVPH/R/cRdQ7TsRnyKbqBpaXQsH2L/Oikk9AmlnvesLXf4qGcXs+qWXYm0iFHpuU= 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=209.85.161.70 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-f70.google.com with SMTP id 006d021491bc7-66304fd62ebso11770459eaf.3 for ; Fri, 13 Feb 2026 12:08:39 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771013318; x=1771618118; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=0V7FdcC+V6f1rmRIkiWlvNKW04owJrAfo7ISDL37uvg=; b=pK+nmQCMMykpBmBmPa/fPQkcgPMv0Dzspw+4UBfLKDbx2sMT+ye09/zDROajOZHpM9 57TxBz2t0qx5WLJKS7sdV8u3Y/9ZQc8sgdtq4vaxYWTFFmcDZVmDo2Qfb4sIEgXS7Mop ihMp1vd7Oc7B8ZxQBeZrQqzOqOXHyBInwm86Uzkq+oSBOQnYcrkScBti2SFXn+QxdonW kOGBJwDnPcITXGzJdKXWKYivFDYHF8Ym6mQtpI6Y+2HBHc3UiKhGdEQv9v+oi4otDUfn /MFLjxTZbCzWKjRTSTYAQslzqwm7eU+yGORPnnYqeNVTq1Itp22BMB9t5u7OdqT/4s4j P9YQ== X-Forwarded-Encrypted: i=1; AJvYcCVh/wCu+vIqDOSN07JMWV4vTtNNiBPyDKNV0DzOJkHdh2rRM2zpFQuFeJfrnR/8FKAqU9RUGjc=@vger.kernel.org X-Gm-Message-State: AOJu0Yy/KNoJCbl7NiWbXEQUpXH39s2jLvva4W1ETPLznAKIHfbLKOfh W9EEJcKlVhPZfihgiwgvnQRylU/aKJyoZmZA1xkKkwAmOE+5UlBW63NfLCqrHQUohQ+Tsv3SGKg nfbMlMDpFW2z/4jFR+YD6qMAhkGt70hvd5xRb0YEVMC455MnKMV76/EIsxRk= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4910:b0:675:a193:b9a7 with SMTP id 006d021491bc7-67763a435aemr1158967eaf.0.1771013318418; Fri, 13 Feb 2026 12:08:38 -0800 (PST) Date: Fri, 13 Feb 2026 12:08:38 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <698f84c6.a70a0220.2c38d7.00cc.GAE@google.com> Subject: [syzbot] [net?] BUG: unable to handle kernel paging request in bond_rr_gen_slave_id (3) From: syzbot To: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, jv@jvosburgh.net, 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: 2061f18ad76e Merge tag 'caps-pr-20251204' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15a27192580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c3dd7b11863a05ae dashboard link: https://syzkaller.appspot.com/bug?extid=80e046b8da2820b6ba73 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-2061f18a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c6a2ca6b83cd/vmlinux-2061f18a.xz kernel image: https://storage.googleapis.com/syzbot-assets/e0719cd80772/bzImage-2061f18a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+80e046b8da2820b6ba73@syzkaller.appspotmail.com BUG: unable to handle page fault for address: ffff8880d6b60000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 1b201067 P4D 1b201067 PUD 0 Oops: Oops: 0002 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 18510 Comm: syz.7.3743 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:bond_rr_gen_slave_id+0x1d5/0x250 drivers/net/bonding/bond_main.c:4836 Code: bc 24 f0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 7a 49 8b 84 24 f0 00 00 00 bb 01 00 00 00 <65> 0f c1 18 e8 82 f5 73 fb 83 c3 01 89 d8 5b 5d 41 5c 41 5d 41 5e RSP: 0018:ffffc900039d75d0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90034e9f000 RDX: 1ffff1100c6b61ce RSI: ffffffff864a3089 RDI: ffff8880635b0e70 RBP: ffff8880635b0000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000001 R11: 000000000ac0d5af R12: ffff8880635b0d80 R13: 0000000000008f00 R14: ffff8880635b0d80 R15: dffffc0000000000 FS: 00007f96076d66c0(0000) GS:ffff8880d6b60000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880d6b60000 CR3: 0000000113c4b000 CR4: 0000000000352ef0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: bond_xdp_xmit_roundrobin_slave_get drivers/net/bonding/bond_main.c:4923 [inline] bond_xdp_get_xmit_slave+0x2a9/0x6b0 drivers/net/bonding/bond_main.c:5506 xdp_master_redirect+0x161/0x330 net/core/filter.c:4388 bpf_prog_run_xdp include/net/xdp.h:700 [inline] xdp_test_run_batch.constprop.0+0x14ce/0x1b20 net/bpf/test_run.c:307 bpf_test_run_xdp_live+0x365/0x770 net/bpf/test_run.c:379 bpf_prog_test_run_xdp+0xd3d/0x1660 net/bpf/test_run.c:1388 bpf_prog_test_run kernel/bpf/syscall.c:4703 [inline] __sys_bpf+0x1035/0x4980 kernel/bpf/syscall.c:6182 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline] __se_sys_bpf kernel/bpf/syscall.c:6272 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:6272 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f960678f7c9 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:00007f96076d6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f96069e5fa0 RCX: 00007f960678f7c9 RDX: 0000000000000050 RSI: 0000200000000600 RDI: 000000000000000a RBP: 00007f9606813f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f96069e6038 R14: 00007f96069e5fa0 R15: 00007ffd7a8f7488 Modules linked in: CR2: ffff8880d6b60000 ---[ end trace 0000000000000000 ]--- RIP: 0010:bond_rr_gen_slave_id+0x1d5/0x250 drivers/net/bonding/bond_main.c:4836 Code: bc 24 f0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 7a 49 8b 84 24 f0 00 00 00 bb 01 00 00 00 <65> 0f c1 18 e8 82 f5 73 fb 83 c3 01 89 d8 5b 5d 41 5c 41 5d 41 5e RSP: 0018:ffffc900039d75d0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90034e9f000 RDX: 1ffff1100c6b61ce RSI: ffffffff864a3089 RDI: ffff8880635b0e70 RBP: ffff8880635b0000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000001 R11: 000000000ac0d5af R12: ffff8880635b0d80 R13: 0000000000008f00 R14: ffff8880635b0d80 R15: dffffc0000000000 FS: 00007f96076d66c0(0000) GS:ffff8880d6b60000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880d6b60000 CR3: 0000000113c4b000 CR4: 0000000000352ef0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 00 00 add %al,(%rax) 2: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 9: fc ff df c: 48 89 fa mov %rdi,%rdx f: 48 c1 ea 03 shr $0x3,%rdx 13: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 17: 75 7a jne 0x93 19: 49 8b 84 24 f0 00 00 mov 0xf0(%r12),%rax 20: 00 21: bb 01 00 00 00 mov $0x1,%ebx * 26: 65 0f c1 18 xadd %ebx,%gs:(%rax) <-- trapping instruction 2a: e8 82 f5 73 fb call 0xfb73f5b1 2f: 83 c3 01 add $0x1,%ebx 32: 89 d8 mov %ebx,%eax 34: 5b pop %rbx 35: 5d pop %rbp 36: 41 5c pop %r12 38: 41 5d pop %r13 3a: 41 5e pop %r14 --- 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