From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f78.google.com (mail-oo1-f78.google.com [209.85.161.78]) (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 3518D4A21 for ; Tue, 20 May 2025 12:09:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747742978; cv=none; b=SDkA57ulJFb9fuye6v3QzoR/0FvjsQ4bMN4QvroWpsLQk1de4r7PBnYTr8FJl8n5sS0QIajV8ynPMOPLSTD2eGkBZroRxzZkxJ47oXX31j3EDLBcO+Cn8eSUbx02fsGDxkII3kPZiT0L1O79qLS8XaC6lZt6dwckheVAdNbuZH0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747742978; c=relaxed/simple; bh=4s1MXYKS4c2lwdmXpuoBhJEfVxuBazYKQs8LqDeA9PA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=myyawIOiFkR0l/19qk45JcWZcOtCIMYu3rd88fd5Rpkkqw6IU3uqQoV4/JRW8knKp7pbjxXqK3T4uRvazWBwC97rfpLYjZubAr5TtxZJ4chuoFGkF+N4siGQ0iTnt01v++N7vtdZ0wr5/3VXhp8LeZA9oYwGj29ntpgZgR7iPfo= 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=209.85.161.78 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-oo1-f78.google.com with SMTP id 006d021491bc7-606691c2afdso6222293eaf.0 for ; Tue, 20 May 2025 05:09:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747742975; x=1748347775; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=xf6oI+HpUV0v8ri6idGeDRM5S4U5dFh/3If6EnGC8YA=; b=iysW0P4GssXUouQiMiP49p09/TaCKnNDyka0X7ojg67F4mu8hOOlX5Xhb6E+FI5bIq PHDu2XSbHONFzKNVtI0y53z46iY8dLcK6WUCZ+nHbbWldceHaNRmCfAfkm3gLH+RYw68 fG5pRFdP5VRhmtZiT1zhPy1QJMJopEJMoMOn/akb+2Z4EzimiJ3M73WgjraL/2i8/ED0 JoDihmBDixdREodnZT1TR2DFCtq66gA7oPHmEpmUHTyuaZ4WGidmcpYB5Kd07jmog4YG PUywWx700/nS4Ci9tAMf4FVKsIuRrcmCao4auYXw44vLw9svtbPYdcPlHp98/+Paa5WZ 00HA== X-Forwarded-Encrypted: i=1; AJvYcCUNe4LgRpRlEc55TrHvSiai+BuPFP57H+Kq/vU7xUrG1Tp09tdnnK1n1Yp+QVLNjWxUrTxEh7g=@vger.kernel.org X-Gm-Message-State: AOJu0Yz/anPdE5qKZ6AQyPDW7zhk2B2CSpeVyu05GcIZcRaPd4pURY7o AMD+gqo4s0qfu5iHV28f3cn4QX7qIVcGp7Yf6nHfikRXuy6VxBN5Re8dC0Fod2WrXzQ14JcUBx3 SfMvKa2wJQ67B0bKfTxkAvOmz+pxxB/XtfjkTAWkqmIrUOVtF3Nq6dl5AEKg= X-Google-Smtp-Source: AGHT+IE8VLuOxtSktBxAWPe05KDrddF5+NgoTcwjcpJwHgXR/bx9yzCIOiAZxEErBcNP8YB1x/P3Ms0kEyXm7YLwGJ1oeEjF1xim Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:388b:b0:85b:35b1:53b4 with SMTP id ca18e2360f4ac-86a24cd237cmr1915462439f.12.1747742964315; Tue, 20 May 2025 05:09:24 -0700 (PDT) Date: Tue, 20 May 2025 05:09:24 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <682c70f4.050a0220.ade60.09ba.GAE@google.com> Subject: [syzbot] [net?] BUG: unable to handle kernel paging request in bond_rr_gen_slave_id (2) 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: fee3e843b309 Merge tag 'bcachefs-2025-05-15' of git://evil.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15f342d4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=30181bfb60dbb0a9 dashboard link: https://syzkaller.appspot.com/bug?extid=e224b9d5803638de57d9 compiler: gcc (Debian 12.2.0-14) 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-fee3e843.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bad9badea84a/vmlinux-fee3e843.xz kernel image: https://storage.googleapis.com/syzbot-assets/9aae70a5a85a/bzImage-fee3e843.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e224b9d5803638de57d9@syzkaller.appspotmail.com BUG: unable to handle page fault for address: ffff8880d6bdf000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 1b001067 P4D 1b001067 PUD 0 Oops: Oops: 0002 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 12899 Comm: syz.2.2035 Not tainted 6.15.0-rc6-syzkaller-00188-gfee3e843b309 #0 PREEMPT(full) 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+0x1df/0x260 drivers/net/bonding/bond_main.c:4996 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 b8 af 53 fb 83 c3 01 89 d8 5b 5d 41 5c 41 5d 41 5e RSP: 0018:ffffc90003c5f650 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90007111000 RDX: 1ffff110092e69ce RSI: ffffffff86679653 RDI: ffff888049734e70 RBP: ffff888049734000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888049734d80 R13: 0000000000000000 R14: ffff888049734d80 R15: ffffc90003c5f9c0 FS: 00007fd2ddf556c0(0000) GS:ffff8880d6bdf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880d6bdf000 CR3: 000000004bfa9000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bond_xdp_xmit_roundrobin_slave_get drivers/net/bonding/bond_main.c:5083 [inline] bond_xdp_get_xmit_slave+0x2a9/0x6b0 drivers/net/bonding/bond_main.c:5622 xdp_master_redirect+0x15e/0x330 net/core/filter.c:4349 bpf_prog_run_xdp include/net/xdp.h:657 [inline] xdp_test_run_batch.constprop.0+0x18c8/0x1f10 net/bpf/test_run.c:318 bpf_test_run_xdp_live+0x34d/0x500 net/bpf/test_run.c:390 bpf_prog_test_run_xdp+0x824/0x1540 net/bpf/test_run.c:1316 bpf_prog_test_run kernel/bpf/syscall.c:4427 [inline] __sys_bpf+0x1488/0x4d80 kernel/bpf/syscall.c:5852 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5939 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd2dd18e969 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:00007fd2ddf55038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fd2dd3b5fa0 RCX: 00007fd2dd18e969 RDX: 0000000000000048 RSI: 0000200000000600 RDI: 000000000000000a RBP: 00007fd2dd210ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd2dd3b5fa0 R15: 00007ffc29f1f808 Modules linked in: CR2: ffff8880d6bdf000 ---[ end trace 0000000000000000 ]--- RIP: 0010:bond_rr_gen_slave_id+0x1df/0x260 drivers/net/bonding/bond_main.c:4996 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 b8 af 53 fb 83 c3 01 89 d8 5b 5d 41 5c 41 5d 41 5e RSP: 0018:ffffc90003c5f650 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90007111000 RDX: 1ffff110092e69ce RSI: ffffffff86679653 RDI: ffff888049734e70 RBP: ffff888049734000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888049734d80 R13: 0000000000000000 R14: ffff888049734d80 R15: ffffc90003c5f9c0 FS: 00007fd2ddf556c0(0000) GS:ffff8880d6bdf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8880d6bdf000 CR3: 000000004bfa9000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 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 b8 af 53 fb call 0xfb53afe7 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