From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f80.google.com (mail-io1-f80.google.com [209.85.166.80]) (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 C039829A301 for ; Thu, 3 Jul 2025 08:17:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751530646; cv=none; b=AUEBr22Q356HEd8GF2T9J5tRnvWT2o1uW6I4oTj1Ccr4xIN5hl/HodNwxDy/Y+kocqjr/fVtY5Xt7+jp3uuupEwdKPadTQyF+/h8E+u4fKRv9sTSCPovde1VNyyCmKhw94W8ZqZKNqAtUd7UJfzN0LfAHzhfpPsGzvc+3h9DDAw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751530646; c=relaxed/simple; bh=ghgl+VY8cTjRrm/NDbWTnhmpUoTqUAJFdV6gZOgBmKs=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=EFqU50bfDpYYp+DRpvV4H7GB+Mx31VnN7XL3W92wbpL360Uv4RQwIhgk9395sttnfgzkbajzlI/udINaMx0eAfaieLQeBSUZAYbD/3s5QDpMAGG57oZ2pZK91TsjUVjJzKLub6yFXRvMEuqS+ogaiz4usikBfhpnf0m/e4Mnb+M= 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=209.85.166.80 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-f80.google.com with SMTP id ca18e2360f4ac-86cfccca327so1567027339f.2 for ; Thu, 03 Jul 2025 01:17:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1751530644; x=1752135444; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=+6GNCHNANxvo+ZqabR32huRxOQaWVbJ75GQutnj3xcQ=; b=wgIBBKZzub7PZw6AEAd/Q6wigYLkeKIGJp/II8glZR15iiGX9zSkrongjcLkFc9KVw rG4Tlm4jdAVNlPGUZboZdwsHpi0rcRfjyANyIt4tEXWoEm5Xddi8ht0luhbc1dkHYmxH V6f8qoBBvfRfzCJJlNrkjL0DaD0GxopEM1Ygh685qjJaNCrrRZS/jWqPJ4l5TrrsxRR3 5Hr0QO6kewY7wFnvXF7DeDgxlZh6I0ArXk4TxS5mlVY0eIY3JKMmwm17dk3KFVhzJnit MtuW7WEx0e2Th5twlMTf14SYx2ED5ePYNA7qzep2w8Q0MS5MVG76ZidREVo4Vjl/NutF IJmg== X-Forwarded-Encrypted: i=1; AJvYcCWkSecb4aEVjplKAZeOS6y/qQhy0FJ1qdmXCMjOTrHjqRu85rHJ78CTPIUaO+Xii7HEK01d2C+KNLqVOxQ=@vger.kernel.org X-Gm-Message-State: AOJu0YyXXXPuic50lbgZf/u8gcTp8c9SksyyQSQSinr6wGYUGUueELMa +bMTsexBp8GMsH4Nb4Ax5ytbN9HYpXcfIT4p08E7ZhP6rJAKI/XDTgL/tHjsSg0EWVQqMSmLm/w GKnNGR4drV10C7642pMVcwf0h3vDr/OUZqdbCaKO1mVRKwFYsLSpSY6Msdj0= X-Google-Smtp-Source: AGHT+IGGfqW4UJPNgdNpUu1K71s3vcT3hKkg+pELHwVxlFchLFC9soUMq5XL/LrewkXhhv8KEOGAl3zSgSA0p494hTMb111Gj7Wv Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:2748:b0:876:bdb0:db43 with SMTP id ca18e2360f4ac-876c6a99ee9mr744868139f.14.1751530643895; Thu, 03 Jul 2025 01:17:23 -0700 (PDT) Date: Thu, 03 Jul 2025 01:17:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68663c93.a70a0220.5d25f.0857.GAE@google.com> Subject: [syzbot] [net?] general protection fault in htb_qlen_notify From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: bd475eeaaf3c Merge branch '200GbE' of git://git.kernel.org.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=1323b770580000 kernel config: https://syzkaller.appspot.com/x/.config?x=36b0e72cad5298f8 dashboard link: https://syzkaller.appspot.com/bug?extid=d8b58d7b0ad89a678a16 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d59bc82a55e0/disk-bd475eea.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2a83759fceb6/vmlinux-bd475eea.xz kernel image: https://storage.googleapis.com/syzbot-assets/07576fd8e432/bzImage-bd475eea.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d8b58d7b0ad89a678a16@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000035: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000001a8-0x00000000000001af] CPU: 0 UID: 0 PID: 7207 Comm: syz.3.362 Not tainted 6.16.0-rc3-syzkaller-00144-gbd475eeaaf3c #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:htb_deactivate net/sched/sch_htb.c:613 [inline] RIP: 0010:htb_qlen_notify+0x31/0xc0 net/sched/sch_htb.c:1489 Code: 41 56 41 55 41 54 53 49 89 f6 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 3d c6 46 f8 49 8d 9e a8 01 00 00 49 89 dd 49 c1 ed 03 <43> 0f b6 44 25 00 84 c0 75 4d 8b 2b 31 ff 89 ee e8 5a ca 46 f8 85 RSP: 0018:ffffc90003c6efb0 EFLAGS: 00010206 RAX: ffffffff89798833 RBX: 00000000000001a8 RCX: ffff8880585d9e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888058d42000 RBP: dffffc0000000000 R08: ffff8880585d9e00 R09: 0000000000000002 R10: 00000000ffffffff R11: ffffffff89798810 R12: dffffc0000000000 R13: 0000000000000035 R14: 0000000000000000 R15: ffff888058d42000 FS: 00007f22a32406c0(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f22a31ddd58 CR3: 000000007c196000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: qdisc_tree_reduce_backlog+0x29c/0x480 net/sched/sch_api.c:811 fq_change+0x1519/0x1f50 net/sched/sch_fq.c:1147 fq_init+0x699/0x960 net/sched/sch_fq.c:1201 qdisc_create+0x7ac/0xea0 net/sched/sch_api.c:1324 __tc_modify_qdisc net/sched/sch_api.c:1749 [inline] tc_modify_qdisc+0x1426/0x2010 net/sched/sch_api.c:1813 rtnetlink_rcv_msg+0x779/0xb70 net/core/rtnetlink.c:6953 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x75b/0x8d0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x21c/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+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f22a238e929 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:00007f22a3240038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f22a25b5fa0 RCX: 00007f22a238e929 RDX: 0000000000000800 RSI: 0000200000000100 RDI: 0000000000000008 RBP: 00007f22a2410b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f22a25b5fa0 R15: 00007fffce377518 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:htb_deactivate net/sched/sch_htb.c:613 [inline] RIP: 0010:htb_qlen_notify+0x31/0xc0 net/sched/sch_htb.c:1489 Code: 41 56 41 55 41 54 53 49 89 f6 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 3d c6 46 f8 49 8d 9e a8 01 00 00 49 89 dd 49 c1 ed 03 <43> 0f b6 44 25 00 84 c0 75 4d 8b 2b 31 ff 89 ee e8 5a ca 46 f8 85 RSP: 0018:ffffc90003c6efb0 EFLAGS: 00010206 RAX: ffffffff89798833 RBX: 00000000000001a8 RCX: ffff8880585d9e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888058d42000 RBP: dffffc0000000000 R08: ffff8880585d9e00 R09: 0000000000000002 R10: 00000000ffffffff R11: ffffffff89798810 R12: dffffc0000000000 R13: 0000000000000035 R14: 0000000000000000 R15: ffff888058d42000 FS: 00007f22a32406c0(0000) GS:ffff888125c50000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f22a31ddd58 CR3: 000000007c196000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 41 56 push %r14 2: 41 55 push %r13 4: 41 54 push %r12 6: 53 push %rbx 7: 49 89 f6 mov %rsi,%r14 a: 49 89 ff mov %rdi,%r15 d: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 14: fc ff df 17: e8 3d c6 46 f8 call 0xf846c659 1c: 49 8d 9e a8 01 00 00 lea 0x1a8(%r14),%rbx 23: 49 89 dd mov %rbx,%r13 26: 49 c1 ed 03 shr $0x3,%r13 * 2a: 43 0f b6 44 25 00 movzbl 0x0(%r13,%r12,1),%eax <-- trapping instruction 30: 84 c0 test %al,%al 32: 75 4d jne 0x81 34: 8b 2b mov (%rbx),%ebp 36: 31 ff xor %edi,%edi 38: 89 ee mov %ebp,%esi 3a: e8 5a ca 46 f8 call 0xf846ca99 3f: 85 .byte 0x85 --- 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