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 1069E2309BE for ; Fri, 19 Dec 2025 14:42:24 +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=1766155346; cv=none; b=hM7AW8s6fMDSMI0jaTjiMaaytxHHTdm2r03mifneGKEEUw3zLsY03T3OOTdtjYnzqz3OTiiJBePvrLi4RlPipoGPeS50MW+Ws0DaO2Auo3ex9MTXUQ7uchqsZ+Y7pgO6xFcFCpYhnaxvKGC3I/vXO6Ya94R+KWmZUXbl6soJd5s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766155346; c=relaxed/simple; bh=6B4MyvS1hNUCMEQCMxIvsv5fBOybaaqj2n49TeA3h6Y=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=UCsX3q7AJmKsDeotDGUuKYnBJbUog1zxzT9nwm0VE3nFf+0csVhb3+gnS1EhefElULaGPWFOIugp11VkjfWwf5PJhuRm9p61G36y5mGHFD3Syl5RL7n80j4VTJc5qrg/ffidaJgRG9aU1152jMW4hKQee5lloER5x2vMaiePPjE= 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 006d021491bc7-65b153371efso4660320eaf.1 for ; Fri, 19 Dec 2025 06:42:24 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1766155344; x=1766760144; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=SVj2wIEZZjG0CS/zcv2WjJgasxf2+VT5dyS4d3f0uVc=; b=JGw4BcEyYPexo2kaK82ykmxhK1imaaWt+o1w6Ons2miU6b03H+kjCi9mcR0CmNv5VA WsPgLUkMtoFYU5b8KF1hu8Aqi+NI7X8gc4AShR9oJIZaX5iV0CON1bzpaHU0B87NH806 Yq/5S0BmoLrM2827kUCFnxV3+ljIB7RpFYKbjL2f9cnVt3RFZA9ZDmxT0eyrs0fxXgR7 Yv8OX/KIAO/hvEDuaxGE2ELIPcRFhTbgEN+i2f/1qGkTyqH2QT4PrhkmdbBcsD+rRerK Pl4QuD6SDL47yNoRsNhOxjBPxTvYqTHlc12la1p4h3ou/NQw6Cxw73DzBWBtPt8pyx1I KwYg== X-Forwarded-Encrypted: i=1; AJvYcCXPj8WkNnd8tDhktg5smDAombsaiGzEM/Q+vszvKA26xIFb/1iiYZBaC8297pV5rER3+qSXvNbcP6r3DNg=@vger.kernel.org X-Gm-Message-State: AOJu0YyEznahfdhrQ7j5o6j/s+mrUq5lgxDGGDOnHh8VicN6rE3zXqJd VOdKDwJjE7t7aC8vehcBH87VDkL2fXjuW7YdVUyfwGBJ1TMIqBbDIkCNE/lHwmsucBERbQA4jfk jzXjnk3+Ejoy1qmD84MkezRMox0tqdYgneDP6j6VXDOhiWltc+E7NMWx6iYQ= X-Google-Smtp-Source: AGHT+IHb29t8haQdVrH3Nj2h5m4tc30WKXaZQWALhg109mgIzQRUeYOm8f2M9hniN/DXeHX6BTZlA0rlKJFLt/dM8V5B6rcrP/sM Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:328c:b0:659:7cb2:78b1 with SMTP id 006d021491bc7-65cfe666db9mr2213580eaf.4.1766155343957; Fri, 19 Dec 2025 06:42:23 -0800 (PST) Date: Fri, 19 Dec 2025 06:42:23 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6945644f.a70a0220.207337.0113.GAE@google.com> Subject: [syzbot] [net?] [usb?] kernel BUG in dql_completed From: syzbot To: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, oneukum@suse.com, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: d358e5254674 Merge tag 'for-6.19/dm-changes' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1191799c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b60f8d9470fe9d28 dashboard link: https://syzkaller.appspot.com/bug?extid=5b55e49f8bbd84631a9c compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6023f764316a/disk-d358e525.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7d83b86d067e/vmlinux-d358e525.xz kernel image: https://storage.googleapis.com/syzbot-assets/7fa17a04a4c5/bzImage-d358e525.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5b55e49f8bbd84631a9c@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at lib/dynamic_queue_limits.c:99! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 5197 Comm: udevd Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:dql_completed+0xbe1/0xbf0 lib/dynamic_queue_limits.c:99 Code: 93 61 fd e9 ae fc ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c c2 fc ff ff 48 89 df e8 8a 92 61 fd e9 b5 fc ff ff e8 d0 40 fb fc 90 <0f> 0b 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 RSP: 0018:ffffc90000a08a70 EFLAGS: 00010246 RAX: ffffffff84c66fe0 RBX: 00000000000000f1 RCX: ffff88807df58000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 00000000000000f1 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000141154 R12: 1ffff1100fc56520 R13: 1ffff1100fc56519 R14: ffff88807e2b2904 R15: ffff88807e2b28c0 FS: 00007fdf0904e880(0000) GS:ffff888125f3a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000080159018 CR3: 000000007e786000 CR4: 00000000003526f0 Call Trace: netdev_tx_completed_queue include/linux/netdevice.h:3864 [inline] netdev_completed_queue include/linux/netdevice.h:3894 [inline] usbnet_bh+0x793/0x1020 drivers/net/usb/usbnet.c:1601 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340 bh_worker+0x2b1/0x600 kernel/workqueue.c:3611 tasklet_action+0xc/0x70 kernel/softirq.c:952 handle_softirqs+0x27d/0x850 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:mas_wr_append lib/maple_tree.c:3718 [inline] RIP: 0010:mas_wr_store_entry+0xe25/0x27b0 lib/maple_tree.c:3758 Code: 24 40 48 8b 4c 24 48 48 8d 1c c1 48 89 d8 48 c1 e8 03 42 80 3c 28 00 44 0f b6 7c 24 1c 74 08 48 89 df e8 3e 39 d5 f6 4c 89 33 <49> 8d 5c 24 48 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df RSP: 0018:ffffc90003106fe0 EFLAGS: 00000246 RAX: ffffc900031077cd RBX: 1ffff92000620ebd RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000000000008 RBP: ffffc90003107570 R08: ffff88807df58000 R09: 000000000000000a R10: 0000000000000009 R11: 0000000000000000 R12: ffffc900031075c0 R13: dffffc0000000000 R14: ffff88807e776640 R15: 0000000000000009 mas_insert+0x375/0x550 lib/maple_tree.c:4002 mas_alloc_cyclic+0x207/0x700 lib/maple_tree.c:4048 mtree_alloc_cyclic+0x181/0x220 lib/maple_tree.c:6092 simple_offset_add+0xdc/0x190 fs/libfs.c:297 shmem_mknod+0x232/0x360 mm/shmem.c:3884 lookup_open fs/namei.c:4440 [inline] open_last_lookups fs/namei.c:4540 [inline] path_openat+0x18bb/0x3dd0 fs/namei.c:4784 do_filp_open+0x1fa/0x410 fs/namei.c:4814 do_sys_openat2+0x121/0x200 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1447 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdf088a7407 Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP: 002b:00007fff05e7f490 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fdf0904e880 RCX: 00007fdf088a7407 RDX: 0000000000080141 RSI: 000055fcaafb702e RDI: ffffffffffffff9c RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000001a4 R11: 0000000000000202 R12: 00000000ffffffff R13: 00000000ffffffff R14: ffffffffffffffff R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dql_completed+0xbe1/0xbf0 lib/dynamic_queue_limits.c:99 Code: 93 61 fd e9 ae fc ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c c2 fc ff ff 48 89 df e8 8a 92 61 fd e9 b5 fc ff ff e8 d0 40 fb fc 90 <0f> 0b 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 RSP: 0018:ffffc90000a08a70 EFLAGS: 00010246 RAX: ffffffff84c66fe0 RBX: 00000000000000f1 RCX: ffff88807df58000 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 00000000000000f1 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000141154 R12: 1ffff1100fc56520 R13: 1ffff1100fc56519 R14: ffff88807e2b2904 R15: ffff88807e2b28c0 FS: 00007fdf0904e880(0000) GS:ffff888125f3a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000080159018 CR3: 000000007e786000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 24 40 and $0x40,%al 2: 48 8b 4c 24 48 mov 0x48(%rsp),%rcx 7: 48 8d 1c c1 lea (%rcx,%rax,8),%rbx b: 48 89 d8 mov %rbx,%rax e: 48 c1 e8 03 shr $0x3,%rax 12: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 17: 44 0f b6 7c 24 1c movzbl 0x1c(%rsp),%r15d 1d: 74 08 je 0x27 1f: 48 89 df mov %rbx,%rdi 22: e8 3e 39 d5 f6 call 0xf6d53965 27: 4c 89 33 mov %r14,(%rbx) * 2a: 49 8d 5c 24 48 lea 0x48(%r12),%rbx <-- trapping instruction 2f: 48 89 d8 mov %rbx,%rax 32: 48 c1 e8 03 shr $0x3,%rax 36: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 3b: 74 08 je 0x45 3d: 48 89 df mov %rbx,%rdi --- This report is generated by a bot. 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