From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo2-f5.google.com (mail-oo2-f5.google.com [74.125.231.133]) (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 8D8CA46C844 for ; Tue, 22 Sep 2026 23:25:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790119549; cv=none; b=syckz0naKo08GK2hKAyzg1nJljxdlC2WP8TCs26W9UyAslYSTAYkJoEY1ZTnhsUdIOaf7OOYeoi7XGViyv8FgauVUORm5av6kPWi/6Qbs7OsDDjEIu4hmYsKIKwBqQA8IH2lNRTt9lTylLdXz5o/HYtQzk84ivZLAB1PnF+TmKc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790119549; c=relaxed/simple; bh=uH7vxHkVKKcpii8qgs07msHfGgkJGl9tsudcHAs05AY=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=XFJBr1Y+W71EWKQoH9kIoSjtkHMckou7aifZv888qjPfIAscoQe0mnezaidpP8nNY2iaMajubOy7iybiEKZiWq3dhkJaROYvmp0Ia5lROQJQF33fdWFCTnrimo/SlOyeEx60e3Lidr96LQLnXPwUnnbMHDvTQpcgilHZDWiwcxk= 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=74.125.231.133 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-oo2-f5.google.com with SMTP id 006d021491bc7-6c184d8081eso18354eaf.0 for ; Tue, 22 Sep 2026 16:25:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790119530; x=1790724330; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=Kl2ZXxQAeH8BEDvdB3GjRz7M3jT3/RNYuB+XsUsBvjE=; b=MqEtu5C4pfWSwihfci7AzSPYtPsrvey4Pf0b5xl5YvhFdbkW1QLf5MKElAHeBH3rH0 R8Tae3ralkS3cF/bS8Ukf1GcfwvB85sGYJ7iOjwDc+xRyWwsJN8fSIwYK4IwfhdpG31+ iXejIQCLi+6Ft1u8cDrYR04ZqFrdWJHc5jeLj9OSpWKdNtj/KWYIaD6MtZAVlF172ZEU 5cs+Jiyqx8rPCZV0RvU28SUBbqYZjBhQyWDwANmcLh1gaRilI/X7c8U/4FEW/Ekspq2e 37bq7VNNmYqs8/C548HCj6JQk8zPYw/y/1gmH6MOF/JqpQu/A0l66xLt+5BbkDCpmW46 AtwA== X-Forwarded-Encrypted: i=1; AKwUvBydJxyBFlwRnVl2mtA5rFFuy60UfWfYr4aU9l8172pTXtcEd7N3nybhocS1yhhSbxGlwW+BDnSufA4LvWg=@vger.kernel.org X-Gm-Message-State: AFuF++nt5TcwtWOS6ALbOexDFNaLYnwiPR1DrmUnnn7BLOlG44L4l+nb nL7954DJJrvcDz3qh32v0+cbKnAqD8fymmpu7uGbHDs9JYzWusDl8nSw4+2czanQzGXH0smOdGg pNsWzR5NtF36VeThY2Xd6fPyfONANNJ7WpO/BjN/+xtu0cJKemJq232IB/6A= 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:c8e:b0:6c2:21ab:ec92 with SMTP id 006d021491bc7-6d2d034466amr808545eaf.30.1790119530008; Tue, 22 Sep 2026 16:25:30 -0700 (PDT) Date: Tue, 22 Sep 2026 16:25:29 -0700 In-Reply-To: <6a85042a.4d75e56a.c9a88.001f.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ab30e69.3179f8cd.1e36b2.002c.GAE@google.com> Subject: Re: [syzbot] [net?] WARNING in vmxnet3_probe_device From: syzbot To: andrew+netdev@lunn.ch, andrew@lunn.ch, bcm-kernel-feedback-list@broadcom.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, ronak.doshi@broadcom.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: c4e9f74da438 Merge tag 'v7.3-p5' of git://git.kernel.org/p.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13688405580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2b924f079099ba6e dashboard link: https://syzkaller.appspot.com/bug?extid=e39090bc9b3cf457717f compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17c1b4c9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=144d7805580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-c4e9f74d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1fb74cbe085d/vmlinux-c4e9f74d.xz kernel image: https://storage.googleapis.com/syzbot-assets/ee8335337423/bzImage-c4e9f74d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e39090bc9b3cf457717f@syzkaller.appspotmail.com ------------[ cut here ]------------ vmxnet3 0000:00:00.0: rejecting DMA map of vmalloc memory WARNING: ./include/linux/dma-mapping.h:532 at dma_map_single_attrs include/linux/dma-mapping.h:531 [inline], CPU#0: syz.0.17/5475 WARNING: ./include/linux/dma-mapping.h:532 at vmxnet3_probe_device+0xab8/0x2e70 drivers/net/vmxnet3/vmxnet3_drv.c:4047, CPU#0: syz.0.17/5475 Modules linked in: CPU: 0 UID: 0 PID: 5475 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:dma_map_single_attrs include/linux/dma-mapping.h:531 [inline] RIP: 0010:vmxnet3_probe_device+0xb32/0x2e70 drivers/net/vmxnet3/vmxnet3_drv.c:4047 Code: 89 ff e8 e1 b3 f6 fa 4d 8b 2f eb 15 e8 37 0c 85 fa 41 bf 04 00 00 00 41 b6 03 eb 7d e8 27 0c 85 fa 48 89 df 4c 89 f6 4c 89 ea <67> 48 0f b9 3a 48 8b 04 24 48 05 88 c4 00 00 49 89 c6 48 c1 e8 03 RSP: 0018:ffffc900046777c0 EFLAGS: 00010246 RAX: 1ffff11003ece01a RBX: ffffffff9087fdf0 RCX: dffffc0000000000 RDX: ffff88801f3c32a0 RSI: ffffffff8fa99b40 RDI: ffffffff9087fdf0 RBP: ffffc90004677950 R08: 0000000000000003 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1003ece0b3 R12: 0000000000000001 R13: ffff88801f3c32a0 R14: ffffffff8fa99b40 R15: ffff88801f6700d0 FS: 00007f931f3316c0(0000) GS:ffff88808c2c0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000043cf1000 CR4: 0000000000352ef0 Call Trace: local_pci_probe drivers/pci/pci-driver.c:354 [inline] pci_call_probe drivers/pci/pci-driver.c:416 [inline] __pci_device_probe drivers/pci/pci-driver.c:478 [inline] pci_device_probe+0x48e/0xd10 drivers/pci/pci-driver.c:512 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x254/0xae0 drivers/base/dd.c:706 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868 device_driver_attach+0xe0/0x1d0 drivers/base/dd.c:1203 bind_store+0x1d0/0x220 drivers/base/bus.c:267 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x612/0xba0 fs/read_write.c:687 ksys_write+0x150/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f931e39e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f931f331028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f931e625fa0 RCX: 00007f931e39e159 RDX: 000000000000000c RSI: 0000200000000240 RDI: 0000000000000006 RBP: 00007f931f331090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f931e626038 R14: 00007f931e625fa0 R15: 00007fff4d3aed68 ---------------- Code disassembly (best guess): 0: 89 ff mov %edi,%edi 2: e8 e1 b3 f6 fa call 0xfaf6b3e8 7: 4d 8b 2f mov (%r15),%r13 a: eb 15 jmp 0x21 c: e8 37 0c 85 fa call 0xfa850c48 11: 41 bf 04 00 00 00 mov $0x4,%r15d 17: 41 b6 03 mov $0x3,%r14b 1a: eb 7d jmp 0x99 1c: e8 27 0c 85 fa call 0xfa850c48 21: 48 89 df mov %rbx,%rdi 24: 4c 89 f6 mov %r14,%rsi 27: 4c 89 ea mov %r13,%rdx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 8b 04 24 mov (%rsp),%rax 33: 48 05 88 c4 00 00 add $0xc488,%rax 39: 49 89 c6 mov %rax,%r14 3c: 48 c1 e8 03 shr $0x3,%rax --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.