From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f72.google.com (mail-oa1-f72.google.com [209.85.160.72]) (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 2C44728850B for ; Thu, 29 Jan 2026 12:35:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769690133; cv=none; b=VzK8tG1BtYh/BNzXpufPk9ZMsjZKYanej3+mPgYdq97G1CzPzHn3YmONC1HJlLXyoMjtZ7mIMVhtZA5DwGKKncGXJzOXDGmICe0gyzfMo7wxEElUZChWxbLsIkDvD2fgqF39hznV9nKQighS5/cUBEx1CCBLQhwcWN6A6LjuXeU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769690133; c=relaxed/simple; bh=xfEmrFz8T6pkRFvgSBZh3SBoVdlcOji5lA5LDzwMmAc=; h=MIME-Version:Date:Message-ID:Subject:From:To:Cc:Content-Type; b=cvWsxZKDKFA5V53AdNy9l1g6fThHwTtz4AxNoUSsMG27/NzvwvSOrbW/LICTLfM6lGQ3KY8vbGMLWpt1jk+UM2p1h3QL/u9HrckYpR02z7qHtEAdA1tCLdn9AjwYa7zwfobnfPkTCRwJQv/dBwjjLOcU7CMpVMSR+JNRAVa096I= 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=209.85.160.72 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-oa1-f72.google.com with SMTP id 586e51a60fabf-402d5d2706fso1258013fac.3 for ; Thu, 29 Jan 2026 04:35:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769690131; x=1770294931; h=content-transfer-encoding:cc:to:from:subject:message-id:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=2eKTjZuHYBH13uKO+TY3Em3zWx1kaW0lRCy50D6Ydoo=; b=dRIVrQZ8QyDj29lPPzVD7QPOpSbM42Vyc5wQpP2hR6WSJYF3pwNzyCkjCtOfU0r9lP fM7t2uruI1HhIKDm9+OJi8xZuREhrVmizCLNQze286hY5OKpI5QRJEOUB1KKoVxYI2qc M/WofuxtVJQoSQ+YwYSMYeukdarlJDb1DbELl3UmFiROD36gIjINugecG09divxV8Dg2 C1Jss/jQQRazLfAAzhoVGwFe4/mYw1HO30NKhnlA4JuboDY+7bzNXxZObbCzI8+84Isv THbsrIHWa5Lh+zJd54qFjiZQgq3IX4V1KMDuhiJMF6L58VBAQ4nXgiwmkMDH8RNLNwvs wRGQ== X-Gm-Message-State: AOJu0Ywa1Doy18BRUbbYmlNoyiZalW+VSkohLN5O0qSOUUgr9x/6jVk+ /ui2eJSwfmYFyWRddMmbtqQfflpUG/4RKLBFO3pIZaI8TR1Lyul19sCCrVwgRN9ewcY0T78yEe+ m8E3GqurxsvCNTt5Y4U7caW2QG3PW4zhCKVXiJ2UXWLlWSf4HSe9PhRdt3fA= Precedence: bulk X-Mailing-List: syzbot@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1609:b0:65c:469d:33d9 with SMTP id 006d021491bc7-662f20e406amr4966163eaf.69.1769690131070; Thu, 29 Jan 2026 04:35:31 -0800 (PST) Date: Thu, 29 Jan 2026 04:35:31 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <697b5413.a00a0220.35f26.0008.GAE@google.com> Subject: [moderation/CI] Re: virtio-net: add flow filter for receive timestamps From: syzbot ci To: syzkaller-upstream-moderation@googlegroups.com Cc: syzbot@lists.linux.dev Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable syzbot ci has tested the following series [v2] virtio-net: add flow filter for receive timestamps https://lore.kernel.org/all/20260129-v6-7-topic-virtio-net-ptp-v2-0-30a27dc= 52760@pengutronix.de * [PATCH RFC v2 1/2] tun: support rx-tstamp * [PATCH RFC v2 2/2] virtio-net: support receive timestamp and found the following issue: WARNING in __copy_overflow Full report is available here: https://ci.syzbot.org/series/0b35c8c9-603b-4126-ac04-0095faadb2f5 *** WARNING in __copy_overflow tree: net-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/= net-next.git base: ffeafa65b2b26df2f5b5a6118d3174f17bd12ec5 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp= 1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/d8316da2-2688-4d74-bbf4-e8412e24d10= 6/config C repro: https://ci.syzbot.org/findings/96af937a-787b-4fd5-baef-529fc80e0= bb7/c_repro syz repro: https://ci.syzbot.org/findings/96af937a-787b-4fd5-baef-529fc80e0= bb7/syz_repro ------------[ cut here ]------------ Buffer overflow detected (32 < 1840)! WARNING: mm/maccess.c:234 at __copy_overflow+0x17/0x30 mm/maccess.c:234, CP= U#0: syz.0.17/5993 Modules linked in: CPU: 0 UID: 0 PID: 5993 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(ful= l)=20 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16= .2-1 04/01/2014 RIP: 0010:__copy_overflow+0x1c/0x30 mm/maccess.c:234 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 53 48 89 f3 = 89 fd e8 60 b1 c4 ff 48 8d 3d 39 25 d5 0d 89 ee 48 89 da <67> 48 0f b9 3a 5= b 5d c3 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 RSP: 0018:ffffc90003b97888 EFLAGS: 00010293 RAX: ffffffff81fdcf50 RBX: 0000000000000730 RCX: ffff88810ccd9d40 RDX: 0000000000000730 RSI: 0000000000000020 RDI: ffffffff8fd2f490 RBP: 0000000000000020 R08: ffffffff8fcec777 R09: 1ffffffff1f9d8ee R10: dffffc0000000000 R11: ffffffff81742230 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000730 R15: 1ffff92000772f30 FS: 00007f08c446a6c0(0000) GS:ffff88818e32d000(0000) knlGS:000000000000000= 0 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f08c4448ff8 CR3: 000000010cec2000 CR4: 00000000000006f0 Call Trace: copy_overflow include/linux/ucopysize.h:41 [inline] check_copy_size include/linux/ucopysize.h:50 [inline] copy_to_iter include/linux/uio.h:219 [inline] tun_put_user drivers/net/tun.c:2089 [inline] tun_do_read+0x1f44/0x28a0 drivers/net/tun.c:2190 tun_chr_read_iter+0x13b/0x260 drivers/net/tun.c:2214 do_iter_readv_writev+0x619/0x8c0 fs/read_write.c:-1 vfs_readv+0x288/0x840 fs/read_write.c:1018 do_readv+0x154/0x2e0 fs/read_write.c:1080 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f08c359acb9 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 f= f 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f08c446a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f08c3815fa0 RCX: 00007f08c359acb9 RDX: 0000000000000002 RSI: 0000200000000080 RDI: 0000000000000003 RBP: 00007f08c3608bf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f08c3816038 R14: 00007f08c3815fa0 R15: 00007fff6491da78 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: f3 0f 1e fa endbr64 12: 55 push %rbp 13: 53 push %rbx 14: 48 89 f3 mov %rsi,%rbx 17: 89 fd mov %edi,%ebp 19: e8 60 b1 c4 ff call 0xffc4b17e 1e: 48 8d 3d 39 25 d5 0d lea 0xdd52539(%rip),%rdi # 0xdd5255e 25: 89 ee mov %ebp,%esi 27: 48 89 da mov %rbx,%rdx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: c3 ret 32: cc int3 33: cc int3 34: cc int3 35: cc int3 36: cc int3 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: cc int3 3c: cc int3 3d: cc int3 3e: 90 nop 3f: 90 nop *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. The email will later be sent to: [andrew@lunn.ch davem@davemloft.net edumazet@google.com eperezma@redhat.com= jasowang@redhat.com kuba@kernel.org linux-kernel@vger.kernel.org mst@redha= t.com netdev@vger.kernel.org pabeni@redhat.com richardcochran@gmail.com s.t= rumtrar@pengutronix.de virtualization@lists.linux.dev willemdebruijn.kernel= @gmail.com xuanzhuo@linux.alibaba.com] If the report looks fine to you, reply with: #syz upstream If the report is a false positive, reply with #syz invalid