From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f200.google.com (mail-oi1-f200.google.com [209.85.167.200]) (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 CA341388396 for ; Tue, 22 Sep 2026 04:43:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790052206; cv=none; b=ekvaPBv09YAgLcE72V4DWxqDylq5QmQimdZvJAGOHP8R6TlHPrpdD0sPk0bU9CeitfWW6dhe+hiEUqvpALsYJ7gHr0FaNIPaIJ/RztNNlGE4B5dUZwn7HbaosuMA8OoRKVWJ4GdxIqdnu0m0/qGmxzkrwfs6dJuhjlNgW9nmvy4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790052206; c=relaxed/simple; bh=OQYTdW+feEtU0nT1xZhwdc+cpH45B0yaM48jILy8Y7s=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=Y/RMLPEji3+967/uT8n0+IszwedW15w+Aq9t2MzrCWfdhw4WKQFyWcxhdAR4K+WokOvSL3NDLbSG8C5ze9eZiG27JlsN/LQUnOTOwJKY5qUMk0RtY0MkArHMfYf+nDRToBKwVcv/uwRTstGLb/CqELfvisfhITmn9JC/BCb69KE= 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=209.85.167.200 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-oi1-f200.google.com with SMTP id 5614622812f47-4cb254da90eso5030845b6e.0 for ; Mon, 21 Sep 2026 21:43:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790052203; x=1790657003; h=content-type:cc: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=ii6CpxlMOU2YNsdl7Ju/KYaeAqAaiitDP3dlw9IiSoU=; b=FuwIkGWpnTQIqBlVm7M0V7q/wWoeo1QXV5qJwxKOngPivsoZdXI+t8luwJTJzCqVF7 f/6RPb07MTm/XUVw7lTfDXER2WKZcUKc4QZ45hYYXFUFBZ2NXrx0H0s08VfsiSvtq4DA MapVgy8ZekayUyz000KT1W8bApfKxQ0TKlhwLGOn6vnxaE3Wz3Y1UqkhsYHaoABOB2s+ hT85NvaoSW9sdYRqY3Mi8yx+JCIQrotZH7NVIoboRr7fGhjIQDMkZBdHYLL9ihPjsOZo yCE68uuOdpQJpAMH02KXpc6ngg9niHNTqyD2pTnKbMOxyTjbzK739Mj43Ab4VibiSC5m Vtiw== X-Forwarded-Encrypted: i=1; AKwUvBx6Icn85onj6+3FfOvLiTJza4S9pvMGjUZt6cFj/msrcYFJmYNCYcrBTyHHHnEecqrKS6kiH+LXfJasMms=@vger.kernel.org X-Gm-Message-State: AFuF++k6fkGjIdLn82GCNQjKk28GF/WWMzxSrJ8DdarKHufHyX36anHl itC9sZqA6PmE/72AS0mR4rDfEMYsotpnA1J71e+4w6VWTGoP2mbOE3CREWuJm0/mwP7rQDKs/cp g2qTIDMTGl2nKs72eubjwACQoj9+KuTBQJiA3ACmIUhFumtZz6+cnUSwSqdE= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:ee0b:0:b0:6bd:f79e:501c with SMTP id 006d021491bc7-6ca9ab437d8mr11629437eaf.16.1790052203652; Mon, 21 Sep 2026 21:43:23 -0700 (PDT) Date: Mon, 21 Sep 2026 21:43:23 -0700 In-Reply-To: <20260919221735.3708237-1-benquike@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ab2076b.e548f532.1ca396.0017.GAE@google.com> Subject: [syzbot ci] Re: af_unix: fix u->inq_len accounting in manage_oob() and unix_stream_read_skb() From: syzbot ci To: benquike@gmail.com, davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, kuniyu@google.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v1] af_unix: fix u->inq_len accounting in manage_oob() and unix_stream_read_skb() https://lore.kernel.org/all/20260919221735.3708237-1-benquike@gmail.com * [PATCH] af_unix: fix u->inq_len accounting in manage_oob() and unix_stream_read_skb() and found the following issue: kernel BUG in unix_stream_read_skb Full report is available here: https://ci.syzbot.org/series/0ffad94e-8c51-41d9-b85f-9793ff3deaf5 *** kernel BUG in unix_stream_read_skb tree: net-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git base: b5a051f6b840d48f159166ef073d3021989bfb50 arch: amd64 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 config: https://ci.syzbot.org/builds/127895ae-9f2e-46db-a972-bc6f975448e6/config skb linear: 00000100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 skb linear: 00000110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 skb linear: 00000120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ------------[ cut here ]------------ kernel BUG at ./include/linux/skbuff.h:2847! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 16941 Comm: syz.0.3527 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:skb_pull+0x1c4/0x1d0 Code: b2 8c f8 8b 44 24 04 89 43 70 48 c7 c7 c0 ba 22 8d 89 ee e8 9e 96 7c f7 48 c7 c7 00 bb 22 8d 48 89 de 31 d2 e8 7d 00 ff ff 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000629f758 EFLAGS: 00010282 RAX: ffffffff89aa3aaa RBX: ffff888107756780 RCX: 0000000000080000 RDX: ffffc90021fe7000 RSI: 000000000000b6ec RDI: 000000000000b6ed RBP: 0000000000001000 R08: ffff88823c624713 R09: 1ffff110478c48e2 R10: dffffc0000000000 R11: ffffed10478c48e3 R12: 0000000000008000 R13: dffffc0000000000 R14: 1ffff11020eeacfe R15: 0000000000007ec0 FS: 00007f4d8a7ef6c0(0000) GS:ffff8882a8cce000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000c4000 CR3: 000000002253a000 CR4: 00000000000006f0 Call Trace: unix_stream_read_skb+0x34a/0x500 sk_psock_verdict_data_ready+0x25f/0x690 unix_stream_sendmsg+0x84e/0xde0 sock_sendmsg_nosec+0x13a/0x180 ____sys_sendmsg+0x54e/0x850 ___sys_sendmsg+0x2a5/0x360 __x64_sys_sendmsg+0x1b1/0x290 do_syscall_64+0x166/0x520 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4d8999e159 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:00007f4d8a7ef028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4d89c26180 RCX: 00007f4d8999e159 RDX: 0000000000000000 RSI: 0000200000000500 RDI: 0000000000000005 RBP: 00007f4d89a3506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4d89c26218 R14: 00007f4d89c26180 R15: 00007ffd1de3bf98 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_pull+0x1c4/0x1d0 Code: b2 8c f8 8b 44 24 04 89 43 70 48 c7 c7 c0 ba 22 8d 89 ee e8 9e 96 7c f7 48 c7 c7 00 bb 22 8d 48 89 de 31 d2 e8 7d 00 ff ff 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000629f758 EFLAGS: 00010282 RAX: ffffffff89aa3aaa RBX: ffff888107756780 RCX: 0000000000080000 RDX: ffffc90021fe7000 RSI: 000000000000b6ec RDI: 000000000000b6ed RBP: 0000000000001000 R08: ffff88823c624713 R09: 1ffff110478c48e2 R10: dffffc0000000000 R11: ffffed10478c48e3 R12: 0000000000008000 R13: dffffc0000000000 R14: 1ffff11020eeacfe R15: 0000000000007ec0 FS: 00007f4d8a7ef6c0(0000) GS:ffff88818d6ce000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fda6ffeb840 CR3: 000000002253a000 CR4: 00000000000006f0 *** 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. To test a fix for this bug, please reply with `#syz test` (on a separate line) and attach the patch to the email. Notes: - The patch will be applied on top of the tested series (as an incremental fix). - To test a new version of the whole series, please send it directly to syzbot@lists.linux.dev. - Arguments like custom git repos and branches are not supported.