From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-x536.google.com (mail-ed1-x536.google.com [IPv6:2a00:1450:4864:20::536]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 48F953B29E for ; Sun, 12 Aug 2018 04:17:32 -0400 (EDT) Received: by mail-ed1-x536.google.com with SMTP id h4-v6so6740182edi.6 for ; Sun, 12 Aug 2018 01:17:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heistp.net; s=google; h=from:mime-version:subject:message-id:date:to; bh=1e/fZM08fZ/D689wUH8gZ+lPOvT7xGMGSxN9eqftEEk=; b=cOy/c/FjPfNl8btMYfcY8ut5JDRmbTOmV4/LyGzmnXhFFHOUbOX0pYxLGSZl/UhzFd kOmAEcN/HjtSQbjRfHcLI6xZX/38BxUCqnl5oBJl2hPSzywSAe6JDhbKrdxvJ6AGgMYE kUMK1TH6XLBhSIsBIr16LRYCcuTBcdhmLyshx7ai+N0KrHJfLFqTukk0v5OQ8uMbD+YF uNX2uEsjt3uZWbh8kaLFMng6bpwoDhkgmjfCejBhuHcuEDsKL21w75Snix5d9QQUL3Gu BCRD5/q4HLY4M2BjAIUjOXp2Aybv0zcMoboqVWyUBCqfbLvE0s4Dcl7WaZNn/P90ILXx ev4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:mime-version:subject:message-id:date:to; bh=1e/fZM08fZ/D689wUH8gZ+lPOvT7xGMGSxN9eqftEEk=; b=lhwnWIxpiDLhavwp9xu/imS0csa9IK8pBxI6mhsQI+d7weKemVMnQQw9xoBwe8DaSX LSqC5WhO6TU6iUUjl8iKT9L+CWIr5rlp02Z0ZO1SvAIo/uZOyEeoDNnDqssnCSW7sONC OkvtrPOglXH6xR78Uy4m/xMoJq3eUnXBM9UQX/sa+oZK3YGWs/vzwdI0vYH9tbT+FMxn Eq+rCwjTALXlAkkx3KVMlDqzCDrGO0PtuHBiRa2S1SXUaiXJtbv1lDkG6TW0/6juL4m8 Xg68T66ogNshZGH+3ZThQrqyg3Va3sDh+Dhjtov1Q16NJTuI2zrMi6lIa3g/v8AkA+PO N6eQ== X-Gm-Message-State: AOUpUlFUHm8JgfnWq7EBVlyXXqsz765oVfVJ0IQUDNXMLHHGZBWFj4RS 3V7vxmAMafFXeohWj+2ksFzclfp5XO4= X-Google-Smtp-Source: AA+uWPyOXbceVAt66Gt7mjLcdNftuZCVOBMk+jUV3Pgvjbqi73PmApL1naOlLXfU1a1JHsuherW7NA== X-Received: by 2002:a50:984c:: with SMTP id h12-v6mr17510925edb.150.1534061850937; Sun, 12 Aug 2018 01:17:30 -0700 (PDT) Received: from tron.luk.heistp.net (h-1169.lbcfree.net. [185.193.85.130]) by smtp.gmail.com with ESMTPSA id c21-v6sm10577780eda.21.2018.08.12.01.17.29 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 12 Aug 2018 01:17:30 -0700 (PDT) From: Pete Heist Content-Type: multipart/mixed; boundary="Apple-Mail=_BD4A72F0-7FD8-45E1-B3ED-74C19C21F041" Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) Message-Id: Date: Sun, 12 Aug 2018 10:17:25 +0200 To: Cake List X-Mailer: Apple Mail (2.3445.9.1) Subject: [Cake] issue with Cake and bpf filter X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 12 Aug 2018 08:17:32 -0000 --Apple-Mail=_BD4A72F0-7FD8-45E1-B3ED-74C19C21F041 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 I=E2=80=99m seeing a panic (or infinite loop, not sure) when using Cake = (not fq_codel or sfq) with a simple bpf filter that just sets = skb->tc_classid to a fixed value. I haven=E2=80=99t investigated further = yet, but since I=E2=80=99m away from the computer more these days I = thought it better to post what I have so far in case someone wants to = look at it. The attached contains the code and setup script I=E2=80=99m using and a = README.txt with instructions on how to reproduce it and some more notes. = Be prepared that it=E2=80=99s something I=E2=80=99m doing wrong. :) = However, I also probably shouldn=E2=80=99t be able to cause this to = happen this easily either, regardless of where the actual issue is... Pete --Apple-Mail=_BD4A72F0-7FD8-45E1-B3ED-74C19C21F041 Content-Disposition: attachment; filename=simple-bpf.tgz Content-Type: application/octet-stream; x-unix-mode=0644; name="simple-bpf.tgz" Content-Transfer-Encoding: base64 H4sIAEvob1sAA+1YW3PbxhXWq/ZXHJPumNCI95tHKj1hacpWootrSfFDkkFAYEFuBCxo7EIUE6e/ vd8uSImirUk7td1pgzMjQcCe+32lRDyPeHUyD+s7XwoagH6/a57Nfrex+VzDTrMN6Pc6jV5np4GX Xn+Hul9Mow3IlPZSoh21VF4QC/kY3h+d/4+Cuo//qXfNQxHxzy7DBLjX6Twa/1ajt4p/t9fvIk+a 3Ua7vUONz67JJ+BPHv/RaOBHnpyyk5eDKPLZ6Ohk+OpiUD1vUfWdF0WM3WdILTmgjTef7T6tjEYO 4belcqgKX065JhxT1X+IzPyIe/KA7aYxVcPNs4T9t73w54WN+n+fqJqafQEZtv93H+///X5vq/93 up1GUf9fA8pP6hMh6xNPzRg7PhqOxgMuVbvN/v7y+GI0KPkYCiVWXr2F710/CXh0/0WF70uMJWFY ceg3tqt9eh8I5ROQ8HNDTy1PSpNEU+tFHZ/qMosi+vCBdJpx9juI5RatFwQf0T618thu7P2SpK4I Bj/foatZstjE/0B+ptFi2lQNqESlny1rTDbN023ecy/lEtzXbG3nCkTKfV31fC0SScnklwfNihTP D/JzY4HRYMuGLaU2Vdg+AgMR0g9Uetos0WBAJXizRD8dkp5xyXbxxni0hSE3EeRH50bEBsYBEBTP WRn0UOQ6swf1v9mtP2uO/cH8b/b6/fv6bzfN/O/2O0X9fw0oC+lHWcDpr5GQ2W3dRH/2gm1/nl9r 14/UwyMxT5NM85YhcnlkCVk5wBIpOV2MR5Wz4enYIdf1tE7FBKiuW6msyic/3KdM8cBxQCdCCVL6 25sj9+jqbMTKtOK0/mIp9qlWqzn0AH5k+FXZswwrrvv90B2+fXXhug4NqHKToKr3nDUTt1w2eKzM ZSBCxup7rF4nVE+UTKdCTklyHvBgn9ZWTniEcvVkQNoTES2EnqG+siAhVDS/5X7eMibT0p0J81RI fX1vQP5eCWP9Ke0fA2sVVX7717AfZWDAnyHFXQBU+OEneAXPw3+HgU49n7srO1aM9tEVf+VJuH5H LMvlTe8frhj87tx5G7WmhU82Jndh3WS+T34ilc413rNS8Nno6xppuf8O2V6dMZNg45MjF8/L4/Mz d2gfDjP4aM1u7AlZURgyvobt6tqdZGFIe+p64jB0akRdJuSnGHw2qMhkdEuhCAkPOSbgMosn6Nct wlcvnQgomi7ZLjhUX2gf9eApBUMGdDlyX7unw+/GFfvX2/Pzy31qQU8jZuW10oyn/MmPsmQ/p1xn qTSEUNs9/+7QTIFVmCLhYwRzBGrbxJPj0fjsYmzyuvTqzUnp8D9fnDf6/9vx8OXpuKZv9WfoK5tg +3/v0f7f6rSa6/7fbHba9v7X7Rf9/2vA8bMYCw03nc+TSHSV8bzHjbD42SrwVtsPcVTseofRM09T kHAln2maefM51owwSSleUa8XRcI3rIg17JakudI8yM+vJpnUGTWf1xqdWpNOLi8IG9X3p++wj9FR pjAgDphZ/L7JLObBP8qUSQ/sqx47MSOJ8gMCebfWqLYb1SmXPEV3Kbdb1RX/i9M3dDnL6NssolaP mv2DTuug06aryxG1Gs3ndPu85/Y6W49XZ1d1K4Ox1+j9OqGUY9QFmc+pgprPYuMu66AwTWKacS+w PSJK8dcSHQs5FUWYaweMNRx6m0mKDTY4TTIRBQ/2yRprOjQOhKb8AmawFO7QdjmssZZDw1Vnmifo JPs5K5XBUcskg3uXcGts5M+hJvwXkImEl/e2GmvnCqyYQ3+7UDs11nHogpu5lnphCL8lNwhsvhZX 5sZCrIgZlMWoExALnmLO07AN0q5D7xBGgSWYQr4wK3EiA7W/lkqJ72epQtjPEoQdbqjS8V18jzH0 MzhoaTKPSqM3V1i5lTeBx2iypGmGRCnlI3fG6SZegKh6E99imiAMPleKpkg94ygOLaB1s9H4C1US zFo/SbljdQ3J5HaU+ddL6tjz0LjLICiYQPZY4mphXQl062MTRtwKpPDN5MH4FppjN0jmhucCWV+D KedBEC33YUeQmPw3Voh1GVjBKJMUUyy99/unqgI6VBBC8lF5JuL2igOpKxoM1D2zv+99xMdcymp0 vBapwGgBRMg1mFDlDotSMZ1hHob27oM8niD2xoTXOWWOaUxbjUAvJ5vA+wsR4CwSsXhIYSShAkC0 noBwmtFfJ0gATRH3FPJlHRrDvWWsevDfoCq987QP0Zkd8ZCquAl3yp+BWRJzk13TdetZpAlerK7x 0mwOhqlJjoW3NJG017q13dp/QuMbKKm0iCITpoXJYxMpfjvH9mnrEM0NCWf+9L3MyhYKy0Xxr6gC CiiggAIKKKCAAgoooIACCijg/w3+CYiLtsoAKAAA --Apple-Mail=_BD4A72F0-7FD8-45E1-B3ED-74C19C21F041--