From nobody Mon Jan 13 01:44:57 2025 X-Original-To: freebsd-net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4YWZnl0jpSz5kDww for ; Mon, 13 Jan 2025 01:44:59 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "smtp.freebsd.org", Issuer "R10" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4YWZnl08vCz4sMN for ; Mon, 13 Jan 2025 01:44:59 +0000 (UTC) (envelope-from kevans@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1736732699; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=DNuKsU7kztJJK1cRUx6k/PM/qSepJNdvltFRJZQlRSg=; b=IPEIqAbT4GzG2nY67SpbSewh9+yh8rU4Q54Mjdvc8S5tnU6Q1gDcoJYotzeoaY/8lcSYFZ ifYJMmOHtN3vZmsLhr5jZd8uwIRkYn3A1Z7A3cjHeVr8ihRFXTc1zpetwDNtJV16GTPJQX yfjKIQL5lbsYKFTHAhP66zJEJva7HE7ba+j0wr+Wck9aIGXLHENe9qPJCRZ+X+ud8diaxU tcp6UFkhJ63z+BC9YlHfL8AzzgLpzncL3ArFURUH1G74Tx9Qgkh/ectVEEFuS/TIpB/XiF w4OwDJgwZw7GfuVxFDVYiqA5u+7ENxq3nmt/QvUMRcZGINhaNP+QRcBpOJfISg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1736732699; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=DNuKsU7kztJJK1cRUx6k/PM/qSepJNdvltFRJZQlRSg=; b=vMZAleF0/DfgnMRFqUOD4ZHnjTkS6oSC2qmweSnuWIGTTy+OfnJVVFwg7qmKMdUdAhRrOs HrzzJmlZkXc7JAkoEbAOON/RUXEyBQQ7g8osHByoS38eGe0cpDG0Cy8zsSdqk9lXyQdXAq 0UFGEfNMUcSI+w1PO6YqXs7Acy13TWQqj0Ft8geTRkaMalbGDoNWiYZudm87tYtdtyedJ7 HQUYWhhynRjUkHG06tqeCnO33aXROG8o9gApSE8H8A4wnZ9dcwpu1hnLFjer8x3WRuPTKO fqhgJ88Fce+A+zwzdRh8YLmL9SvE2awbNJuX9lGqMNNDCjBQ1dzwor6g00L1jA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1736732699; a=rsa-sha256; cv=none; b=aymzZ45302HCuT8cpU0Uic15z8Ah4MtT5/R8E9/HRWznkkA7f41gbEKXrPzLlPBhh/VISm YiymGTh+Lvg2da7FSER6zKXLFh5ppTI8wktREmtqd2IC2WzW0dINFNChc0lbu+bjH1Bie3 y3ewpAM6MawVUxEDuV52WgtdSVIa80wTGioXZDdt3ZSw0qD24X25wobvU5RvevQ3WqayL1 HuKuYQr91QnyPT0iHA2/XFTny+OLodHVi9whnS6vMjtAm9agM0xkiFGtVt62RwAyD2/8jG ytbt9VSYc+01n/7fq0UizdAx/KdZKfuZ1pgGCHlaCKi35P7EW/lBzV/fo1B3Ow== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from [10.9.4.95] (unknown [209.182.120.176]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) (Authenticated sender: kevans/mail) by smtp.freebsd.org (Postfix) with ESMTPSA id 4YWZnk5f0Nz19r6 for ; Mon, 13 Jan 2025 01:44:58 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Message-ID: Date: Sun, 12 Jan 2025 19:44:57 -0600 List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@FreeBSD.org MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: freebsd-net@freebsd.org From: Kyle Evans Subject: panic: tcp_do_segment: sent too much Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi, I seem to have hit this panic during normal laptop usage with a -CURRENT running at 2832af7b4ea256b18ef4dbf2ff97a50765f0609a: panic: tcp_do_segment: sent too much cpuid = 5 time = 1736731772 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe015b74b9b0 vpanic() at vpanic+0x136/frame 0xfffffe015b74bae0 panic() at panic+0x43/frame 0xfffffe015b74bb40 tcp_do_segment() at tcp_do_segment+0x2998/frame 0xfffffe015b74bc20 tcp_input_with_port() at tcp_input_with_port+0x10f8/frame 0xfffffe015b74bd70 tcp_input() at tcp_input+0xb/frame 0xfffffe015b74bd80 ip_input() at ip_input+0x28f/frame 0xfffffe015b74bde0 swi_net() at swi_net+0x19b/frame 0xfffffe015b74be60 ithread_loop() at ithread_loop+0x266/frame 0xfffffe015b74bef0 fork_exit() at fork_exit+0x82/frame 0xfffffe015b74bf30 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe015b74bf30 Doing a little bit of inspection: (kgdb) print tp->t_dupacks $1 = 1 (kgdb) print tp->snd_limited $6 = 0 '\000' (kgdb) p/x tp->t_flags $4 = 0x10000264 (kgdb) print maxseg $1 = 1428 `sent` appears to be optimized out. As far as I know, I don't hit this one often, but I'm wondering if there's anything else useful I could extract here / if anyone has a theory about what happened. Thanks, Kyle Evans