From owner-freebsd-net@freebsd.org Mon May 3 19:45:54 2021 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 669EB63BBF0 for ; Mon, 3 May 2021 19:45:54 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: from mail-qt1-x831.google.com (mail-qt1-x831.google.com [IPv6:2607:f8b0:4864:20::831]) (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-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FYtkT0tXgz3QFj for ; Mon, 3 May 2021 19:45:53 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: by mail-qt1-x831.google.com with SMTP id z5so4631310qts.3 for ; Mon, 03 May 2021 12:45:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=4dsrx/fZ/ZiZz4LRVI6lj0RwwlsMopCLAxGE2ux/Z+M=; b=o5HiaEcP8oMnB6qvpQWCESE8cWE4bOf3BRJW7H4loSYflPv21i3BnXDsQFni9p21He nVE+7QfhcE9K5/UKjHSG2kWlvQB5J7tstL7YALqRNLO98WeUBP7XaIzOBYuIULxgaFm+ oWy6X1/SPT4zpngTA/qCr/fS0saiQWTjZ7Exj5d6XMFJKw/kRvruINCOukGteGBL2IPw Z7E0dnSbDkrrV5gk5B8JsZ8bxhjt6j58RDbvkdzZ5nXOCpH4lNRp/s8seGlNrIbylQjF jPQLwLouA26bfFi7Dl20VxIzZXm8XIWaYLZgERkwJKm1soufZGOHsxvzWD57behEM3Av IKZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=4dsrx/fZ/ZiZz4LRVI6lj0RwwlsMopCLAxGE2ux/Z+M=; b=uL9Imis1jtA9FyjNdPwYJmnlLuqUBwfs79AL145jNDBEmxmSHYE/goT9rmtkhCifls kL/9m4Ws7oJrAXqFF2Gn6OPIO2/xmSeo3ObUvWVrvFAr9iuJqdsV0goyDm+fU2PdTdUU n4MrZywbRPWf0uyEhOTfIAezlafHEiEYu+zGz4zbG9vm2yWpcGuPKyb9yAZybTup8ow8 nqaBUoB5SXZAIMtzsCoeTummqKqOsms0qaaLSAydnmybJAfGVSgsEnungYRMaU3O+dkU H2w4GctqGXVnNiHqFDiIFOcGA+tvSl74/Wo1zHS8icwj6+BRKYmeZtlofb+AtlXY/Quf 3nMg== X-Gm-Message-State: AOAM533uHtHiwdNPez+/AmjldQSJWSaH0YK60bgpBFknQy8D45FcrAWf 2fdiHqQ0LQTPBnuDQT5053Y= X-Google-Smtp-Source: ABdhPJzJuGv8AvJ+R6CHQmfPbQaQHxwaaRnkFzYFRgt6y0n9pj4QBajuZsKh0gk93SsDvnShE2SZlg== X-Received: by 2002:ac8:5f48:: with SMTP id y8mr18836709qta.69.1620071152228; Mon, 03 May 2021 12:45:52 -0700 (PDT) Received: from nuc ([142.126.164.150]) by smtp.gmail.com with ESMTPSA id e11sm8754864qkl.32.2021.05.03.12.45.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 May 2021 12:45:51 -0700 (PDT) Sender: Mark Johnston Date: Mon, 3 May 2021 15:45:53 -0400 From: Mark Johnston To: Michael Schmiedgen Cc: freebsd-net@freebsd.org Subject: Re: page fault while in kernel mode - after upgrade from 12.2 to 13.0 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 4FYtkT0tXgz3QFj X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=o5HiaEcP; dmarc=none; spf=pass (mx1.freebsd.org: domain of markjdb@gmail.com designates 2607:f8b0:4864:20::831 as permitted sender) smtp.mailfrom=markjdb@gmail.com X-Spamd-Result: default: False [-2.70 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FREEMAIL_TO(0.00)[gmx.net]; FORGED_SENDER(0.30)[markj@freebsd.org,markjdb@gmail.com]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[2607:f8b0:4864:20::831:from]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FROM_NEQ_ENVFROM(0.00)[markj@freebsd.org,markjdb@gmail.com]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-0.999]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-net@freebsd.org]; DMARC_NA(0.00)[freebsd.org]; SPAMHAUS_ZRD(0.00)[2607:f8b0:4864:20::831:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::831:from]; MID_RHS_NOT_FQDN(0.50)[]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-net] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 May 2021 19:45:54 -0000 On Mon, May 03, 2021 at 08:04:30PM +0200, Michael Schmiedgen wrote: > Hi List, > > if I start a Samba jail, after a few seconds the system crashes. Very reproducible. > > System has ~10 jails and 3 bhyve VMs. Dell server, Xeon E3-1240, 64GB RAM, 3 way mirror ZFS. > > It also occurs a few seconds after I start a phone call using the SIP VM of that machine, > very strange. > > I got some log messages suggesting raising somaxconn, so I did > > kern.ipc.somaxconn=4096 > > in sysctl.conf > > > Below some debug information, please let me know if I should provide further information. > > Should I open a bug or something? > > Thank you very much! > Michael > > > > Fatal trap 12: page fault while in kernel mode > cpuid = 0; apic id = 00 > fault virtual address = 0x0 > fault code = supervisor read data, page not present > instruction pointer = 0x20:0xffffffff80ca52c0 > stack pointer = 0x28:0xfffffe019d039650 > frame pointer = 0x28:0xfffffe019d039690 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, long 1, def32 0, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 649 (devd) > trap number = 12 > panic: page fault > cpuid = 0 > time = 1620061253 > KDB: stack backtrace: > #0 0xffffffff80c57345 at kdb_backtrace+0x65 > #1 0xffffffff80c09d21 at vpanic+0x181 > #2 0xffffffff80c09b93 at panic+0x43 > #3 0xffffffff8108b187 at trap_fatal+0x387 > #4 0xffffffff8108b1df at trap_pfault+0x4f > #5 0xffffffff8108a83d at trap+0x27d > #6 0xffffffff810617a8 at calltrap+0x8 > #7 0xffffffff80ca51c3 at sbappendaddr_locked+0x93 > #8 0xffffffff80cb437a at uipc_send+0x73a > #9 0xffffffff80ca9053 at sosend_generic+0x633 > #10 0xffffffff80ca94e0 at sosend+0x50 > #11 0xffffffff80caff2e at kern_sendit+0x20e > #12 0xffffffff80cb032b at sendit+0x1db > #13 0xffffffff80cb013d at sys_sendto+0x4d > #14 0xffffffff8108ba8c at amd64_syscall+0x10c > #15 0xffffffff810620ce at fast_syscall_common+0xf8 > Uptime: 2m2s > Dumping 2373 out of 65454 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91% > > __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:55 > 55 __asm("movq %%gs:%P1,%0" : "=r" (td) : "n" (offsetof(struct pcpu, > (kgdb) list *0xffffffff80ca52c0 > 0xffffffff80ca52c0 is in sbappendaddr_locked_internal (/usr/src/sys/kern/uipc_sockbuf.c:1169). > 1164 if (ctrl_last) > 1165 ctrl_last->m_next = m0; /* concatenate data to control */ > 1166 else > 1167 control = m0; > 1168 m->m_next = control; > 1169 for (n = m; n->m_next != NULL; n = n->m_next) > 1170 sballoc(sb, n); > 1171 sballoc(sb, n); > 1172 nlast = n; > 1173 SBLINKRECORD(sb, m); So we are crashing because "n" is somehow NULL? That seems difficult to explain. Can you show the local variables in this frame? Does the panic always have the same stack trace?