From owner-freebsd-net@freebsd.org Tue Jun 25 13:25:04 2019 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8023A15CC935 for ; Tue, 25 Jun 2019 13:25:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 1B18C8B1B5 for ; Tue, 25 Jun 2019 13:25:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id CFCA215CC934; Tue, 25 Jun 2019 13:25:03 +0000 (UTC) Delivered-To: net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id AA8F315CC933 for ; Tue, 25 Jun 2019 13:25:03 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 44EB08B1B1 for ; Tue, 25 Jun 2019 13:25:03 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 937C8D2F2 for ; Tue, 25 Jun 2019 13:25:02 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id x5PDP2ux028667 for ; Tue, 25 Jun 2019 13:25:02 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x5PDP23M028666 for net@FreeBSD.org; Tue, 25 Jun 2019 13:25:02 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 238789] panic: mutex so_rcv not owned at /usr/src/sys/kern/uipc_socket.c:2359 Date: Tue, 25 Jun 2019 13:25:02 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 12.0-STABLE X-Bugzilla-Keywords: needs-qa, panic X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: greg@codeconcepts.com X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@FreeBSD.org X-Bugzilla-Flags: mfc-stable11? mfc-stable12? X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Jun 2019 13:25:04 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D238789 --- Comment #5 from Greg Becker --- Sure Kubilay, here's my backtrace. It's from a kernel module I am working = on that I have not yet published. I hit this easily with GENERIC, but never h= it it when running with the patch I supplied: panic: mutex so_rcv not owned at /usr/src/sys/kern/uipc_socket.c:2359 cpuid =3D 11 time =3D 1561372118 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2c/frame 0xfffffe012015e= 5b0 kdb_backtrace() at kdb_backtrace+0x53/frame 0xfffffe012015e660 vpanic() at vpanic+0x265/frame 0xfffffe012015e720 doadump() at doadump/frame 0xfffffe012015e780 __mtx_assert() at __mtx_assert+0x145/frame 0xfffffe012015e800 soreceive_stream() at soreceive_stream+0x963/frame 0xfffffe012015e8b0 soreceive() at soreceive+0x102/frame 0xfffffe012015e910 krpc_recv_tcp() at krpc_recv_tcp+0x55/frame 0xfffffe012015e9a0 svc_rcv_receive() at svc_rcv_receive+0x1c/frame 0xfffffe012015e9e0 tpool_run() at tpool_run+0x92/frame 0xfffffe012015ea30 fork_exit() at fork_exit+0x13b/frame 0xfffffe012015eab0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe012015eab0 --- trap 0, rip =3D 0, rsp =3D 0, rbp =3D 0 --- KDB: enter: panic [ thread pid 0 tid 101260 ] Stopped at breakpoint+0x5: popq %rbp I think what is happening is that I am post-processing a rcv soupcall, but = the non-blocking call to sblock() in soreceive() loses due to a race with an asynchronously running call to soshutdown(SHUT_RD) from my module unload co= de.=20 But I have not yet verified that... I'm using GENERIC with the following options: options CONSPEED=3D115200 options BREAK_TO_DEBUGGER options DDB options SOCKBUF_DEBUG options INVARIANTS options INVARIANT_SUPPORT FreeBSD sm1.cc.codeconcepts.com 12.0-STABLE FreeBSD 12.0-STABLE #31 r349288= M: Tue Jun 25 07:19:16 CDT 2019=20=20=20=20 greg@sm1.cc.codeconcepts.com:/usr/obj/usr/src/amd64.amd64/sys/SM1 amd64 --=20 You are receiving this mail because: You are the assignee for the bug.=