From nobody Tue Oct 26 15:30:16 2021 X-Original-To: bugs@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 C1287182D596 for ; Tue, 26 Oct 2021 15:30:16 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (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 "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4HdwkJ4lvVz4dyv for ; Tue, 26 Oct 2021 15:30:16 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 77D5B1F273 for ; Tue, 26 Oct 2021 15:30:16 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 19QFUGeo013321 for ; Tue, 26 Oct 2021 15:30:16 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 19QFUGpF013320 for bugs@FreeBSD.org; Tue, 26 Oct 2021 15:30:16 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: bugs@FreeBSD.org Subject: [Bug 259458] iflib_rxeof NULL pointer crash with vmxnet3 driver Date: Tue, 26 Oct 2021 15:30:16 +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: 12.2-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: avg@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: 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 List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@freebsd.org MIME-Version: 1.0 X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D259458 --- Comment #7 from Andriy Gapon --- In the end, it looks like somehow index 327 was not re-filled earlier. Or it was somehow consumed twice in a row... (kgdb) p/x *$2.ifl_rx_bitmap@8 $73 =3D {0xffffffffffffffff, 0xffffffffffffffff, 0x3fff, 0x0, 0x0, 0xffffffffffffff00, 0xffffffffffffffff, 0xffffffffffffffff} (kgdb) p $2.ifl_sds.ifsd_m[327] $74 =3D (struct mbuf *) 0x0 (kgdb) p $2.ifl_sds.ifsd_m[328] $75 =3D (struct mbuf *) 0xfffff80123211b00 (kgdb) p $2.ifl_sds.ifsd_cl[327] $76 =3D (caddr_t) 0x0 (kgdb) p $2.ifl_sds.ifsd_cl[328] $77 =3D (caddr_t) 0xfffff8012322b800 "\377\377\377\377\377\377" ifl_rx_bitmap has bits [0, 141] set, bits [142, 327] clear and bits [328, 5= 11] set again. Given ifl_fragidx =3D 142 the latest refill went up to 141 which was what we actually see. So, it was not the latest refill. --=20 You are receiving this mail because: You are the assignee for the bug.=