From nobody Thu Nov 2 16:48:15 2023 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 4SLqZ80DP4z4yrn6 for ; Thu, 2 Nov 2023 16:48:16 +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 4SLqZ74tPRz3CNH for ; Thu, 2 Nov 2023 16:48:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1698943695; 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=zkSK/YJ5H8ekevFKaD5U8Y+iKs+ilN7ls/qyAJ+vYFw=; b=EIDQlTHu/n503urLZth/ullp6pk2gN6tA8DEYnVoYgWueKlsrsK8czwlbjc8LvD3gvEQ6u DIg4oUiAdbrAvtpvx7w7o+lXbUpBs1elSi6jd17uSOT0FHQOAIHUjpsOiQyAchKOsK2HkH rFCxNjzGoo4nXEVcHg2/JjxhHqL6oxUxFHNfrq8pvIDsTLQt5M6gtZOQR0UZl3cS+zFru7 gggJDHcEA28JowIs1QODAvCkUYznUVPs6hoDDLhNbEfZhR00PISbxPoiN7j3FWw31pZUob PKleaGldi6vijnggYNr3mO3V8sLdYQEMEi05nA8Tu/zMgKSq3uSJ6UZYFxXt7Q== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1698943695; a=rsa-sha256; cv=none; b=JQVO4sZk4cpHvvAlf+HX0xLOwVw+SCgXFKsbH33+WHWokalBrs8Z+OWuiQEKF9NV/gLgAZ EqqRenaM57Z1EYRJe72NyVC5Y/dRX45xewRIa/xODuUKoMl/U6Z6jTShnIjwLM4pjyr8SF GCbYvR7PQvaR1DoFXqMEYNHCO/0d+higPKmfzaRcAaGUmNGxKtFH67ivyCQ72V8kbWCqVr IXjGTzdYCZG7qTi1Fcc7A/Kr5cOQmKWRDfDcmlWI24yYSim3KnBxXLVbbjj0GJqtqbGOZc D19Pp7xyS2dI6CUApHJA1ndYPVjL2SmHutSRe9HUHcjUuIwmpATnj0mjUgTtWQ== 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 4SLqZ73wbhzcgT for ; Thu, 2 Nov 2023 16:48:15 +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 3A2GmFJc046389 for ; Thu, 2 Nov 2023 16:48:15 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 3A2GmFn0046388 for bugs@FreeBSD.org; Thu, 2 Nov 2023 16:48:15 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 274875] A possible null-pointer dereference caused by a data race in sys/geom/gate/g_gate.c Date: Thu, 02 Nov 2023 16:48:15 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 14.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: islituo@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: 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 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D274875 Bug ID: 274875 Summary: A possible null-pointer dereference caused by a data race in sys/geom/gate/g_gate.c Product: Base System Version: 14.0-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: islituo@gmail.com In the function g_gate_dumpconf(), sc->sc_readcons is first checked to be n= ot NULL: if (sc->sc_readcons !=3D NULL) and then dereferenced: sbuf_printf(sb, "%s%s\n", indent, sc->sc_readcons->provider->name); However, sc->sc_readcons can be set to NULL by other functions such as g_gate_modify() right after it is checked: sc->sc_readcons =3D NULL; and thus can cause a null-pointer dereference. --=20 You are receiving this mail because: You are the assignee for the bug.=