From nobody Mon Mar 11 13:57:27 2024 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 4Ttdd32NFMz5D2dF for ; Mon, 11 Mar 2024 13:57:27 +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 4Ttdd306Wvz4Nkp for ; Mon, 11 Mar 2024 13:57:27 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1710165447; a=rsa-sha256; cv=none; b=bPyoq43lDyYZh7ndr/rcAeMUIq6kqhNrVL8N0r7s1BQhuwyy62n+8BE8s+c5pTyDJ+6fjL fZUfXylKeZf3sdEhtclVJuWtAkv+2oWQvd3Q5jdI5b6F42kPBbXBEPBnKOdI3FdOI528Nw 8z5l/sO9BepGFi6YGmQXGAVdezTnSNsmQeoYjj9+0pJ1XMxmNc80UQkCx2crk8TzOSIgaC F0yIqheiUrwDN++PjDfu/BtKJA0BWHVfAAxRZ5dXCto9kAeyGRLrCmoVdSTtGJtBg+sUmW aqDlUzG9965JcUhbQKL7tXui6Xx7LWA32xbnMFg9wDqYyS0xiHTstV3WA6qCtw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1710165447; 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=aDjmf7G94SFr8ZrlBqEO66AbnpwINkeb0ofTsMp82V4=; b=fWhmOB++2+q46REoIIFLKzgrY5W4BE6rbkRHIfu50wi56Vcy2H+se1jyO97WHWpVwzQEfs 7uVOMyCc7dxxEAYFkIFHAeYbeUP6MWusZon90orXCldYdbEa6lx78cpLvA7OsquZuT01Tl X77YA/4HGlVgSfKZx6S4KBDFP6q3iFq1hhcf7cAVXNGP8iGFqR8YPJIPXeja2kAcVHdE9c S6NCGPBYis1iaTfR0odRFBQGTSu20Mnc3fA9Io5DZmw8IDImhnc9ZmLC8JKlgXfDjn54yw Q5KV/kPalkF0LI4yab7Y1w5kbjtd00JrMd/n0RPzU+CaIvXqBWWn+A2WvR4zyw== 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 4Ttdd26r9vzXy1 for ; Mon, 11 Mar 2024 13:57:26 +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 42BDvQB9014862 for ; Mon, 11 Mar 2024 13:57:26 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 42BDvQmm014861 for bugs@FreeBSD.org; Mon, 11 Mar 2024 13:57:26 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 277629] ldd (ld-elf.so.1) uses p_vaddr without checking Date: Mon, 11 Mar 2024 13:57:27 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: rtm@lcs.mit.edu 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 attachments.created 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=3D277629 Bug ID: 277629 Summary: ldd (ld-elf.so.1) uses p_vaddr without checking Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: rtm@lcs.mit.edu Created attachment 249091 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D249091&action= =3Dedit corrupt elf file that causes ldd to crash due to its use of p_vaddr When ldd calls dlopen(..., RTLD_TRACE), ld-elf.so.1's map_object() sets obj->dynamic from a p_vaddr without checking: case PT_DYNAMIC: phdyn =3D phdr; ...; obj->dynamic =3D (const Elf_Dyn *)(obj->relocbase + phdyn->p_vaddr); and digest_dynamic1() dereferences it: dynp =3D obj->dynamic; ...; for (; dynp->d_tag !=3D DT_NULL; dynp++) { I've attached a corrupt elf file with the relevant p_vaddr set to 0x7ffffffff9699fff. This example happens to cause ldd to crash only on a riscv machine (not amd64). # uname -a FreeBSD 15.0-CURRENT FreeBSD 15.0-CURRENT #270 main-n250982-48b12cb79520-dirty: Sat Mar 9 08:36:40 EST 2024=20=20=20=20 rtm@zika:/usr/obj/usr/rtm/symbsd/src/riscv.riscv64/sys/RTM riscv # objdump -x ./ldd7a.exe | grep 0x7fff DYNAMIC off 0x0000000000000000 vaddr 0x7ffffffff9699fff paddr 0x0000000000000000 align 2**64 # ldd ./ldd7a.exe=20 ./ldd7a.exe: pid 136 (ldd), jid 0, uid 0: exited on signal 11 (core dumped) --=20 You are receiving this mail because: You are the assignee for the bug.=