From owner-freebsd-bugs@freebsd.org Sat May 8 07:10:55 2021 Return-Path: Delivered-To: freebsd-bugs@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 5922A62B330 for ; Sat, 8 May 2021 07:10:55 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 4Fcdl31v9Fz4Zm5 for ; Sat, 8 May 2021 07:10:55 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 3F5CE62B38B; Sat, 8 May 2021 07:10:55 +0000 (UTC) Delivered-To: bugs@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 3F26762B2BA for ; Sat, 8 May 2021 07:10:55 +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 4Fcdl31HcXz4b7J for ; Sat, 8 May 2021 07:10:55 +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 154A31A6D4 for ; Sat, 8 May 2021 07:10:55 +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 1487Atvl085894 for ; Sat, 8 May 2021 07:10:55 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 1487AtmX085893 for bugs@FreeBSD.org; Sat, 8 May 2021 07:10:55 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 255698] dlerror() returns non-NULL after a successful call to dlopen()/dlsym() Date: Sat, 08 May 2021 07:10:55 +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 Only Me X-Bugzilla-Who: astralblue@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 MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 08 May 2021 07:10:55 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D255698 Bug ID: 255698 Summary: dlerror() returns non-NULL after a successful call to dlopen()/dlsym() Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: astralblue@gmail.com dlerror() used to return NULL after a successful call to other dl family of functions, such as dlopen() and dlsym(). Starting recently, dlerror() star= ted returning non-NULL message after such successful calls. The message is initially an empty string, or an error message most recently seen=E2=80=94e= ven if the most recent dlXXXX() call was successful. Test program: #include #include #define PRINT_DLERROR() do { \ char const *err =3D dlerror(); \ printf("dlerror()=3D%p", err); \ if (err) printf(" (%s)", err); \ printf("\n"); \ } while (0) void test_dlopen(char const *path) { void *handle =3D dlopen(path, RTLD_NOW); printf("dlopen(%s, RTLD_NOW)=3D%p\n", path, handle); PRINT_DLERROR(); PRINT_DLERROR(); if (handle) dlclose(handle); } int main() { PRINT_DLERROR(); PRINT_DLERROR(); test_dlopen("/foobar.so"); test_dlopen("/usr/lib/libm.so"); return 0; } Expected result (taken on a 12.2-RELEASE-p2 jail, note dlerror() returns NU= LL upon a successful dlopen()): dlerror()=3D0x0 dlerror()=3D0x0 dlopen(/foobar.so, RTLD_NOW)=3D0x0 dlerror()=3D0x8002296c0 (Cannot open "/foobar.so") dlerror()=3D0x0 dlopen(/usr/lib/libm.so, RTLD_NOW)=3D0x80022e800 dlerror()=3D0x0 dlerror()=3D0x0 Actual result (taken on a -CURRENT system, built from main branch commit 34abb05be77a32a2b2673fb4b85eaa53a3d1446e, note dlerror() returns non-NULL on the first dlerror() call, even after a successful dlopen() and also before = the first dlopen(), also note the dlerror() message after a successful dlopen()= is from the previous failure): 34abb05be77a32a2b2673fb4b85eaa53a3d1446e --=20 You are receiving this mail because: You are the assignee for the bug.=