Date: Wed, 08 Jun 2022 19:17:50 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 231517] fts: causes error in valgrind Message-ID: <bug-231517-227-5YCtiYbSKM@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-231517-227@https.bugs.freebsd.org/bugzilla/> References: <bug-231517-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D231517 --- Comment #1 from Paul Floyd <pjfloyd@wanadoo.fr> --- With a debug build of libc I get =3D=3D1494=3D=3D Conditional jump or move depends on uninitialised value(s) =3D=3D1494=3D=3D at 0x48F29D7: fts_close (lib/libc/gen/fts.c:256) =3D=3D1494=3D=3D by 0x2019B6: main (ftstest.c:17) =3D=3D1494=3D=3D Uninitialised value was created by a heap allocation =3D=3D1494=3D=3D at 0x484CBC4: malloc (vg_replace_malloc.c:397) =3D=3D1494=3D=3D by 0x48F2606: fts_alloc (lib/libc/gen/fts.c:1022) =3D=3D1494=3D=3D by 0x48F2606: fts_open (lib/libc/gen/fts.c:195) =3D=3D1494=3D=3D by 0x20197E: main (ftstest.c:13) fts_open does this struct _fts_private *priv; if ((priv =3D calloc(1, sizeof(*priv))) =3D=3D NULL) return (NULL); sp =3D &priv->ftsp_fts; if ((sp->fts_cur =3D fts_alloc(sp, "", 0)) =3D=3D NULL) where the first member of _fts_private is FTS ftsp_fts; meaning p[riv and sp are equivalent addresses. And the error code is if (sp->fts_cur) { for (p =3D sp->fts_cur; p->fts_level >=3D FTS_ROOTLEVEL;) {= // ERROR It's what p points to that is not initialized: gdb) p p $5 =3D (FTSENT *) 0x54652d0 (gdb) p sizeof(*p) $6 =3D 152 (gdb) mo check_memory defined 0x54652d0 152 Address 0x54652D0 len 152 not defined: Uninitialised value at 0x54652D0 was created by a heap allocation =3D=3D1649=3D=3D at 0x484CBC4: malloc (vg_replace_malloc.c:397) =3D=3D1649=3D=3D by 0x48F2606: fts_alloc (lib/libc/gen/fts.c:1022) =3D=3D1649=3D=3D by 0x48F2606: fts_open (lib/libc/gen/fts.c:195) =3D=3D1649=3D=3D by 0x20197E: main (ftstest.c:13) Address 0x54652d0 is 0 bytes inside a block of size 377 alloc'd =3D=3D1649=3D=3D at 0x484CBC4: malloc (vg_replace_malloc.c:397) =3D=3D1649=3D=3D by 0x48F2606: fts_alloc (lib/libc/gen/fts.c:1022) =3D=3D1649=3D=3D by 0x48F2606: fts_open (lib/libc/gen/fts.c:195) =3D=3D1649=3D=3D by 0x20197E: main (ftstest.c:13) [using vgdb and the monitor command] As far as I'm concerned it's a bug in fts_open. --=20 You are receiving this mail because: You are the assignee for the bug.=
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