Date: Sat, 5 Nov 2011 10:24:04 -0400 From: Lucas Holt <luke@foolishgames.com> To: rank1seeker@gmail.com Cc: hackers@freebsd.org Subject: Re: BUG: 'glabel label' name's lenght, is truncated without err/warn Message-ID: <1859A0FF-C3BF-4EC3-9CC6-FA97B9AF5C99@foolishgames.com> In-Reply-To: <20111105.110247.867.1@DOMY-PC> References: <20111105.110247.867.1@DOMY-PC>
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On Nov 5, 2011, at 7:02 AM, rank1seeker@gmail.com wrote: > 8.2R p4 both i386/amd64 >=20 >=20 > Supplied name of 16 chars > -- > # glabel label -v swap_679592d048a ada0s3b > Metadata value stored on ada0s3b. > Done. > -- >=20 > Truncated to 15 chars > -- > # ll /dev/label > total 0 > crw-r----- 1 root operator - 0, 133 Nov 5 11:41:54 2011 = swap_679592d048 > -- >=20 The maximum size for the field is 16 so that explains the behavior = you're seeing. It's strlcpy'd in. Something like the following patch = would work: --- src/sbin/geom/class/label/geom_label.c 2008/11/21 21:05:31 = 1.3 +++ src/sbin/geom/class/label/geom_label.c 2011/11/05 14:15:23 = 1.4 @@ -118,6 +118,12 @@ label_label(struct gctl_req *req) return; } =20 + label =3D gctl_get_ascii(req, "arg0"); + if (strlen(label) > 15) { + gctl_error(req, "Label cannot exceed 15 characters"); + return; + } + /* * Clear last sector first to spoil all components if device = exists. */ @@ -131,7 +137,6 @@ label_label(struct gctl_req *req) =20 strlcpy(md.md_magic, G_LABEL_MAGIC, sizeof(md.md_magic)); md.md_version =3D G_LABEL_VERSION; - label =3D gctl_get_ascii(req, "arg0"); strlcpy(md.md_label, label, sizeof(md.md_label)); md.md_provsize =3D g_get_mediasize(name); if (md.md_provsize =3D=3D 0) { Lucas Holt Luke@FoolishGames.com ________________________________________________________ MidnightBSD.org (Free OS) JustJournal.com (Free blogging)
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