d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Escape characters unsafe for XML output in GEOM class, instance and

Browse Source 
provider names.

- Characters in range 0x01-0x1f except '\t', '\n', and '\r' are replaced
  with '?'. Those characters are disallowed in XML.
- '&', '<', '>', '\'', '"' and characters in range 0x7f-0xff are
  replaced with XML numeric character reference.

If the kern.geom.confxml sysctl provides invalid XML, libgeom
geom_xml2tree() fails and utilities using it do not work. Unsafe
characters are common in msdosfs and cd9660 labels.

PR:		kern/104389
Submitted by:	Doug Steinwand (original version)
Reviewed by:	pjd
Discussed on:	freebsd-geom
MFC after:	3 weeks
This commit is contained in:
Jaakko Heinonen 2010-03-20 16:16:13 +00:00
parent 50a8df3ce9
commit a41aa4a789
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=205385
1 changed files with 25 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
sys/geom/geom_dump.c
View File

@ -153,6 +153,28 @@ g_conftxt(void *p, int flag)
}
static void
g_conf_print_escaped(struct sbuf *sb, const char *fmt, const char *str)
{
struct sbuf *s;
const u_char *c;
s = sbuf_new_auto();
for (c = str; *c != '\0'; c++) {
if (*c == '&' || *c == '<' || *c == '>' ||
*c == '\'' || *c == '"' || *c > 0x7e)
sbuf_printf(s, "&#x%X;", *c);
else if (*c == '\t' || *c == '\n' || *c == '\r' || *c > 0x1f)
sbuf_putc(s, *c);
else
sbuf_putc(s, '?');
}
sbuf_finish(s);
sbuf_printf(sb, fmt, sbuf_data(s));
sbuf_delete(s);
}
static void
g_conf_consumer(struct sbuf *sb, struct g_consumer *cp)
{
@ -181,7 +203,7 @@ g_conf_provider(struct sbuf *sb, struct g_provider *pp)
sbuf_printf(sb, "\t <geom ref=\"%p\"/>\n", pp->geom);
sbuf_printf(sb, "\t <mode>r%dw%de%d</mode>\n",
pp->acr, pp->acw, pp->ace);
sbuf_printf(sb, "\t <name>%s</name>\n", pp->name);
g_conf_print_escaped(sb, "\t <name>%s</name>\n", pp->name);
sbuf_printf(sb, "\t <mediasize>%jd</mediasize>\n",
(intmax_t)pp->mediasize);
sbuf_printf(sb, "\t <sectorsize>%u</sectorsize>\n", pp->sectorsize);
@ -208,7 +230,7 @@ g_conf_geom(struct sbuf *sb, struct g_geom *gp, struct g_provider *pp, struct g_
sbuf_printf(sb, " <geom id=\"%p\">\n", gp);
sbuf_printf(sb, " <class ref=\"%p\"/>\n", gp->class);
sbuf_printf(sb, " <name>%s</name>\n", gp->name);
g_conf_print_escaped(sb, " <name>%s</name>\n", gp->name);
sbuf_printf(sb, " <rank>%d</rank>\n", gp->rank);
if (gp->flags & G_GEOM_WITHER)
sbuf_printf(sb, " <wither/>\n");
@ -237,7 +259,7 @@ g_conf_class(struct sbuf *sb, struct g_class *mp, struct g_geom *gp, struct g_pr
struct g_geom *gp2;
sbuf_printf(sb, " <class id=\"%p\">\n", mp);
sbuf_printf(sb, " <name>%s</name>\n", mp->name);
g_conf_print_escaped(sb, " <name>%s</name>\n", mp->name);
LIST_FOREACH(gp2, &mp->geom, geom) {
if (gp != NULL && gp != gp2)
continue;