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diff --git a/sys/geom/part/g_part_gpt.c b/sys/geom/part/g_part_gpt.c
--- a/sys/geom/part/g_part_gpt.c
+++ b/sys/geom/part/g_part_gpt.c
@@ -85,6 +85,7 @@
GPT_STATE_MISSING, /* No signature found. */
GPT_STATE_CORRUPT, /* Checksum mismatch. */
GPT_STATE_INVALID, /* Nonconformant/invalid. */
+ GPT_STATE_UNSUPPORTED, /* Not supported. */
GPT_STATE_OK /* Perfectly fine. */
};
@@ -148,6 +149,8 @@
{ 0, 0 }
};
+#define MAXENTSIZE 1024
+
static struct g_part_scheme g_part_gpt_scheme = {
"GPT",
g_part_gpt_methods,
@@ -548,6 +551,11 @@
if (hdr == NULL)
return (NULL);
+ if (hdr->hdr_entries > g_part_gpt_scheme.gps_maxent ||
+ hdr->hdr_entsz > MAXENTSIZE) {
+ table->state[elt] = GPT_STATE_UNSUPPORTED;
+ return (NULL);
+ }
pp = cp->provider;
table->lba[elt] = hdr->hdr_lba_table;
@@ -961,10 +969,25 @@
/* Fail if we haven't got any good tables at all. */
if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK &&
table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
- printf("GEOM: %s: corrupt or invalid GPT detected.\n",
- pp->name);
- printf("GEOM: %s: GPT rejected -- may not be recoverable.\n",
- pp->name);
+ if (table->state[GPT_ELT_PRITBL] == GPT_STATE_UNSUPPORTED &&
+ table->state[GPT_ELT_SECTBL] == GPT_STATE_UNSUPPORTED &&
+ gpt_matched_hdrs(prihdr, sechdr)) {
+ printf("GEOM: %s: unsupported GPT detected.\n",
+ pp->name);
+ printf(
+ "GEOM: %s: number of GPT entries: %u, entry size: %uB.\n",
+ pp->name, prihdr->hdr_entries, prihdr->hdr_entsz);
+ printf(
+ "GEOM: %s: maximum supported number of GPT entries: %u, entry size: %uB.\n",
+ pp->name, g_part_gpt_scheme.gps_maxent, MAXENTSIZE);
+ printf("GEOM: %s: GPT rejected.\n", pp->name);
+ } else {
+ printf("GEOM: %s: corrupt or invalid GPT detected.\n",
+ pp->name);
+ printf(
+ "GEOM: %s: GPT rejected -- may not be recoverable.\n",
+ pp->name);
+ }
if (prihdr != NULL)
g_free(prihdr);
if (pritbl != NULL)

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