f6d7884ea7
Update to v4.0.0 OBS-URL: https://build.opensuse.org/request/show/699951 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=464
93 lines
4.0 KiB
Diff
93 lines
4.0 KiB
Diff
From: Bruce Rogers <brogers@suse.com>
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Date: Fri, 5 Apr 2019 21:10:30 -0600
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Subject: hw/smbios: handle both file formats regardless of machine type
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It's easy enough to handle either per-spec or legacy smbios structures
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in the smbios file input without regard to the machine type used, by
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simply applying the basic smbios formatting rules. then depending on
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what is detected. terminal numm bytes are added or removed for machine
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type specific processing.
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[BR: BSC#994082 BSC#1084316 BOO#1131894]
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Signed-off-by: Bruce Rogers <brogers@suse.com>
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---
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hw/smbios/smbios.c | 43 +++++++++++++++++++++++++++++++++++++++----
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1 file changed, 39 insertions(+), 4 deletions(-)
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diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c
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index 47be9071fa..d4b95ebc84 100644
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--- a/hw/smbios/smbios.c
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+++ b/hw/smbios/smbios.c
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@@ -960,6 +960,7 @@ void smbios_entry_add(QemuOpts *opts, Error **errp)
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struct smbios_structure_header *header;
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int size;
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struct smbios_table *table; /* legacy mode only */
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+ uint8_t *dbl_nulls, *orig_end;
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qemu_opts_validate(opts, qemu_smbios_file_opts, &err);
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if (err) {
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@@ -974,11 +975,21 @@ void smbios_entry_add(QemuOpts *opts, Error **errp)
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}
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/*
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- * NOTE: standard double '\0' terminator expected, per smbios spec.
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- * (except in legacy mode, where the second '\0' is implicit and
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- * will be inserted by the BIOS).
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+ * NOTE: standard double '\0' terminator expected, per smbios spec,
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+ * unless the data is formatted for legacy mode, which is used by
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+ * pc-i440fx-2.0 and earlier machine types. Legacy mode structures
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+ * without strings have no '\0' terminators, and those with strings
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+ * also don't have an additional '\0' terminator at the end of the
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+ * final string '\0' terminator. The BIOS will add the '\0' terminators
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+ * to comply with the smbios spec.
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+ * For greater compatibility, regardless of the machine type used,
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+ * either format is accepted.
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*/
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- smbios_tables = g_realloc(smbios_tables, smbios_tables_len + size);
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+ smbios_tables = g_realloc(smbios_tables, smbios_tables_len + size + 2);
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+ orig_end = smbios_tables + smbios_tables_len + size;
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+ /* add extra null bytes to end in case of legacy file data */
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+ *orig_end = '\0';
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+ *(orig_end + 1) = '\0';
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header = (struct smbios_structure_header *)(smbios_tables +
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smbios_tables_len);
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@@ -993,6 +1004,19 @@ void smbios_entry_add(QemuOpts *opts, Error **errp)
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header->type);
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return;
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}
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+ for (dbl_nulls = smbios_tables + smbios_tables_len + header->length;
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+ dbl_nulls + 2 <= orig_end; dbl_nulls++) {
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+ if (*dbl_nulls == '\0' && *(dbl_nulls + 1) == '\0') {
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+ break;
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+ }
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+ }
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+ if (dbl_nulls + 2 < orig_end) {
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+ error_setg(errp, "SMBIOS file data malformed");
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+ return;
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+ }
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+ /* increase size by how many extra nulls were actually needed */
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+ size += dbl_nulls + 2 - orig_end;
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+ smbios_tables = g_realloc(smbios_tables, smbios_tables_len + size);
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set_bit(header->type, have_binfile_bitmap);
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if (header->type == 4) {
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@@ -1013,6 +1037,17 @@ void smbios_entry_add(QemuOpts *opts, Error **errp)
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* delete the one we don't need from smbios_set_defaults(),
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* once we know which machine version has been requested.
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*/
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+ if (dbl_nulls + 2 == orig_end) {
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+ /* chop off nulls to get legacy format */
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+ if (header->length + 2 == size) {
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+ size -= 2;
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+ } else {
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+ size -= 1;
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+ }
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+ } else {
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+ /* undo conversion from legacy format to per-spec format */
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+ size -= dbl_nulls + 2 - orig_end;
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+ }
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if (!smbios_entries) {
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smbios_entries_len = sizeof(uint16_t);
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smbios_entries = g_malloc0(smbios_entries_len);
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