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Add qemu_get_counted_string to read a string prefixed by a count byte

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and use it in loadvm_state and ram_load.

Where ever it's used, check the return and error if it failed.

Minor: ram_load was using a 257 byte array for its string, the
       maximum length is 255 bytes + 0 terminator, so fix to 256

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2015-05-21 13:24:11 +01:00 • committed by Juan Quintela
parent 5cd8cadae8
commit b3af1bc9d2
3 changed files with 26 additions and 5 deletions
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11
migration/savevm.c
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@ -973,8 +973,7 @@ int qemu_loadvm_state(QEMUFile *f)
while ((section_type = qemu_get_byte(f)) != QEMU_VM_EOF) {
uint32_t instance_id, version_id, section_id;
SaveStateEntry *se;
char idstr[257];
int len;
char idstr[256];
trace_qemu_loadvm_state_section(section_type);
switch (section_type) {
@ -982,9 +981,11 @@ int qemu_loadvm_state(QEMUFile *f)
case QEMU_VM_SECTION_FULL:
/* Read section start */
section_id = qemu_get_be32(f);
len = qemu_get_byte(f);
qemu_get_buffer(f, (uint8_t *)idstr, len);
idstr[len] = 0;
if (!qemu_get_counted_string(f, idstr)) {
error_report("Unable to read ID string for section %u",
section_id);
return -EINVAL;
}
instance_id = qemu_get_be32(f);
version_id = qemu_get_be32(f);