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dmg: warn when opening dmg images containing blocks of unknown type

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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220929093035.4231-5-cfontana@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Kevin Wolf 2022-09-29 11:30:34 +02:00 committed by Paolo Bonzini
parent c551fb0b53
commit 971974f0a9
1 changed files with 19 additions and 0 deletions
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19
block/dmg.c
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@ -254,6 +254,25 @@ static int dmg_read_mish_block(BDRVDMGState *s, DmgHeaderState *ds,
for (i = s->n_chunks; i < s->n_chunks + chunk_count; i++) {
s->types[i] = buff_read_uint32(buffer, offset);
if (!dmg_is_known_block_type(s->types[i])) {
switch (s->types[i]) {
case UDBZ:
warn_report_once("dmg-bzip2 module is missing, accessing bzip2 "
"compressed blocks will result in I/O errors");
break;
case ULFO:
warn_report_once("dmg-lzfse module is missing, accessing lzfse "
"compressed blocks will result in I/O errors");
break;
case UDCM:
case UDLE:
/* Comments and last entry can be ignored without problems */
break;
default:
warn_report_once("Image contains chunks of unknown type %x, "
"accessing them will result in I/O errors",
s->types[i]);
break;
}
chunk_count--;
i--;
offset += 40;