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Validate the filter chain before checking filter-specific 

memory usage.
This commit is contained in:
Lasse Collin 2008-12-01 22:59:28 +02:00
parent c596fda40b
commit ccd57afa09
1 changed files with 10 additions and 4 deletions
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14
src/liblzma/common/filter_common.c
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@ -227,8 +227,11 @@ lzma_memusage_coder(lzma_filter_find coder_find,
const lzma_filter *filters) const lzma_filter *filters)
{ {
// The chain has to have at least one filter. // The chain has to have at least one filter.
if (filters[0].id == LZMA_VLI_UNKNOWN) {
return UINT64_MAX; size_t tmp;
if (validate_chain(filters, &tmp) != LZMA_OK)
return UINT64_MAX;
}
uint64_t total = 0; uint64_t total = 0;
size_t i = 0; size_t i = 0;
@ -241,8 +244,11 @@ lzma_memusage_coder(lzma_filter_find coder_find,
if (fc->memusage == NULL) { if (fc->memusage == NULL) {
// This filter doesn't have a function to calculate // This filter doesn't have a function to calculate
// the memory usage. Such filters need only little // the memory usage and validate the options. Such
// memory, so we use 1 KiB as a good estimate. // filters need only little memory, so we use 1 KiB
// as a good estimate. They also accept all possible
// options, so there's no need to worry about lack
// of validation.
total += 1024; total += 1024;
} else { } else {
// Call the filter-specific memory usage calculation // Call the filter-specific memory usage calculation