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core: memory exhaustion bug fix #45

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merged 1 commit into from
Nov 14, 2023
Merged

core: memory exhaustion bug fix #45

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19 changes: 18 additions & 1 deletion include/ctraces/ctr_variant_utils.h
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,10 @@

#include <mpack/mpack.h>

#define CFL_VARIANT_UTILS_MAXIMUM_FIXED_ARRAY_SIZE 100
#define CFL_VARIANT_UTILS_INITIAL_ARRAY_SIZE 100
#define CFL_VARIANT_UTILS_SERIALIZED_ARRAY_SIZE_LIMIT 100000

/* These are the only functions meant for general use,
* the reason why the kvlist packing and unpacking
* functions are exposed is the internal and external
Expand Down Expand Up @@ -226,12 +230,25 @@ static inline int unpack_cfl_array(mpack_reader_t *reader,

entry_count = mpack_tag_array_count(&tag);

internal_array = cfl_array_create(entry_count);
if (entry_count >= CFL_VARIANT_UTILS_SERIALIZED_ARRAY_SIZE_LIMIT) {
return -2;
}

if (entry_count >= CFL_VARIANT_UTILS_MAXIMUM_FIXED_ARRAY_SIZE) {
internal_array = cfl_array_create(CFL_VARIANT_UTILS_INITIAL_ARRAY_SIZE);
}
else {
internal_array = cfl_array_create(entry_count);
}

if (internal_array == NULL) {
return -3;
}

if (entry_count >= CFL_VARIANT_UTILS_MAXIMUM_FIXED_ARRAY_SIZE) {
cfl_array_resizable(internal_array, CFL_TRUE);
}

for (index = 0 ; index < entry_count ; index++) {
result = unpack_cfl_variant(reader, &entry_value);

Expand Down
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