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increase minimum class region size to avoid OOB access under minimum class region size config #331

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increase minimum class region size to avoid OOB access under minimum class region size config #331

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4 changes: 3 additions & 1 deletion h_malloc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,7 @@ static_assert(FREE_SLABS_QUARANTINE_RANDOM_LENGTH >= 0 && FREE_SLABS_QUARANTINE_

static_assert(GUARD_SLABS_INTERVAL >= 1, "invalid guard slabs interval (minimum 1)");
static_assert(GUARD_SIZE_DIVISOR >= 1, "invalid guard size divisor (minimum 1)");
static_assert(CONFIG_CLASS_REGION_SIZE >= 1048576, "invalid class region size (minimum 1048576)");
static_assert(CONFIG_CLASS_REGION_SIZE >= 25165824, "invalid class region size (minimum 25165824)");
static_assert(CONFIG_CLASS_REGION_SIZE <= 1099511627776, "invalid class region size (maximum 1099511627776)");
static_assert(REGION_QUARANTINE_SKIP_THRESHOLD >= 0,
"invalid region quarantine skip threshold (minimum 0)");
Expand Down Expand Up @@ -960,6 +960,8 @@ struct quarantine_info {

#define INITIAL_REGION_TABLE_SIZE 128
#define MAX_REGION_TABLE_SIZE (CLASS_REGION_SIZE / PAGE_SIZE / sizeof(struct region_metadata))
static_assert(MAX_REGION_TABLE_SIZE >= INITIAL_REGION_TABLE_SIZE,
"max region table smaller than initial region table");

struct region_allocator {
struct mutex lock;
Expand Down