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mdbx: дополнительные проверки сигнатур курсоров при итерации связанных списков (backport).

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Леонид Юрьев (Leonid Yuriev) 2025-03-02 11:45:28 +03:00
parent 9277daa185
commit d313008d82
1 changed files with 10 additions and 2 deletions
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12
src/api-cursor.c
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@ -114,8 +114,12 @@ int mdbx_cursor_unbind(MDBX_cursor *mc) {
cASSERT(mc, dbi < mc->txn->n_dbi); cASSERT(mc, dbi < mc->txn->n_dbi);
if (dbi < mc->txn->n_dbi) { if (dbi < mc->txn->n_dbi) {
MDBX_cursor **prev = &mc->txn->cursors[dbi]; MDBX_cursor **prev = &mc->txn->cursors[dbi];
while (*prev && *prev != mc) while (*prev) {
ENSURE(mc->txn->env, (*prev)->signature == cur_signature_live || (*prev)->signature == cur_signature_wait4eot);
if (*prev == mc)
break;
prev = &(*prev)->next; prev = &(*prev)->next;
}
cASSERT(mc, *prev == mc); cASSERT(mc, *prev == mc);
*prev = mc->next; *prev = mc->next;
} }
@ -158,8 +162,12 @@ void mdbx_cursor_close(MDBX_cursor *mc) {
tASSERT(txn, dbi < txn->n_dbi); tASSERT(txn, dbi < txn->n_dbi);
if (dbi < txn->n_dbi) { if (dbi < txn->n_dbi) {
MDBX_cursor **prev = &txn->cursors[dbi]; MDBX_cursor **prev = &txn->cursors[dbi];
while (*prev && *prev != mc) while (*prev) {
ENSURE(txn->env, (*prev)->signature == cur_signature_live || (*prev)->signature == cur_signature_wait4eot);
if (*prev == mc)
break;
prev = &(*prev)->next; prev = &(*prev)->next;
}
tASSERT(txn, *prev == mc); tASSERT(txn, *prev == mc);
*prev = mc->next; *prev = mc->next;
} }