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mdbx: fix segfault and double-free (in case twice abortion of the same write-txn).

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This commit is contained in:
Leo Yuriev 2017-05-25 18:37:47 +03:00
parent 96de36baef
commit b9dbe7c577
1 changed files with 20 additions and 17 deletions
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3
src/mdbx.c
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@ -2345,6 +2345,7 @@ uint64_t mdbx_txn_id(MDBX_txn *txn) {
/* Export or close DBI handles opened in this txn. */
static void mdbx_dbis_update(MDBX_txn *txn, int keep) {
MDBX_dbi n = txn->mt_numdbs;
if (n) {
MDBX_env *env = txn->mt_env;
uint8_t *tdbflags = txn->mt_dbflags;
@ -2367,6 +2368,7 @@ static void mdbx_dbis_update(MDBX_txn *txn, int keep) {
if (keep && env->me_numdbs < n)
env->me_numdbs = n;
}
}
/* End a transaction, except successful commit of a nested transaction.
* May be called twice for readonly txns: First reset it, then abort.
@ -2447,6 +2449,7 @@ static int mdbx_txn_end(MDBX_txn *txn, unsigned mode) {
if (mode & MDBX_END_FREE) {
txn->mt_signature = 0;
if (txn != env->me_txn0)
free(txn);
}