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Code Issues

The simplest possible fix for CORE-3374: Server may crash or corrupt data if SELECT WITH LOCK is issued against records not in the latest format. Thanks to Vlad.

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dimitr 2011-03-04 17:59:15 +00:00
parent 1d169c297e
commit 7208ae1755
1 changed files with 4 additions and 3 deletions
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7
src/jrd/vio.cpp
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@ -3297,9 +3297,6 @@ bool VIO_writelock(thread_db* tdbb, record_param* org_rpb, RecordSource* rsb,
return false;
}
// jrd_rel* relation = org_rpb->rpb_relation;
if (org_rpb->rpb_transaction_nr == transaction->tra_number) {
// We already own this record. No writelock required
return true;
@ -3320,6 +3317,10 @@ bool VIO_writelock(thread_db* tdbb, record_param* org_rpb, RecordSource* rsb,
return false;
}
// The record could be reallocated in the meantime. Reassign the pointer.
org_record = org_rpb->rpb_record;
/* Old record was restored and re-fetched for write. Now replace it. */
org_rpb->rpb_transaction_nr = transaction->tra_number;