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Add additional safety check against invalid backup label file

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It was already checking for invalid data after "BACKUP FROM", but
would possibly crash if "BACKUP FROM" was missing altogether.

found by Coverity
This commit is contained in:
Peter Eisentraut 2012-03-14 22:41:50 +02:00
parent acfaa596cc
commit e684ab5e1e
1 changed files with 1 additions and 1 deletions
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2
src/backend/access/transam/xlog.c
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@ -9481,7 +9481,7 @@ do_pg_stop_backup(char *labelfile, bool waitforarchive)
* during the backup.
*/
ptr = strstr(remaining, "BACKUP FROM:");
if (sscanf(ptr, "BACKUP FROM: %19s\n", backupfrom) != 1)
if (!ptr || sscanf(ptr, "BACKUP FROM: %19s\n", backupfrom) != 1)
ereport(ERROR,
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
errmsg("invalid data in file \"%s\"", BACKUP_LABEL_FILE)));