v4-avoid-incomplete-copy-string-do_pg_backup_start.patch
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Filename: v4-avoid-incomplete-copy-string-do_pg_backup_start.patch
Type: application/octet-stream
Part: 0
Patch
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API reference →
Format: unified
Series: patch v4
| File | + | − |
|---|---|---|
| src/backend/access/transam/xlog.c | 2 | 4 |
| src/include/access/xlogbackup.h | 1 | 2 |
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 8dcdf5a764..01ed7d1ea0 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -8736,13 +8736,11 @@ do_pg_backup_start(const char *backupidstr, bool fast, List **tablespaces,
errmsg("WAL level not sufficient for making an online backup"),
errhint("\"wal_level\" must be set to \"replica\" or \"logical\" at server start.")));
- if (strlen(backupidstr) > MAXPGPATH)
+ if (strlcpy(state->name, backupidstr, sizeof(state->name)) >= sizeof(state->name))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("backup label too long (max %d bytes)",
- MAXPGPATH)));
-
- memcpy(state->name, backupidstr, strlen(backupidstr));
+ MAXPGPATH - 1)));
/*
* Mark backup active in shared memory. We must do full-page WAL writes
diff --git a/src/include/access/xlogbackup.h b/src/include/access/xlogbackup.h
index c30d4a5991..a52345850e 100644
--- a/src/include/access/xlogbackup.h
+++ b/src/include/access/xlogbackup.h
@@ -21,8 +21,7 @@
typedef struct BackupState
{
/* Fields saved at backup start */
- /* Backup label name one extra byte for null-termination */
- char name[MAXPGPATH + 1];
+ char name[MAXPGPATH];/* backup label name */
XLogRecPtr startpoint; /* backup start WAL location */
TimeLineID starttli; /* backup start TLI */
XLogRecPtr checkpointloc; /* last checkpoint location */