Fix off_t overflow in pg_basebackup on Windows.

walmethods.c used off_t to navigate around a pg_wal.tar file that could
exceed 2GB, which doesn't work on Windows and would fail with misleading
errors.  Use pgoff_t instead.

Back-patch to all supported branches.

Author: Davinder Singh <davinder.singh@enterprisedb.com>
Reported-by: Jakub Wartak <jakub.wartak@enterprisedb.com>
Discussion: https://postgr.es/m/CAKZiRmyM4YnokK6Oenw5JKwAQ3rhP0YTz2T-tiw5dAQjGRXE3Q%40mail.gmail.com

diff --git a/src/bin/pg_basebackup/receivelog.c b/src/bin/pg_basebackup/receivelog.c
index 70f4246764950ddbcece524f24267b539b95efd9..8543f3576a85d9a890cf8726570dd294934b801b 100644 (file)
--- a/src/bin/pg_basebackup/receivelog.c
+++ b/src/bin/pg_basebackup/receivelog.c
@@ -192,7 +192,7 @@ static bool
 close_walfile(StreamCtl *stream, XLogRecPtr pos)
 {
        char       *fn;
-       off_t           currpos;
+       pgoff_t         currpos;
        int                     r;
        char            walfile_name[MAXPGPATH];
 

diff --git a/src/bin/pg_basebackup/walmethods.c b/src/bin/pg_basebackup/walmethods.c
index f17600de9d245c37fdc9a68bdd517788932ea579..935429ea1e8198bca16d5cb567a2ed740c5c3d85 100644 (file)
--- a/src/bin/pg_basebackup/walmethods.c
+++ b/src/bin/pg_basebackup/walmethods.c
@@ -691,7 +691,7 @@ const WalWriteMethodOps WalTarMethodOps = {
 typedef struct TarMethodFile
 {
        Walfile         base;
-       off_t           ofs_start;              /* Where does the *header* for this file start */
+       pgoff_t         ofs_start;              /* Where does the *header* for this file start */
        char            header[TAR_BLOCK_SIZE];
        size_t          pad_to_size;
 } TarMethodFile;

diff --git a/src/bin/pg_basebackup/walmethods.h b/src/bin/pg_basebackup/walmethods.h
index c9042600f950ce017b5c2160b401357e43a72c6a..488dd8f92d33003f9a8f18e14939dc3bd5744e90 100644 (file)
--- a/src/bin/pg_basebackup/walmethods.h
+++ b/src/bin/pg_basebackup/walmethods.h
@@ -17,7 +17,7 @@ typedef struct WalWriteMethod WalWriteMethod;
 typedef struct
 {
        WalWriteMethod *wwmethod;
-       off_t           currpos;
+       pgoff_t         currpos;
        char       *pathname;
 
        /*