Fix pg_restore to guard against unexpected EOF while reading an archive file.

Per report and partial patch from Chad Wagner.

4 files changed, 25 insertions, 20 deletions

diff --git a/src/bin/pg_dump/pg_backup_archiver.c b/src/bin/pg_dump/pg_backup_archiver.c
index e9af7d5fd06..392f9f9db52 100644
--- a/src/bin/pg_dump/pg_backup_archiver.c
+++ b/src/bin/pg_dump/pg_backup_archiver.c
@@ -15,7 +15,7 @@
  *
  *
  * IDENTIFICATION
- *		$PostgreSQL: pgsql/src/bin/pg_dump/pg_backup_archiver.c,v 1.101.4.9 2006/02/05 20:59:06 tgl Exp $
+ *		$PostgreSQL: pgsql/src/bin/pg_dump/pg_backup_archiver.c,v 1.101.4.10 2007/08/06 01:38:40 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -1513,7 +1513,7 @@ ReadStr(ArchiveHandle *AH)
 	int			l;
 
 	l = ReadInt(AH);
-	if (l == -1)
+	if (l < 0)
 		buf = NULL;
 	else
 	{
@@ -1521,7 +1521,9 @@ ReadStr(ArchiveHandle *AH)
 		if (!buf)
 			die_horribly(AH, modulename, "out of memory\n");
 
-		(*AH->ReadBufPtr) (AH, (void *) buf, l);
+		if ((*AH->ReadBufPtr) (AH, (void *) buf, l) != l)
+			die_horribly(AH, modulename, "unexpected end of file\n");
+
 		buf[l] = '\0';
 	}
 
@@ -2661,8 +2663,8 @@ ReadHead(ArchiveHandle *AH)
 	/* If we haven't already read the header... */
 	if (!AH->readHeader)
 	{
-
-		(*AH->ReadBufPtr) (AH, tmpMag, 5);
+		if ((*AH->ReadBufPtr) (AH, tmpMag, 5) != 5)
+			die_horribly(AH, modulename, "unexpected end of file\n");
 
 		if (strncmp(tmpMag, "PGDMP", 5) != 0)
 			die_horribly(AH, modulename, "did not find magic string in file header\n");
diff --git a/src/bin/pg_dump/pg_backup_custom.c b/src/bin/pg_dump/pg_backup_custom.c
index b8e8d2c9c46..904424651d6 100644
--- a/src/bin/pg_dump/pg_backup_custom.c
+++ b/src/bin/pg_dump/pg_backup_custom.c
@@ -19,7 +19,7 @@
  *
  *
  * IDENTIFICATION
- *		$PostgreSQL: pgsql/src/bin/pg_dump/pg_backup_custom.c,v 1.29.4.1 2005/01/25 22:44:47 tgl Exp $
+ *		$PostgreSQL: pgsql/src/bin/pg_dump/pg_backup_custom.c,v 1.29.4.2 2007/08/06 01:38:40 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -712,7 +712,7 @@ _WriteByte(ArchiveHandle *AH, const int i)
  *
  * Called by the archiver to read bytes & integers from the archive.
  * These routines are only used to read & write headers & TOC.
- *
+ * EOF should be treated as a fatal error.
  */
 static int
 _ReadByte(ArchiveHandle *AH)
@@ -720,9 +720,10 @@ _ReadByte(ArchiveHandle *AH)
 	lclContext *ctx = (lclContext *) AH->formatData;
 	int			res;
 
-	res = fgetc(AH->FH);
-	if (res != EOF)
-		ctx->filePos += 1;
+	res = getc(AH->FH);
+	if (res == EOF)
+		die_horribly(AH, modulename, "unexpected end of file\n");
+	ctx->filePos += 1;
 	return res;
 }
 
diff --git a/src/bin/pg_dump/pg_backup_files.c b/src/bin/pg_dump/pg_backup_files.c
index fc096211323..80da43eff28 100644
--- a/src/bin/pg_dump/pg_backup_files.c
+++ b/src/bin/pg_dump/pg_backup_files.c
@@ -20,7 +20,7 @@
  *
  *
  * IDENTIFICATION
- *		$PostgreSQL: pgsql/src/bin/pg_dump/pg_backup_files.c,v 1.25 2004/03/03 21:28:54 tgl Exp $
+ *		$PostgreSQL: pgsql/src/bin/pg_dump/pg_backup_files.c,v 1.25.4.1 2007/08/06 01:38:40 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -397,9 +397,10 @@ _ReadByte(ArchiveHandle *AH)
 	lclContext *ctx = (lclContext *) AH->formatData;
 	int			res;
 
-	res = fgetc(AH->FH);
-	if (res != EOF)
-		ctx->filePos += 1;
+	res = getc(AH->FH);
+	if (res == EOF)
+		die_horribly(AH, modulename, "unexpected end of file\n");
+	ctx->filePos += 1;
 	return res;
 }
 
diff --git a/src/bin/pg_dump/pg_backup_tar.c b/src/bin/pg_dump/pg_backup_tar.c
index adb5eba895b..f20fddae6aa 100644
--- a/src/bin/pg_dump/pg_backup_tar.c
+++ b/src/bin/pg_dump/pg_backup_tar.c
@@ -16,7 +16,7 @@
  *
  *
  * IDENTIFICATION
- *		$PostgreSQL: pgsql/src/bin/pg_dump/pg_backup_tar.c,v 1.46.4.2 2005/06/22 02:02:09 neilc Exp $
+ *		$PostgreSQL: pgsql/src/bin/pg_dump/pg_backup_tar.c,v 1.46.4.3 2007/08/06 01:38:40 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -483,7 +483,7 @@ _tarReadRaw(ArchiveHandle *AH, void *buf, size_t len, TAR_MEMBER *th, FILE *fh)
 			used = avail;
 
 		/* Copy, and adjust buffer pos */
-		memcpy(buf, AH->lookahead, used);
+		memcpy(buf, AH->lookahead + AH->lookaheadPos, used);
 		AH->lookaheadPos += used;
 
 		/* Adjust required length */
@@ -727,12 +727,13 @@ static int
 _ReadByte(ArchiveHandle *AH)
 {
 	lclContext *ctx = (lclContext *) AH->formatData;
-	int			res;
-	char		c = '\0';
+	size_t		res;
+	unsigned char c;
 
 	res = tarRead(&c, 1, ctx->FH);
-	if (res != EOF)
-		ctx->filePos += res;
+	if (res != 1)
+		die_horribly(AH, modulename, "unexpected end of file\n");
+	ctx->filePos += 1;
 	return c;
 }