X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Modules%2FFilesystems%2FExt2%2Fext2.c;h=aa15e1033dd5fecd796050f3ce51e138cc55f35e;hb=f87b0ab247466133ae7a6be7ac72b95462ab2b81;hp=ac3d7e5c5fed14d7c216b09ed9c964d95458d567;hpb=775bf8013abe9fe4ef3d4883ea2e43bba2a84da1;p=tpg%2Facess2.git

diff --git a/Modules/Filesystems/Ext2/ext2.c b/Modules/Filesystems/Ext2/ext2.c
index ac3d7e5c..aa15e103 100644
--- a/Modules/Filesystems/Ext2/ext2.c
+++ b/Modules/Filesystems/Ext2/ext2.c
@@ -320,15 +320,17 @@ void Ext2_int_UpdateSuperblock(tExt2_Disk *Disk)
 	if(ngrp <= 1)	return;
 	VFS_WriteAt(Disk->FD, 1*bpg*Disk->BlockSize, 1024, &Disk->SuperBlock);
 	
+	#define INT_MAX	(((long long int)1<<(sizeof(int)*8))-1)
+	
 	// Powers of 3
-	for( i = 3; i < ngrp; i *= 3 )
+	for( i = 3; i < ngrp && i < INT_MAX; i *= 3 )
 		VFS_WriteAt(Disk->FD, i*bpg*Disk->BlockSize, 1024, &Disk->SuperBlock);
 	
 	// Powers of 5
-	for( i = 5; i < ngrp; i *= 5 )
+	for( i = 5; i < ngrp && i < INT_MAX/5; i *= 5 )
 		VFS_WriteAt(Disk->FD, i*bpg*Disk->BlockSize, 1024, &Disk->SuperBlock);
 	
 	// Powers of 7
-	for( i = 7; i < ngrp; i *= 7 )
+	for( i = 7; i < ngrp && i < INT_MAX/7; i *= 7 )
 		VFS_WriteAt(Disk->FD, i*bpg*Disk->BlockSize, 1024, &Disk->SuperBlock);
 }