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PR: bin/8624

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Fixed intermediate calculation overflow when reporting users with > 2GB of
    disk space.
This commit is contained in:
Matthew Dillon 1998-12-13 07:16:05 +00:00
parent 65de0c7a93
commit 9983067ebe
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=41727
1 changed files with 5 additions and 2 deletions
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7
usr.sbin/quot/quot.c
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@ -31,7 +31,7 @@
#ifndef lint
static const char rcsid[] =
"$Id: quot.c,v 1.7 1997/10/10 06:31:07 charnier Exp $";
"$Id: quot.c,v 1.8 1998/01/17 16:45:03 bde Exp $";
#endif /* not lint */
#include <sys/param.h>
@ -66,11 +66,14 @@ static int headerlen;
* The new code always counts the number of 512 byte blocks
* instead of the number of kilobytes and converts them to
* kByte when done (on request).
*
* Due to the size of modern disks, we must cast intermediate
* values to 64 bits to prevent potential overflows.
*/
#ifdef COMPAT
#define SIZE(n) (n)
#else
#define SIZE(n) (((n) * 512 + blocksize - 1)/blocksize)
#define SIZE(n) ((int)(((quad_t)(n) * 512 + blocksize - 1)/blocksize))
#endif
#define INOCNT(fs) ((fs)->fs_ipg)