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Fix possible overflow problem in read size computation.

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This commit is contained in:
fvdl 1998-06-21 22:18:16 +00:00
parent 77a5ddd69a
commit 865838bfd7
1 changed files with 5 additions and 5 deletions
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10
sys/nfs/nfs_bio.c
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@ -1,4 +1,4 @@
/* $NetBSD: nfs_bio.c,v 1.42 1998/02/10 14:10:08 mrg Exp $ */
/* $NetBSD: nfs_bio.c,v 1.43 1998/06/21 22:18:16 fvdl Exp $ */
/*
* Copyright (c) 1989, 1993
@ -93,7 +93,7 @@ nfs_bioread(vp, uio, ioflag, cred, cflag)
int got_buf = 0, nra, error = 0, n = 0, on = 0, not_readin, en, enn;
int enough = 0;
struct dirent *dp, *pdp;
off_t curoff = 0;
off_t curoff = 0, offdiff;
#ifdef DIAGNOSTIC
if (uio->uio_rw != UIO_READ)
@ -269,9 +269,9 @@ again:
}
}
n = min((unsigned)(biosize - on), uio->uio_resid);
diff = np->n_size - uio->uio_offset;
if (diff < n)
n = diff;
offdiff = np->n_size - uio->uio_offset;
if (offdiff < (off_t)n)
n = (int)offdiff;
if (not_readin && n > 0) {
if (on < bp->b_validoff || (on + n) > bp->b_validend) {
if (!got_buf) {