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Deal with the possibility of negative available space from the file server

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to avoid Bad Things(TM) happening (eg: df crashing with a floating point
exception).

Submitted by:	Harold Gutch <logix@foobar.franken.de>
Approved by:	re (scottl)
This commit is contained in:
Peter Wemm 2003-05-19 22:35:00 +00:00
parent 3830dc4629
commit 62d8fb93d0
1 changed files with 6 additions and 3 deletions
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9
sys/nfsclient/nfs_vfsops.c
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@ -277,15 +277,18 @@ nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
for (bsize = NFS_FABLKSIZE; ; bsize *= 2) {
sbp->f_bsize = bsize;
tquad = fxdr_hyper(&sfp->sf_tbytes);
if ((tquad / bsize) > LONG_MAX)
if (((long)(tquad / bsize) > LONG_MAX) ||
((long)(tquad / bsize) < LONG_MIN))
continue;
sbp->f_blocks = tquad / bsize;
tquad = fxdr_hyper(&sfp->sf_fbytes);
if ((tquad / bsize) > LONG_MAX)
if (((long)(tquad / bsize) > LONG_MAX) ||
((long)(tquad / bsize) < LONG_MIN))
continue;
sbp->f_bfree = tquad / bsize;
tquad = fxdr_hyper(&sfp->sf_abytes);
if ((tquad / bsize) > LONG_MAX)
if (((long)(tquad / bsize) > LONG_MAX) ||
((long)(tquad / bsize) < LONG_MIN))
continue;
sbp->f_bavail = tquad / bsize;
sbp->f_files = (fxdr_unsigned(int32_t,