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Provide a better handling of partially corrupted directory entries.

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Submitted by:	bde
This commit is contained in:
Joerg Wunsch 1996-03-14 21:44:32 +00:00
parent d867405fbe
commit 81ec856a3b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=14625
2 changed files with 24 additions and 20 deletions
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22
sys/fs/cd9660/cd9660_vnops.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)cd9660_vnops.c 8.3 (Berkeley) 1/23/94
* $Id: cd9660_vnops.c,v 1.22 1995/11/20 03:57:50 dyson Exp $
* $Id: cd9660_vnops.c,v 1.23 1995/12/03 17:14:38 bde Exp $
*/
#include <sys/param.h>
@ -558,6 +558,7 @@ cd9660_readdir(ap)
int endsearch;
struct iso_directory_record *ep;
u_short elen;
int namlen;
int reclen;
int isoflags;
struct iso_mnt *imp;
@ -619,8 +620,6 @@ cd9660_readdir(ap)
(bp->b_un.b_addr + entryoffsetinblock);
reclen = isonum_711 (ep->length);
isoflags = isonum_711(imp->iso_ftype == ISO_FTYPE_HIGH_SIERRA?
&ep->date[6]: ep->flags);
if (reclen == 0) {
/* skip to next block, if any */
idp->curroff = roundup (idp->curroff,
@ -640,22 +639,25 @@ cd9660_readdir(ap)
break;
}
namlen = isonum_711 (ep->name_len);
if (reclen < ISO_DIRECTORY_RECORD_SIZE + namlen) {
error = EINVAL;
/* illegal entry, stop */
break;
}
/* XXX: be more intelligent if we can */
idp->current.d_type = DT_UNKNOWN;
idp->current.d_namlen = isonum_711 (ep->name_len);
idp->current.d_namlen = namlen;
isoflags = isonum_711(imp->iso_ftype == ISO_FTYPE_HIGH_SIERRA?
&ep->date[6]: ep->flags);
if (isoflags & 2)
isodirino(&idp->current.d_fileno,ep,imp);
else
idp->current.d_fileno = dbtob(bp->b_blkno) +
idp->curroff;
if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
error = EINVAL;
/* illegal entry, stop */
break;
}
idp->curroff += reclen;
/*
*

22
sys/isofs/cd9660/cd9660_vnops.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)cd9660_vnops.c 8.3 (Berkeley) 1/23/94
* $Id: cd9660_vnops.c,v 1.22 1995/11/20 03:57:50 dyson Exp $
* $Id: cd9660_vnops.c,v 1.23 1995/12/03 17:14:38 bde Exp $
*/
#include <sys/param.h>
@ -558,6 +558,7 @@ cd9660_readdir(ap)
int endsearch;
struct iso_directory_record *ep;
u_short elen;
int namlen;
int reclen;
int isoflags;
struct iso_mnt *imp;
@ -619,8 +620,6 @@ cd9660_readdir(ap)
(bp->b_un.b_addr + entryoffsetinblock);
reclen = isonum_711 (ep->length);
isoflags = isonum_711(imp->iso_ftype == ISO_FTYPE_HIGH_SIERRA?
&ep->date[6]: ep->flags);
if (reclen == 0) {
/* skip to next block, if any */
idp->curroff = roundup (idp->curroff,
@ -640,22 +639,25 @@ cd9660_readdir(ap)
break;
}
namlen = isonum_711 (ep->name_len);
if (reclen < ISO_DIRECTORY_RECORD_SIZE + namlen) {
error = EINVAL;
/* illegal entry, stop */
break;
}
/* XXX: be more intelligent if we can */
idp->current.d_type = DT_UNKNOWN;
idp->current.d_namlen = isonum_711 (ep->name_len);
idp->current.d_namlen = namlen;
isoflags = isonum_711(imp->iso_ftype == ISO_FTYPE_HIGH_SIERRA?
&ep->date[6]: ep->flags);
if (isoflags & 2)
isodirino(&idp->current.d_fileno,ep,imp);
else
idp->current.d_fileno = dbtob(bp->b_blkno) +
idp->curroff;
if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
error = EINVAL;
/* illegal entry, stop */
break;
}
idp->curroff += reclen;
/*
*