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Under certain circumstances, reading the /proc/*/map file can

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crash the system.  Nonexistant objects were not handled correctly.
This commit is contained in:
John Dyson 1996-07-27 18:28:10 +00:00
parent ce6bb53745
commit 34e95a26ec
2 changed files with 10 additions and 4 deletions
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7
sys/fs/procfs/procfs_map.c
View file

@ -36,7 +36,7 @@
*
* @(#)procfs_status.c 8.3 (Berkeley) 2/17/94
*
* $Id: procfs_map.c,v 1.1 1996/06/17 22:53:27 dyson Exp $
* $Id: procfs_map.c,v 1.2 1996/06/18 05:15:59 dyson Exp $
*/
#include <sys/param.h>
@ -128,7 +128,7 @@ procfs_domap(curp, p, pfs, uio)
for( lobj = tobj = obj; tobj; tobj = tobj->backing_object)
lobj = tobj;
switch(lobj->type) {
if (lobj) switch(lobj->type) {
default:
case OBJT_DEFAULT:
@ -143,7 +143,10 @@ case OBJT_SWAP:
case OBJT_DEVICE:
type = "device";
break;
} else {
type = "none";
}
/*
* format:

7
sys/miscfs/procfs/procfs_map.c
View file

@ -36,7 +36,7 @@
*
* @(#)procfs_status.c 8.3 (Berkeley) 2/17/94
*
* $Id: procfs_map.c,v 1.1 1996/06/17 22:53:27 dyson Exp $
* $Id: procfs_map.c,v 1.2 1996/06/18 05:15:59 dyson Exp $
*/
#include <sys/param.h>
@ -128,7 +128,7 @@ procfs_domap(curp, p, pfs, uio)
for( lobj = tobj = obj; tobj; tobj = tobj->backing_object)
lobj = tobj;
switch(lobj->type) {
if (lobj) switch(lobj->type) {
default:
case OBJT_DEFAULT:
@ -143,7 +143,10 @@ case OBJT_SWAP:
case OBJT_DEVICE:
type = "device";
break;
} else {
type = "none";
}
/*
* format: