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Change procfs_lookup to not allow delete/rename operations

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to prevent panics when a user tries to remove/rename the
contents of /proc/###/*.

Obtained from: 4.4BSD-lite2
This commit is contained in:
Mike Pritchard 1995-09-02 18:28:48 +00:00
parent b406e662aa
commit efcc7f4218
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=10531
2 changed files with 12 additions and 6 deletions
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9
sys/fs/procfs/procfs_vnops.c
View file

@ -36,7 +36,7 @@
* *
* @(#)procfs_vnops.c 8.6 (Berkeley) 2/7/94 * @(#)procfs_vnops.c 8.6 (Berkeley) 2/7/94
* *
* $Id: procfs_vnops.c,v 1.14 1995/05/30 08:07:13 rgrimes Exp $ * $Id: procfs_vnops.c,v 1.15 1995/08/11 07:26:26 davidg Exp $
*/ */
/* /*
@ -536,6 +536,11 @@ procfs_lookup(ap)
pfstype pfs_type; pfstype pfs_type;
int i; int i;
*vpp = NULL;
if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)
return (EROFS);
if (cnp->cn_namelen == 1 && *pname == '.') { if (cnp->cn_namelen == 1 && *pname == '.') {
*vpp = dvp; *vpp = dvp;
VREF(dvp); VREF(dvp);
@ -543,8 +548,6 @@ procfs_lookup(ap)
return (0); return (0);
} }
*vpp = NULL;
pfs = VTOPFS(dvp); pfs = VTOPFS(dvp);
switch (pfs->pfs_type) { switch (pfs->pfs_type) {
case Proot: case Proot:

9
sys/miscfs/procfs/procfs_vnops.c
View file

@ -36,7 +36,7 @@
* *
* @(#)procfs_vnops.c 8.6 (Berkeley) 2/7/94 * @(#)procfs_vnops.c 8.6 (Berkeley) 2/7/94
* *
* $Id: procfs_vnops.c,v 1.14 1995/05/30 08:07:13 rgrimes Exp $ * $Id: procfs_vnops.c,v 1.15 1995/08/11 07:26:26 davidg Exp $
*/ */
/* /*
@ -536,6 +536,11 @@ procfs_lookup(ap)
pfstype pfs_type; pfstype pfs_type;
int i; int i;
*vpp = NULL;
if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)
return (EROFS);
if (cnp->cn_namelen == 1 && *pname == '.') { if (cnp->cn_namelen == 1 && *pname == '.') {
*vpp = dvp; *vpp = dvp;
VREF(dvp); VREF(dvp);
@ -543,8 +548,6 @@ procfs_lookup(ap)
return (0); return (0);
} }
*vpp = NULL;
pfs = VTOPFS(dvp); pfs = VTOPFS(dvp);
switch (pfs->pfs_type) { switch (pfs->pfs_type) {
case Proot: case Proot: