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Only allow root to set file flags on devices.

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This commit is contained in:
Warner Losh 1999-08-02 21:34:46 +00:00
parent 9a65a1c94d
commit f76f09c129
2 changed files with 16 additions and 2 deletions
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9
sys/kern/vfs_extattr.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
* $Id: vfs_syscalls.c,v 1.124 1999/07/26 06:25:18 alc Exp $
* $Id: vfs_syscalls.c,v 1.125 1999/07/29 17:02:56 green Exp $
*/
/* For 4.3 integer FS ID compatibility */
@ -1892,6 +1892,13 @@ setfflags(p, vp, flags)
int error;
struct vattr vattr;
if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)))
return error;
/*
* Don't allow setting of flags on devices for nonroot users
*/
if ((vattr.va_type == VCHR || vattr.va_type == VBLK) && suser(p))
return 0;
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
VATTR_NULL(&vattr);

9
sys/kern/vfs_syscalls.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94
* $Id: vfs_syscalls.c,v 1.124 1999/07/26 06:25:18 alc Exp $
* $Id: vfs_syscalls.c,v 1.125 1999/07/29 17:02:56 green Exp $
*/
/* For 4.3 integer FS ID compatibility */
@ -1892,6 +1892,13 @@ setfflags(p, vp, flags)
int error;
struct vattr vattr;
if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)))
return error;
/*
* Don't allow setting of flags on devices for nonroot users
*/
if ((vattr.va_type == VCHR || vattr.va_type == VBLK) && suser(p))
return 0;
VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
VATTR_NULL(&vattr);