Major fixes for procfs..
Implement a "variable" directory structure. Files that do not make sense for the given process do not "appear" and cannot be opened. For example, "system" processes do not have "file", "regs" or "fpregs", because they do not have a user area. "attempt" to fill in the user area of a given process when it is being accessed via /proc/pid/mem (the user struct is just after VM_MAXUSER_ADDRESS in the process address space.) Dont do IO to the U area while it's swapped, hold it in place if possible. Lock off access to the "ctl" file if it's done a setuid like the other pseudo-files in there.
This commit is contained in:
peter
parent
9f25bbeb48
commit
fccbd175ce
@ -36,7 +36,7 @@
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*
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* @(#)procfs.h 8.6 (Berkeley) 2/3/94
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*
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* $Id: procfs.h,v 1.7 1995/11/09 08:16:01 bde Exp $
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* $Id: procfs.h,v 1.8 1995/11/16 11:39:09 bde Exp $
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*/
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/*
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@ -134,6 +134,11 @@ extern int procfs_domem __P((struct proc *, struct proc *, struct pfsnode *pfsp,
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extern int procfs_doctl __P((struct proc *, struct proc *, struct pfsnode *pfsp, struct uio *uio));
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extern int procfs_dostatus __P((struct proc *, struct proc *, struct pfsnode *pfsp, struct uio *uio));
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/* check to see if the process has the "items" (regs/file) */
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int procfs_validfile __P((struct proc *));
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int procfs_validfpregs __P((struct proc *));
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int procfs_validregs __P((struct proc *));
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#define PROCFS_LOCKED 0x01
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#define PROCFS_WANT 0x02
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@ -36,7 +36,7 @@
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*
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* @(#)procfs_ctl.c 8.3 (Berkeley) 1/21/94
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*
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* $Id: procfs_ctl.c,v 1.7 1995/12/03 14:54:34 bde Exp $
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* $Id: procfs_ctl.c,v 1.8 1995/12/07 12:47:14 davidg Exp $
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*/
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#include <sys/param.h>
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@ -72,8 +72,6 @@
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procfs_fix_sstep(p); \
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} \
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}
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#else
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#define FIX_SSTEP(p)
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#endif
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#define PROCFS_CTL_ATTACH 1
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@ -171,10 +169,13 @@ procfs_control(curp, p, op)
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return (EBUSY);
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}
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#ifdef FIX_SSTEP
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/*
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* do single-step fixup if needed
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*/
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FIX_SSTEP(p);
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#endif
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/*
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* Don't deliver any signal by default.
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@ -218,7 +219,9 @@ procfs_control(curp, p, op)
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* Step. Let the target process execute a single instruction.
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*/
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case PROCFS_CTL_STEP:
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PHOLD(p);
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procfs_sstep(p);
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PRELE(p);
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break;
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/*
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@ -301,7 +304,9 @@ procfs_doctl(curp, p, pfs, uio)
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if (nm) {
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if (TRACE_WAIT_P(curp, p)) {
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p->p_xstat = nm->nm_val;
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#ifdef FIX_SSTEP
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FIX_SSTEP(p);
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#endif
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setrunnable(p);
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} else {
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psignal(p, nm->nm_val);
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@ -36,7 +36,7 @@
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*
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* @(#)procfs_fpregs.c 8.1 (Berkeley) 1/27/94
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*
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* $Id: procfs_fpregs.c,v 1.1.1.1 1994/05/24 10:05:09 rgrimes Exp $
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* $Id: procfs_fpregs.c,v 1.2 1994/08/02 07:45:12 davidg Exp $
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*/
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#include <sys/param.h>
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@ -47,6 +47,8 @@
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#include <sys/vnode.h>
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#include <machine/reg.h>
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#include <miscfs/procfs/procfs.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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int
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procfs_dofpregs(curp, p, pfs, uio)
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@ -68,6 +70,8 @@ procfs_dofpregs(curp, p, pfs, uio)
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if (kl > uio->uio_resid)
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kl = uio->uio_resid;
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PHOLD(p);
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if (kl < 0)
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error = EINVAL;
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else
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@ -80,7 +84,15 @@ procfs_dofpregs(curp, p, pfs, uio)
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else
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error = procfs_write_fpregs(p, &r);
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}
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PRELE(p);
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uio->uio_offset = 0;
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return (error);
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}
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int
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procfs_validfpregs(p)
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struct proc *p;
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{
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return ((p->p_flag & P_SYSTEM) == 0);
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}
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@ -37,7 +37,7 @@
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*
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* @(#)procfs_mem.c 8.4 (Berkeley) 1/21/94
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*
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* $Id: procfs_mem.c,v 1.14 1995/12/17 07:19:24 bde Exp $
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* $Id: procfs_mem.c,v 1.15 1996/01/19 03:58:32 dyson Exp $
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*/
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/*
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@ -62,6 +62,7 @@
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/vm_extern.h>
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#include <sys/user.h>
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static int procfs_rwmem __P((struct proc *p, struct uio *uio));
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@ -96,10 +97,18 @@ procfs_rwmem(p, uio)
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uva = (vm_offset_t) uio->uio_offset;
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if (uva >= VM_MAXUSER_ADDRESS) {
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if (writing || (uva >= (VM_MAXUSER_ADDRESS + UPAGES * PAGE_SIZE))) {
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error = 0;
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break;
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}
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/* we are reading the "U area", fill it in */
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PHOLD(p);
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if (p->p_flag & P_INMEM) {
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p->p_addr->u_kproc.kp_proc = *p;
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fill_eproc (p, &p->p_addr->u_kproc.kp_eproc);
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}
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PRELE(p);
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}
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/*
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@ -36,7 +36,7 @@
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*
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* @(#)procfs_regs.c 8.3 (Berkeley) 1/27/94
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*
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* $Id: procfs_regs.c,v 1.1.1.1 1994/05/24 10:05:08 rgrimes Exp $
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* $Id: procfs_regs.c,v 1.2 1994/08/02 07:45:18 davidg Exp $
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*/
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#include <sys/param.h>
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@ -47,6 +47,8 @@
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#include <sys/vnode.h>
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#include <machine/reg.h>
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#include <miscfs/procfs/procfs.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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int
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procfs_doregs(curp, p, pfs, uio)
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@ -68,6 +70,8 @@ procfs_doregs(curp, p, pfs, uio)
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if (kl > uio->uio_resid)
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kl = uio->uio_resid;
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PHOLD(p);
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if (kl < 0)
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error = EINVAL;
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else
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@ -80,7 +84,15 @@ procfs_doregs(curp, p, pfs, uio)
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else
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error = procfs_write_regs(p, &r);
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}
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PRELE(p);
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uio->uio_offset = 0;
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return (error);
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}
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int
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procfs_validregs(p)
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struct proc *p;
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{
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return ((p->p_flag & P_SYSTEM) == 0);
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}
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@ -36,7 +36,7 @@
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*
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* @(#)procfs_vnops.c 8.6 (Berkeley) 2/7/94
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*
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* $Id: procfs_vnops.c,v 1.18 1995/11/09 08:16:04 bde Exp $
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* $Id: procfs_vnops.c,v 1.19 1995/11/16 11:39:11 bde Exp $
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*/
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/*
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@ -81,21 +81,20 @@ static struct pfsnames {
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u_short d_namlen;
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char d_name[PROCFS_NAMELEN];
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pfstype d_pfstype;
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int (*d_valid) __P((struct proc *));
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} procent[] = {
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#define N(s) sizeof(s)-1, s
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/* namlen, nam, type */
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{ N("."), Pproc },
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{ N(".."), Proot },
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#if 0
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{ N("file"), Pfile },
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#endif
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{ N("mem"), Pmem },
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{ N("regs"), Pregs },
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{ N("fpregs"), Pfpregs },
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{ N("ctl"), Pctl },
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{ N("status"), Pstatus },
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{ N("note"), Pnote },
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{ N("notepg"), Pnotepg },
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/* namlen, nam, type validp */
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{ N("."), Pproc, NULL },
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{ N(".."), Proot, NULL },
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{ N("file"), Pfile, procfs_validfile },
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{ N("mem"), Pmem, NULL },
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{ N("regs"), Pregs, procfs_validregs },
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{ N("fpregs"), Pfpregs, procfs_validfpregs },
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{ N("ctl"), Pctl, NULL },
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{ N("status"), Pstatus, NULL },
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{ N("note"), Pnote, NULL },
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{ N("notepg"), Pnotepg, NULL },
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#undef N
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};
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#define Nprocent (sizeof(procent)/sizeof(procent[0]))
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@ -356,6 +355,7 @@ procfs_getattr(ap)
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* that only root can gain access.
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*/
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switch (pfs->pfs_type) {
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case Pctl:
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case Pregs:
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case Pfpregs:
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if (procp->p_flag & P_SUGID)
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@ -599,7 +599,8 @@ procfs_lookup(ap)
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struct pfsnames *dp = &procent[i];
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if (cnp->cn_namelen == dp->d_namlen &&
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bcmp(pname, dp->d_name, dp->d_namlen) == 0) {
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bcmp(pname, dp->d_name, dp->d_namlen) == 0 &&
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(dp->d_valid == NULL || (*dp->d_valid)(procp))) {
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pfs_type = dp->d_pfstype;
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goto found;
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}
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@ -632,6 +633,16 @@ procfs_lookup(ap)
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}
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}
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/*
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* Does this process have a text file?
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*/
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int
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procfs_validfile(p)
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struct proc *p;
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{
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return (procfs_findtextvp(p) != NULLVP);
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}
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/*
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* readdir returns directory entries from pfsnode (vp).
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*
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@ -676,6 +687,12 @@ procfs_readdir(ap)
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* from the procent[] table (top of this file).
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*/
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case Pproc: {
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struct proc *p;
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p = PFIND(pfs->pfs_pid);
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if (p == NULL)
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break;
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while (uio->uio_resid >= UIO_MX) {
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struct pfsnames *dt;
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@ -684,6 +701,12 @@ procfs_readdir(ap)
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dt = &procent[i];
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/* see if we should show this one. */
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if (dt->d_valid && (*dt->d_valid)(p) == 0) {
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i++;
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continue;
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}
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dp->d_reclen = UIO_MX;
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dp->d_fileno = PROCFS_FILENO(pfs->pfs_pid, dt->d_pfstype);
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dp->d_type = DT_REG;
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@ -36,7 +36,7 @@
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*
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* @(#)procfs.h 8.6 (Berkeley) 2/3/94
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*
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* $Id: procfs.h,v 1.7 1995/11/09 08:16:01 bde Exp $
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* $Id: procfs.h,v 1.8 1995/11/16 11:39:09 bde Exp $
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*/
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/*
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@ -134,6 +134,11 @@ extern int procfs_domem __P((struct proc *, struct proc *, struct pfsnode *pfsp,
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extern int procfs_doctl __P((struct proc *, struct proc *, struct pfsnode *pfsp, struct uio *uio));
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extern int procfs_dostatus __P((struct proc *, struct proc *, struct pfsnode *pfsp, struct uio *uio));
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/* check to see if the process has the "items" (regs/file) */
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int procfs_validfile __P((struct proc *));
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int procfs_validfpregs __P((struct proc *));
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int procfs_validregs __P((struct proc *));
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#define PROCFS_LOCKED 0x01
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#define PROCFS_WANT 0x02
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@ -36,7 +36,7 @@
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*
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* @(#)procfs_ctl.c 8.3 (Berkeley) 1/21/94
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*
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* $Id: procfs_ctl.c,v 1.7 1995/12/03 14:54:34 bde Exp $
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* $Id: procfs_ctl.c,v 1.8 1995/12/07 12:47:14 davidg Exp $
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*/
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#include <sys/param.h>
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@ -72,8 +72,6 @@
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procfs_fix_sstep(p); \
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} \
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}
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#else
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#define FIX_SSTEP(p)
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#endif
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#define PROCFS_CTL_ATTACH 1
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@ -171,10 +169,13 @@ procfs_control(curp, p, op)
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return (EBUSY);
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}
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#ifdef FIX_SSTEP
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/*
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* do single-step fixup if needed
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*/
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FIX_SSTEP(p);
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#endif
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/*
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* Don't deliver any signal by default.
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@ -218,7 +219,9 @@ procfs_control(curp, p, op)
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* Step. Let the target process execute a single instruction.
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*/
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case PROCFS_CTL_STEP:
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PHOLD(p);
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procfs_sstep(p);
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PRELE(p);
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break;
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/*
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@ -301,7 +304,9 @@ procfs_doctl(curp, p, pfs, uio)
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if (nm) {
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if (TRACE_WAIT_P(curp, p)) {
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p->p_xstat = nm->nm_val;
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#ifdef FIX_SSTEP
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FIX_SSTEP(p);
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#endif
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setrunnable(p);
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} else {
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psignal(p, nm->nm_val);
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@ -36,7 +36,7 @@
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*
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* @(#)procfs_fpregs.c 8.1 (Berkeley) 1/27/94
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*
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* $Id: procfs_fpregs.c,v 1.1.1.1 1994/05/24 10:05:09 rgrimes Exp $
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* $Id: procfs_fpregs.c,v 1.2 1994/08/02 07:45:12 davidg Exp $
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*/
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#include <sys/param.h>
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@ -47,6 +47,8 @@
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#include <sys/vnode.h>
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#include <machine/reg.h>
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#include <miscfs/procfs/procfs.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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int
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procfs_dofpregs(curp, p, pfs, uio)
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@ -68,6 +70,8 @@ procfs_dofpregs(curp, p, pfs, uio)
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if (kl > uio->uio_resid)
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kl = uio->uio_resid;
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PHOLD(p);
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if (kl < 0)
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error = EINVAL;
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else
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@ -80,7 +84,15 @@ procfs_dofpregs(curp, p, pfs, uio)
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else
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error = procfs_write_fpregs(p, &r);
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}
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PRELE(p);
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uio->uio_offset = 0;
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return (error);
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}
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int
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procfs_validfpregs(p)
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struct proc *p;
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{
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return ((p->p_flag & P_SYSTEM) == 0);
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}
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@ -37,7 +37,7 @@
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*
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* @(#)procfs_mem.c 8.4 (Berkeley) 1/21/94
|
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*
|
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* $Id: procfs_mem.c,v 1.14 1995/12/17 07:19:24 bde Exp $
|
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* $Id: procfs_mem.c,v 1.15 1996/01/19 03:58:32 dyson Exp $
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*/
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/*
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@ -62,6 +62,7 @@
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/vm_extern.h>
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#include <sys/user.h>
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static int procfs_rwmem __P((struct proc *p, struct uio *uio));
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@ -96,10 +97,18 @@ procfs_rwmem(p, uio)
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uva = (vm_offset_t) uio->uio_offset;
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if (uva >= VM_MAXUSER_ADDRESS) {
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|
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if (writing || (uva >= (VM_MAXUSER_ADDRESS + UPAGES * PAGE_SIZE))) {
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error = 0;
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break;
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}
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/* we are reading the "U area", fill it in */
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PHOLD(p);
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if (p->p_flag & P_INMEM) {
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p->p_addr->u_kproc.kp_proc = *p;
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fill_eproc (p, &p->p_addr->u_kproc.kp_eproc);
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}
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PRELE(p);
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}
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/*
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@ -36,7 +36,7 @@
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*
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* @(#)procfs_regs.c 8.3 (Berkeley) 1/27/94
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*
|
||||
* $Id: procfs_regs.c,v 1.1.1.1 1994/05/24 10:05:08 rgrimes Exp $
|
||||
* $Id: procfs_regs.c,v 1.2 1994/08/02 07:45:18 davidg Exp $
|
||||
*/
|
||||
|
||||
#include <sys/param.h>
|
||||
@ -47,6 +47,8 @@
|
||||
#include <sys/vnode.h>
|
||||
#include <machine/reg.h>
|
||||
#include <miscfs/procfs/procfs.h>
|
||||
#include <vm/vm.h>
|
||||
#include <vm/vm_extern.h>
|
||||
|
||||
int
|
||||
procfs_doregs(curp, p, pfs, uio)
|
||||
@ -68,6 +70,8 @@ procfs_doregs(curp, p, pfs, uio)
|
||||
if (kl > uio->uio_resid)
|
||||
kl = uio->uio_resid;
|
||||
|
||||
PHOLD(p);
|
||||
|
||||
if (kl < 0)
|
||||
error = EINVAL;
|
||||
else
|
||||
@ -80,7 +84,15 @@ procfs_doregs(curp, p, pfs, uio)
|
||||
else
|
||||
error = procfs_write_regs(p, &r);
|
||||
}
|
||||
PRELE(p);
|
||||
|
||||
uio->uio_offset = 0;
|
||||
return (error);
|
||||
}
|
||||
|
||||
int
|
||||
procfs_validregs(p)
|
||||
struct proc *p;
|
||||
{
|
||||
return ((p->p_flag & P_SYSTEM) == 0);
|
||||
}
|
||||
|
||||
@ -36,7 +36,7 @@
|
||||
*
|
||||
* @(#)procfs_vnops.c 8.6 (Berkeley) 2/7/94
|
||||
*
|
||||
* $Id: procfs_vnops.c,v 1.18 1995/11/09 08:16:04 bde Exp $
|
||||
* $Id: procfs_vnops.c,v 1.19 1995/11/16 11:39:11 bde Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -81,21 +81,20 @@ static struct pfsnames {
|
||||
u_short d_namlen;
|
||||
char d_name[PROCFS_NAMELEN];
|
||||
pfstype d_pfstype;
|
||||
int (*d_valid) __P((struct proc *));
|
||||
} procent[] = {
|
||||
#define N(s) sizeof(s)-1, s
|
||||
/* namlen, nam, type */
|
||||
{ N("."), Pproc },
|
||||
{ N(".."), Proot },
|
||||
#if 0
|
||||
{ N("file"), Pfile },
|
||||
#endif
|
||||
{ N("mem"), Pmem },
|
||||
{ N("regs"), Pregs },
|
||||
{ N("fpregs"), Pfpregs },
|
||||
{ N("ctl"), Pctl },
|
||||
{ N("status"), Pstatus },
|
||||
{ N("note"), Pnote },
|
||||
{ N("notepg"), Pnotepg },
|
||||
/* namlen, nam, type validp */
|
||||
{ N("."), Pproc, NULL },
|
||||
{ N(".."), Proot, NULL },
|
||||
{ N("file"), Pfile, procfs_validfile },
|
||||
{ N("mem"), Pmem, NULL },
|
||||
{ N("regs"), Pregs, procfs_validregs },
|
||||
{ N("fpregs"), Pfpregs, procfs_validfpregs },
|
||||
{ N("ctl"), Pctl, NULL },
|
||||
{ N("status"), Pstatus, NULL },
|
||||
{ N("note"), Pnote, NULL },
|
||||
{ N("notepg"), Pnotepg, NULL },
|
||||
#undef N
|
||||
};
|
||||
#define Nprocent (sizeof(procent)/sizeof(procent[0]))
|
||||
@ -356,6 +355,7 @@ procfs_getattr(ap)
|
||||
* that only root can gain access.
|
||||
*/
|
||||
switch (pfs->pfs_type) {
|
||||
case Pctl:
|
||||
case Pregs:
|
||||
case Pfpregs:
|
||||
if (procp->p_flag & P_SUGID)
|
||||
@ -599,7 +599,8 @@ procfs_lookup(ap)
|
||||
struct pfsnames *dp = &procent[i];
|
||||
|
||||
if (cnp->cn_namelen == dp->d_namlen &&
|
||||
bcmp(pname, dp->d_name, dp->d_namlen) == 0) {
|
||||
bcmp(pname, dp->d_name, dp->d_namlen) == 0 &&
|
||||
(dp->d_valid == NULL || (*dp->d_valid)(procp))) {
|
||||
pfs_type = dp->d_pfstype;
|
||||
goto found;
|
||||
}
|
||||
@ -632,6 +633,16 @@ procfs_lookup(ap)
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Does this process have a text file?
|
||||
*/
|
||||
int
|
||||
procfs_validfile(p)
|
||||
struct proc *p;
|
||||
{
|
||||
return (procfs_findtextvp(p) != NULLVP);
|
||||
}
|
||||
|
||||
/*
|
||||
* readdir returns directory entries from pfsnode (vp).
|
||||
*
|
||||
@ -676,6 +687,12 @@ procfs_readdir(ap)
|
||||
* from the procent[] table (top of this file).
|
||||
*/
|
||||
case Pproc: {
|
||||
struct proc *p;
|
||||
|
||||
p = PFIND(pfs->pfs_pid);
|
||||
if (p == NULL)
|
||||
break;
|
||||
|
||||
while (uio->uio_resid >= UIO_MX) {
|
||||
struct pfsnames *dt;
|
||||
|
||||
@ -684,6 +701,12 @@ procfs_readdir(ap)
|
||||
|
||||
dt = &procent[i];
|
||||
|
||||
/* see if we should show this one. */
|
||||
if (dt->d_valid && (*dt->d_valid)(p) == 0) {
|
||||
i++;
|
||||
continue;
|
||||
}
|
||||
|
||||
dp->d_reclen = UIO_MX;
|
||||
dp->d_fileno = PROCFS_FILENO(pfs->pfs_pid, dt->d_pfstype);
|
||||
dp->d_type = DT_REG;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user