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Code Issues Releases Activity

Protect vnode buffer chain manipulation with splbio to prevent list

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corruption..
This commit is contained in:
David Greenman 1994-12-23 04:52:55 +00:00
parent 66a5b326e1
commit 602d2b481a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=5201
2 changed files with 16 additions and 2 deletions
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9
sys/kern/vfs_export.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_subr.c 8.13 (Berkeley) 4/18/94
* $Id: vfs_subr.c,v 1.11 1994/10/05 09:48:22 davidg Exp $
* $Id: vfs_subr.c,v 1.12 1994/10/06 21:06:37 davidg Exp $
*/
/*
@ -521,6 +521,7 @@ bgetvp(vp, bp)
register struct vnode *vp;
register struct buf *bp;
{
int s;
if (bp->b_vp)
panic("bgetvp: not free");
@ -533,7 +534,9 @@ bgetvp(vp, bp)
/*
* Insert onto list for new vnode.
*/
s = splbio();
bufinsvn(bp, &vp->v_cleanblkhd);
splx(s);
}
/*
@ -544,14 +547,18 @@ brelvp(bp)
register struct buf *bp;
{
struct vnode *vp;
int s;
if (bp->b_vp == (struct vnode *) 0)
panic("brelvp: NULL");
/*
* Delete from old vnode list, if on one.
*/
s = splbio();
if (bp->b_vnbufs.le_next != NOLIST)
bufremvn(bp);
splx(s);
vp = bp->b_vp;
bp->b_vp = (struct vnode *) 0;
HOLDRELE(vp);

9
sys/kern/vfs_subr.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_subr.c 8.13 (Berkeley) 4/18/94
* $Id: vfs_subr.c,v 1.11 1994/10/05 09:48:22 davidg Exp $
* $Id: vfs_subr.c,v 1.12 1994/10/06 21:06:37 davidg Exp $
*/
/*
@ -521,6 +521,7 @@ bgetvp(vp, bp)
register struct vnode *vp;
register struct buf *bp;
{
int s;
if (bp->b_vp)
panic("bgetvp: not free");
@ -533,7 +534,9 @@ bgetvp(vp, bp)
/*
* Insert onto list for new vnode.
*/
s = splbio();
bufinsvn(bp, &vp->v_cleanblkhd);
splx(s);
}
/*
@ -544,14 +547,18 @@ brelvp(bp)
register struct buf *bp;
{
struct vnode *vp;
int s;
if (bp->b_vp == (struct vnode *) 0)
panic("brelvp: NULL");
/*
* Delete from old vnode list, if on one.
*/
s = splbio();
if (bp->b_vnbufs.le_next != NOLIST)
bufremvn(bp);
splx(s);
vp = bp->b_vp;
bp->b_vp = (struct vnode *) 0;
HOLDRELE(vp);