Date: Tue, 26 Aug 1997 19:11:03 +0400 (MSD) From: Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru> To: FreeBSD-gnats-submit@FreeBSD.ORG Cc: julian@FreeBSD.ORG Subject: kern/4397: DEVFS trashes memory in umount Message-ID: <199708261511.TAA00687@tejblum.dnttm.rssi.ru> Resent-Message-ID: <199708261520.IAA16416@hub.freebsd.org>
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>Number: 4397
>Category: kern
>Synopsis: DEVFS trashes memory in umount
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Aug 26 08:20:03 PDT 1997
>Last-Modified:
>Originator: Dmitrij Tejblum
>Organization:
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
>Description:
List of links to one device is not properly linked. This caused memory trash
when the list is destroyed.
>How-To-Repeat:
unmount DEVFS and then mount it again. You may see message
'Data modified on freelist' printed on console.
>Fix:
--- devfs_tree.c.02 Tue Aug 26 00:44:04 1997
+++ devfs_tree.c Tue Aug 26 00:51:07 1997
@@ -271,6 +271,7 @@
devnmp->nextlink = dnp->linklist;
devnmp->prevlinkp = devnmp->nextlink->prevlinkp;
devnmp->nextlink->prevlinkp = &(devnmp->nextlink);
+ *devnmp->prevlinkp = devnmp;
dnp->linklist = devnmp;
} else {
devnmp->nextlink = devnmp;
>Audit-Trail:
>Unformatted:
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