Date: Tue, 16 Dec 1997 02:00:03 -0800 (PST) From: Bruce Evans <bde@zeta.org.au> To: freebsd-bugs Subject: Re: kern/5313: panic: free: multiple frees Message-ID: <199712161000.CAA12703@hub.freebsd.org>
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The following reply was made to PR kern/5313; it has been noted by GNATS.
From: Bruce Evans <bde@zeta.org.au>
To: dima@best.net, FreeBSD-gnats-submit@FreeBSD.ORG
Cc: Subject: Re: kern/5313: panic: free: multiple frees
Date: Tue, 16 Dec 1997 20:53:06 +1100
>#9 0xf011329a in panic (fmt=0xf010fca7 "free: multiple frees")
> at ../../kern/kern_shutdown.c:388
>#10 0xf010fd87 in free (addr=0xf5dbd000, type=0x4a)
> at ../../kern/kern_malloc.c:342
There is one obvious problem. imgp->image_header needs to be cleared
in both arms of the if statement since it is always set). This fix has
not been tested.
Bruce
diff -c2 kern_exec.c~ kern_exec.c
*** kern_exec.c~ Mon Dec 8 06:07:52 1997
--- kern_exec.c Tue Dec 16 20:47:32 1997
***************
*** 219,226 ****
brelse(bp);
bp = NULL;
! } else {
free((void *)imgp->image_header, M_TEMP);
! imgp->image_header = NULL;
! }
/* free old vnode and name buffer */
vrele(ndp->ni_vp);
--- 218,224 ----
brelse(bp);
bp = NULL;
! } else
free((void *)imgp->image_header, M_TEMP);
! imgp->image_header = NULL;
/* free old vnode and name buffer */
vrele(ndp->ni_vp);
help
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