Date: Fri, 4 Jul 2008 10:35:23 GMT From: Mateusz Guzik <mjguzik@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/125257: [jail][patch] Possible memory leak in function jail Message-ID: <200807041035.m64AZNhV092444@www.freebsd.org> Resent-Message-ID: <200807041040.m64Ae1Vd059872@freefall.freebsd.org>
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>Number: 125257
>Category: kern
>Synopsis: [jail][patch] Possible memory leak in function jail
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Jul 04 10:40:01 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator: Mateusz Guzik
>Release: 8.0-CURRENT
>Organization:
>Environment:
FreeBSD eternal 8.0-CURRENT FreeBSD 8.0-CURRENT #12: Fri Jul 4 12:16:30 CEST 2008 f@eternal:/usr/obj/usr/src/sys/ETERNAL i386
>Description:
Line 164 of sys/kern/kern_jail.c (rev 1.78) looks like this:
pr->pr_slots = malloc(sizeof(*pr->pr_slots) * prison_service_slots,
M_PRISON, M_ZERO | M_WAITOK);
But in case of failure, memmory allocated for pr->pr_slots is not freed. (Lines starting at 215.)
>How-To-Repeat:
>Fix:
Patch attached with submission follows:
--- sys/kern/kern_jail.c.orig 2008-07-04 12:11:43.000000000 +0200
+++ sys/kern/kern_jail.c 2008-07-04 12:33:45.000000000 +0200
@@ -212,10 +212,12 @@
vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount);
vrele(pr->pr_root);
VFS_UNLOCK_GIANT(vfslocked);
e_killmtx:
mtx_destroy(&pr->pr_mtx);
+ if (pr->pr_slots != NULL)
+ FREE(pr->pr_slots, M_PRISON);
FREE(pr, M_PRISON);
return (error);
}
/*
>Release-Note:
>Audit-Trail:
>Unformatted:
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