Date: Tue, 12 Jun 2001 05:28:40 -0700 (PDT) From: conrad@th.physik.uni-bonn.de To: freebsd-gnats-submit@FreeBSD.org Subject: i386/28098: mbus leakage in FreeBSD 4.3R somewhere Message-ID: <200106121228.f5CCSe678796@freefall.freebsd.org>
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>Number: 28098
>Category: i386
>Synopsis: mbus leakage in FreeBSD 4.3R somewhere
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Jun 12 05:30:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: Jan Conrad
>Release: FreeBSD 4.3R
>Organization:
Univ. Bonn, Germany
>Environment:
FreeBSD wigner.th.physik.uni-bonn.de 4.3-RELEASE FreeBSD 4.3-RELEASE #1: Thu May 24 18:01:27 CEST 2001 conrad@merlin.th.physik.uni-bonn.de:/freebsd/misc/src/sys/compile/MERLIN i386
>Description:
There seems to be a mbuf leakage which can be triggered by userland programs (i.e.: gtk-gnutella run by our young folk :-) in 4.3R.
The mbufs remain allocated AFTER THE PROGRAM TERMINATES!
After the program was running one gets outputs like the following:
[159]# netstat -m
1397/4224/6144 mbufs in use (current/peak/max):
1337 mbufs allocated to data
60 mbufs allocated to packet headers
69/806/1536 mbuf clusters in use (current/peak/max)
2668 Kbytes allocated to network (57% of mb_map in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
Normal operation looks like (we run a FreeBSD cluster and our machines are very stable otherwise...)
[20]# netstat -m
80/624/6144 mbufs in use (current/peak/max):
77 mbufs allocated to data
3 mbufs allocated to packet headers
64/184/1536 mbuf clusters in use (current/peak/max)
524 Kbytes allocated to network (11% of mb_map in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
If one lets run the program for a longer time, the following error
message is generated:
Jun 12 11:54:20 wigner /kernel: looutput: mbuf allocation failed
Letting it run even further, the system panics with a page fault
and dumps core. However the core dump gives no reference to mbufs
whatsoever (dumps etc. are available). Du to the broken '-M' of netstat I can give no mbuf output from the core...
In addition, even if the system did not yet panic and the program is terminated (with the above err msg occuring several times) the box may panic after a while. This case I observed once, and the mbuf usage had gone back to something like 3000/6144/6144 before the crash
>How-To-Repeat:
run gtk-gnutella for a while
>Fix:
unknown
>Release-Note:
>Audit-Trail:
>Unformatted:
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