kernel/3116: mbuf leak

From: Tomas Svensson <ts(at)unix1.net>
Date: Sun Feb 23 2003 - 06:04:00 EST

>Number: 3116
>Category: kernel
>Synopsis: mbuf leak
>Confidential: no
>Severity: serious
>Priority: high
net
>Environment:

	System      : OpenBSD 3.2
	Architecture: OpenBSD.i386
	Machine     : i386

>Description:

The system is consistently leaking mbufs. Applying the icmp mbuf leak fix didn't help (complete system and kernel built from OPENBSD_3_2 a week ago). This is after less than a weeks uptime:

1026 mbufs in use:

	65 mbufs allocated to data
	14 mbufs allocated to packet headers
	947 mbufs allocated to socket names and addresses

64/156 mapped pages in use
844 Kbytes allocated to network (45% in use) 0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines

netstat -na shows only a few connections and so does pfctl -ss (NAT for a few machines). Killing all processes except for init and sshd doesn't free anything.

dmesg:

OpenBSD 3.2-stable (GENERIC) #0: Sun Feb 16 22:07:04 CET 2003

    ts@simba.unix1.net:/usr/src/sys/arch/i386/compile/GENERIC

cpu0: F00F bug workaround installed
cpu0: Intel Pentium (P54C) ("GenuineIntel" 586-class) 133 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,MCE,CX8

real mem = 49917952 (48748K)
avail mem = 40730624 (39776K)
using 634 buffers containing 2596864 bytes (2536K) of memory mainbus0 (root)
bios0 at mainbus0: AT/286+(00) BIOS, date 11/10/95, BIOS32 rev. 0 @ 0xfd8a0 pcibios0 at bios0: rev. 2.1 @ 0xf0000/0x10000

pcibios0: PCI BIOS has 5 Interrupt Routing table entries
pcibios0: PCI Interrupt Router at 000:07:0 ("Intel 82371FB PCI-ISA" rev 0x00)
pcibios0: PCI bus #0 is the last bus

WARNING: can't reserve area for I/O APIC. WARNING: can't reserve area for Local APIC. bios0: ROM list: 0xc0000/0x8000 0xed000/0x1000 pci0 at mainbus0 bus 0: configuration mode 1 (bios)

pchb0 at pci0 dev 0 function 0 "Intel 82437FX" rev 0x01
pcib0 at pci0 dev 7 function 0 "Intel 82371FB PCI-ISA" rev 0x02
vga1 at pci0 dev 15 function 0 "ATI Mach64 VT" rev 0x08

wsdisplay0 at vga1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) fxp0 at pci0 dev 16 function 0 "Intel 82557" rev 0x01: irq 11, address 00:a0:c9:29:de:87 nsphy0 at fxp0 phy 1: DP83840 10/100 media interface, rev. 0 isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0 wdc0 at isa0 port 0x1f0/8 irq 14
wd0 at wdc0 channel 0 drive 0: <IBM-DTLA-307030> wd0: 16-sector PIO, LBA, 29314MB, 16383 cyl, 16 head, 63 sec, 60036480 sectors wd0(wdc0:0:0): using BIOS timings
sb0 at isa0 port 0x220/24 irq 5 drq 1: dsp v4.13 midi0 at sb0: <SB MIDI UART>
audio0 at sb0
opl0 at sb0: model OPL3
midi1 at opl0: <SB Yamaha OPL3>
pcppi0 at isa0 port 0x61
midi2 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: using exception 16 pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec biomask 4040 netmask 4840 ttymask 48c2
pctr: 586-class performance counters and user-level cycle counter enabled dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302

>How-To-Repeat:

>Release-Note:
Received on Wed Feb 26 18:33:49 2003