Hi,
I'm running a netfilter/iptables firewall with Linux
2.4.18 + iptables 1.2.5 patch-o-matic (portions of
it).
I've been having problems with memory consumption.
Basically, as time goes by, 4kb chunks of memory are
consumed every few seconds. This continues until all
memory is consumed and nothing else can run, or the
system locks up and freezes.
I would like some hints on how to track down what is
causing this memory leak. I have is a customized
RedHat running on a CD and custom kernel running
netfilter.
Any help would be appreciated!
- D.
Here is some info:
1108 root@firewall:/#cat /proc/meminfo
total: used: free: shared: buffers:
cached:
Mem: 261722112 74821632 186900480 0 716800
35336192
Swap: 0 0 0
MemTotal: 255588 kB
MemFree: 182520 kB
MemShared: 0 kB
Buffers: 700 kB
Cached: 34508 kB
SwapCached: 0 kB
Active: 9128 kB
Inactive: 32612 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 255588 kB
LowFree: 182520 kB
SwapTotal: 0 kB
SwapFree: 0 kB
1109 root@firewall:/#lsmod
Module Size Used by Tainted: P
ppp_deflate 41696 2 (autoclean)
ppp_async 6624 1 (autoclean)
ppp_generic 17256 3 (autoclean)
[ppp_deflate ppp_async]
slhc 4592 1 (autoclean)
[ppp_generic]
3c509 8096 1 (autoclean)
tulip 39776 3
ipt_string 9760 4 (autoclean)
ipt_REJECT 2752 596 (autoclean)
ipt_state 608 50 (autoclean)
ipt_LOG 3392 5 (autoclean)
ipt_mac 640 5 (autoclean)
ip_nat_ftp 3200 0 (autoclean) (unused)
ip_conntrack_ftp 3584 0 (autoclean)
[ip_nat_ftp]
ip_nat_irc 2656 0 (autoclean) (unused)
ip_conntrack_irc 2592 0 (autoclean)
[ip_nat_irc]
iptable_nat 14868 3 (autoclean)
[ip_nat_ftp ip_nat_irc]
ip_conntrack 15660 4 (autoclean)
[ipt_state ip_nat_ftp ip_conntrack_ftp ip_nat_irc
ip_conntrack_irc iptable_nat]
iptable_mangle 2144 0 (autoclean) (unused)
iptable_filter 1760 1 (autoclean)
ip_tables 11680 10 [ipt_string
ipt_REJECT ipt_state ipt_LOG ipt_mac iptable_nat
iptable_mangle iptable_filter]
1111 root@firewall:/#wc -l /proc/net/ip_conntrack
5 /proc/net/ip_conntrack
1112 root@firewall:/#cat /proc/slabinfo
slabinfo - version: 1.1 (SMP)
kmem_cache 64 64 244 4 4 1
: 252 126
ip_fib_hash 113 113 32 1 1 1
: 252 126
ip_conntrack 92 154 352 13 14 1
: 124 62
ip_mrt_cache 0 0 96 0 0 1
: 252 126
tcp_tw_bucket 0 0 96 0 0 1
: 252 126
tcp_bind_bucket 113 113 32 1 1 1
: 252 126
tcp_open_request 59 59 64 1 1 1
: 252 126
inet_peer_cache 59 59 64 1 1 1
: 252 126
ip_dst_cache 120 120 192 6 6 1
: 252 126
arp_cache 30 30 128 1 1 1
: 252 126
uhci_urb_priv 56 56 68 1 1 1
: 252 126
blkdev_requests 280 280 96 7 7 1
: 252 126
devfsd_event 126 169 20 1 1 1
: 252 126
dnotify cache 0 0 20 0 0 1
: 252 126
file lock cache 42 42 92 1 1 1
: 252 126
fasync cache 0 0 16 0 0 1
: 252 126
uid_cache 113 113 32 1 1 1
: 252 126
skbuff_head_cache 336 336 160 14 14 1
: 252 126
sock 36 36 832 4 4 2
: 124 62
sigqueue 29 29 132 1 1 1
: 252 126
cdev_cache 228 354 64 4 6 1
: 252 126
bdev_cache 59 59 64 1 1 1
: 252 126
mnt_cache 59 59 64 1 1 1
: 252 126
inode_cache 41992 41992 480 5249 5249 1
: 124 62
dentry_cache 43110 43110 128 1437 1437 1
: 252 126
filp 360 360 128 12 12 1
: 252 126
names_cache 4 4 4096 4 4 1
: 60 30
buffer_head 8480 8480 96 212 212 1
: 252 126
mm_struct 48 48 160 2 2 1
: 252 126
vm_area_struct 634 760 96 19 19 1
: 252 126
fs_cache 59 59 64 1 1 1
: 252 126
files_cache 36 36 416 4 4 1
: 124 62
signal_act 33 33 1312 11 11 1
: 60 30
size-131072(DMA) 0 0 131072 0 0 32
: 0 0
size-131072 0 0 131072 0 0 32
: 0 0
size-65536(DMA) 0 0 65536 0 0 16
: 0 0
size-65536 1 1 65536 1 1 16
: 0 0
size-32768(DMA) 0 0 32768 0 0 8
: 0 0
size-32768 0 0 32768 0 0 8
: 0 0
size-16384(DMA) 0 0 16384 0 0 4
: 0 0
size-16384 0 0 16384 0 0 4
: 0 0
size-8192(DMA) 0 0 8192 0 0 2
: 0 0
size-8192 1 2 8192 1 2 2
: 0 0
size-4096(DMA) 0 0 4096 0 0 1
: 60 30
size-4096 12 12 4096 12 12 1
: 60 30
size-2048(DMA) 0 0 2048 0 0 1
: 60 30
size-2048 152 152 2048 76 76 1
: 60 30
size-1024(DMA) 0 0 1024 0 0 1
: 124 62
size-1024 108 108 1024 27 27 1
: 124 62
size-512(DMA) 0 0 512 0 0 1
: 124 62
size-512 40 40 512 5 5 1
: 124 62
size-256(DMA) 0 0 256 0 0 1
: 252 126
size-256 210 210 256 14 14 1
: 252 126
size-128(DMA) 30 30 128 1 1 1
: 252 126
size-128 1440 1440 128 48 48 1
: 252 126
size-64(DMA) 0 0 64 0 0 1
: 252 126
size-64 177 177 64 3 3 1
: 252 126
size-32(DMA) 113 113 32 1 1 1
: 252 126
size-32 904 904 32 8 8 1
: 252 126
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