On Thu, Nov 12, 2009 at 4:49 PM, Luis R. Rodriguez
<lrodriguez@xxxxxxxxxxx> wrote:
> On Thu, Nov 12, 2009 at 7:44 AM, Luis R. Rodriguez
> <lrodriguez@xxxxxxxxxxx> wrote:
>> On Thu, Nov 12, 2009 at 06:18:46AM -0800, Matteo Croce wrote:
>>> On Thu, Nov 12, 2009 at 12:31 PM, Lorenzo Bianconi
>>> <lorenzo.bianconi83@xxxxxxxxx> wrote:
>>> > Hi all
>>> >
>>> > I am playing with ath9k/mac80211 in monitor mode and I suspect there
>>> > is a memory leak.
>>> > The leak happens when injecting in monitor mode when the destination
>>> > MAC address is unicast.
>>> > In fact there is no leak sending broadcast packet.
>>> > I wrote this minimal test case module which triggers the leak.
>>>
>>> I can reproduce it with ath5k but not with madwifi, so the leak could
>>> be in mac80211
>>
>> Can you please resend the thread to linux-wireless for wider review, with
>> the code snippet and all?
I have compiled a 2.6.31 x86 kernel with kmemleak, and when injecting
the memory goes rapidly down:
# while sleep 10; do free |grep Mem; done
Mem: 127112 41780 85332 0 224
Mem: 127112 42580 84532 0 224
Mem: 127112 43360 83752 0 224
Mem: 127112 44160 82952 0 224
Mem: 127112 44960 82152 0 224
Mem: 127112 48140 78972 0 224
just to be sure that any program is stoling RAM:
# ps
PID USER VSZ STAT COMMAND
1 root 932 S init
2 root 0 SW< [kthreadd]
3 root 0 SW< [ksoftirqd/0]
4 root 0 SW< [watchdog/0]
5 root 0 SW< [events/0]
6 root 0 SW< [khelper]
9 root 0 SW< [async/mgr]
61 root 0 SW< [kblockd/0]
66 root 0 SW< [ata/0]
67 root 0 SW< [ata_aux]
107 root 0 SW [khungtaskd]
108 root 0 SW [pdflush]
109 root 0 SW [pdflush]
110 root 0 SW< [kswapd0]
111 root 0 SW< [aio/0]
112 root 0 SW< [crypto/0]
194 root 0 SW< [scsi_eh_0]
197 root 0 SW< [scsi_eh_1]
213 root 0 SWN [kmemleak]
369 root 936 R /bin/ash --login
505 root 0 SW< [phy0]
4369 root 932 S init
4371 root 924 R ps
This time I'm using ath5k with an AR5212 card instead of ath9k, so the
leak definitely is in mac80211
This is what kmemleak reports:
# echo scan >/sys/kernel/debug/kmemleak ; cat
/sys/kernel/debug/kmemleak
kmemleak: 197 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
unreferenced object 0xc5cfea80 (size 192):
comm "softirq", pid 0, jiffies 14191
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d1a400 (size 1024):
comm "softirq", pid 0, jiffies 14191
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc7ac9e40 (size 192):
comm "softirq", pid 0, jiffies 14192
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6a05000 (size 1024):
comm "softirq", pid 0, jiffies 14192
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc7ac9d80 (size 192):
comm "softirq", pid 0, jiffies 14193
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6a04800 (size 1024):
comm "softirq", pid 0, jiffies 14193
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc7ac9c00 (size 192):
comm "softirq", pid 0, jiffies 14194
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc707b800 (size 1024):
comm "softirq", pid 0, jiffies 14194
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc7ac9f00 (size 192):
comm "softirq", pid 0, jiffies 14195
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6a05400 (size 1024):
comm "softirq", pid 0, jiffies 14195
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df480 (size 192):
comm "softirq", pid 0, jiffies 14196
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d1c000 (size 1024):
comm "softirq", pid 0, jiffies 14196
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df540 (size 192):
comm "softirq", pid 0, jiffies 14197
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d1c800 (size 1024):
comm "softirq", pid 0, jiffies 14197
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df3c0 (size 192):
comm "softirq", pid 0, jiffies 14198
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d1cc00 (size 1024):
comm "softirq", pid 0, jiffies 14198
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df300 (size 192):
comm "softirq", pid 0, jiffies 14199
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d1d000 (size 1024):
comm "softirq", pid 0, jiffies 14199
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df600 (size 192):
comm "softirq", pid 0, jiffies 14200
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d1d400 (size 1024):
comm "softirq", pid 0, jiffies 14200
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df180 (size 192):
comm "softirq", pid 0, jiffies 14201
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d1d800 (size 1024):
comm "softirq", pid 0, jiffies 14201
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df6c0 (size 192):
comm "softirq", pid 0, jiffies 14202
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d1dc00 (size 1024):
comm "softirq", pid 0, jiffies 14202
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df780 (size 192):
comm "softirq", pid 0, jiffies 14203
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6a04400 (size 1024):
comm "softirq", pid 0, jiffies 14203
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df0c0 (size 192):
comm "softirq", pid 0, jiffies 14204
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6a05800 (size 1024):
comm "softirq", pid 0, jiffies 14204
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df000 (size 192):
comm "softirq", pid 0, jiffies 14205
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6cb7800 (size 1024):
comm "softirq", pid 0, jiffies 14205
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc69df840 (size 192):
comm "softirq", pid 0, jiffies 14206
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d1c400 (size 1024):
comm "softirq", pid 0, jiffies 14206
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d000c0 (size 192):
comm "softirq", pid 0, jiffies 14207
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6cb9800 (size 1024):
comm "softirq", pid 0, jiffies 14256
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d14780 (size 192):
comm "softirq", pid 0, jiffies 14257
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d24000 (size 1024):
comm "softirq", pid 0, jiffies 14257
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d14840 (size 192):
comm "softirq", pid 0, jiffies 14258
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d24800 (size 1024):
comm "softirq", pid 0, jiffies 14258
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d14900 (size 192):
comm "softirq", pid 0, jiffies 14259
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d24c00 (size 1024):
comm "softirq", pid 0, jiffies 14259
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d149c0 (size 192):
comm "softirq", pid 0, jiffies 14260
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d25000 (size 1024):
comm "softirq", pid 0, jiffies 14260
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d14a80 (size 192):
comm "softirq", pid 0, jiffies 14261
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d25400 (size 1024):
comm "softirq", pid 0, jiffies 14261
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d14b40 (size 192):
comm "softirq", pid 0, jiffies 14262
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d25800 (size 1024):
comm "softirq", pid 0, jiffies 14262
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d14c00 (size 192):
comm "softirq", pid 0, jiffies 14263
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d25c00 (size 1024):
comm "softirq", pid 0, jiffies 14263
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d14cc0 (size 192):
comm "softirq", pid 0, jiffies 14264
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6a0fc00 (size 1024):
comm "softirq", pid 0, jiffies 14264
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d14d80 (size 192):
comm "softirq", pid 0, jiffies 14265
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6a0f400 (size 1024):
comm "softirq", pid 0, jiffies 14265
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d14e40 (size 192):
comm "softirq", pid 0, jiffies 14266
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc7273800 (size 1024):
comm "softirq", pid 0, jiffies 14266
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d14f00 (size 192):
comm "softirq", pid 0, jiffies 14267
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc7273c00 (size 1024):
comm "softirq", pid 0, jiffies 14267
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6ca56c0 (size 192):
comm "softirq", pid 0, jiffies 14268
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d24400 (size 1024):
comm "softirq", pid 0, jiffies 14268
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6ca5540 (size 192):
comm "softirq", pid 0, jiffies 14269
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6cb8400 (size 1024):
comm "softirq", pid 0, jiffies 14269
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6ca50c0 (size 192):
comm "softirq", pid 0, jiffies 14271
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc7272c00 (size 1024):
comm "softirq", pid 0, jiffies 14271
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6ca5480 (size 192):
comm "softirq", pid 0, jiffies 14272
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d26000 (size 1024):
comm "softirq", pid 0, jiffies 14272
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6ca5180 (size 192):
comm "softirq", pid 0, jiffies 14273
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5d26800 (size 1024):
comm "softirq", pid 0, jiffies 14273
backtrace:
[<ffffffff>] 0xffffffff
and again:
# echo scan >/sys/kernel/debug/kmemleak ; cat /sys/kernel/debug/km
emleak
kmemleak: 20 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
unreferenced object 0xc586b540 (size 192):
comm "softirq", pid 0, jiffies 18612
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc70c0800 (size 1024):
comm "softirq", pid 0, jiffies 18612
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc586b600 (size 192):
comm "softirq", pid 0, jiffies 18613
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6d81800 (size 1024):
comm "softirq", pid 0, jiffies 18613
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc586b6c0 (size 192):
comm "softirq", pid 0, jiffies 18614
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6b96800 (size 1024):
comm "softirq", pid 0, jiffies 18614
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc586b840 (size 192):
comm "softirq", pid 0, jiffies 18615
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6b96000 (size 1024):
comm "softirq", pid 0, jiffies 18615
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc586b900 (size 192):
comm "softirq", pid 0, jiffies 18616
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6b96c00 (size 1024):
comm "softirq", pid 0, jiffies 18616
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc586b9c0 (size 192):
comm "softirq", pid 0, jiffies 18617
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc5886400 (size 1024):
comm "softirq", pid 0, jiffies 18617
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc586ba80 (size 192):
comm "softirq", pid 0, jiffies 18618
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6b97400 (size 1024):
comm "softirq", pid 0, jiffies 18618
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc586bb40 (size 192):
comm "softirq", pid 0, jiffies 18619
backtrace:
[<ffffffff>] 0xffffffff
unreferenced object 0xc6baa400 (size 1024):
comm "softirq", pid 0, jiffies 18619
backtrace:
[<ffffffff>] 0xffffffff
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