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Old 12-15-2004, 10:29 PM   #1
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Registered: Mar 2004
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help ! unresolved symbol crypto_alloc_tfm !

Hi all
I'm using Redhat9 , My kernel version is 2.4.20-8
my atheros driver used madwifi which download from
I tried to install the driver ,
insmod wlan_auth.o

I received the following error messages:
# insmod wlan_auth.o
Using wlan_auth.o
insmod: unresolved symbol crypto_alloc_tfm
insmod: unresolved symbol crypto_free_tfm
insmod: unresolved symbol crypto_hmac

Can anyone help me?
Thank you very much
Old 12-16-2004, 06:39 AM   #2
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Registered: Oct 2004
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tcrypt missing perhaps?

Try this first:
modprobe tcrypt
and then do
modprobe wlan_auth
The tcrypt kernel module provides the symbols you require (I think -- at least that is what a "grep crypt_alloc_tfm" in the /lib/modules directory came up with)

If you still have symbols missing, try greping for the in the /lib/modules/[kernel version]/kernel/crypto directory. If you find them this way , you will also see which module to load.
Old 12-16-2004, 09:52 PM   #3
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Registered: Mar 2004
Posts: 16

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thank you much first .

according to your said , I did the following :
"grep crypt_alloc_tfm" in the /lib/modules directory

but there were not any results .
I googled "crypt_alloc_tfm" and found that this symbols was defined in the Kernel 2.4.26 least , so was there any patch for the kernel 2.4.20 ?

thank you again .


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