Hello

i'm trying to use the authenc module and i wrote a small kernel module that 
simply encrypts/decrypts a fixed data using the hmac(sha1) as authentication 
algorithm and cbc(aes) as encryption algorithm. 
The used platform is a KVM quest with Fedora 12 i686 and the latest kernel 
2.6.33.
I have taken the code from the testmgr and from net/ipv4/esp4.c.
But, when testing the code, attached in this mail, the crypto_aead_decrypt() 
function always replies -EBADMSG. 
I tried the same code in a 64-bit machine (user mode kernel and Fedora 12) and 
the decryption was successful. I noted, when comparing the auth portion in 
both systems, that this computed during the encryption from the 32bit KVM 
guest, was different and with no fixed value. I investigated in the code of 
authenc and i recorded some partial result of the encryption operation. That 
is the log:   

--------- testing authenc: encrypt ---------------
assoc: 495C501F1D94CC81BAB7B603AFA5C1A1D85C4268E06CDA8905AC56AC1B2AD386
alg: No test for authenc(hmac(sha1),cbc(aes)) (authenc(hmac(sha1-
generic),cbc(aes-asm)))
Setting ahash key: 313233343536373839303132
Setting blk key: 31323334353637383930313233343536
crypto_authenc_encrypt: ivsize 16 iv: 01010101010101010101010101010101
crypto_authenc_genicv: dump vdst: 
CFE3A997243F38B0D6A89DCAB5126DC93952E493E72EA590CC8D186A4E1654860000000000000000000000000000000000000000
crypto_authenc_genicv ivsize 16,dst offset 3392 iv 
01010101010101010101010101010101
crypto_authenc_genicv: iv after sg_init_table 00000000000000000101010101010101
crypto_authenc_genicv: vdst == iv + ivsize? 0
crypto_authenc_genicv: scatterlist dst 0 before fn assignement (line 355): 
3242265088, 388, 32, dump: 
495C501F1D94CC81BAB7B603AFA5C1A1D85C4268E06CDA8905AC56AC1B2AD386
crypto_authenc_genicv: scatterlist dst 1 before fn assignement (line 355): 
3727819872, 0, 0, dump: 
crypto_authenc_genicv: scatterlist dst 2 before fn assignement (line 355): 
3241960448, 1152, 16, dump: 00000000000000000101010101010101
crypto_authenc_genicv: scatterlist dst 3 before fn assignement (line 355): 
3747577608, 0, 0, dump: 
crypto_authenc_genicv: scatterlist dst 0 after fn assignement (line 355): 
3242265088, 388, 32, dump: 
495C501F1D94CC81BAB7B603AFA5C1A1D85C4268E06CDA8905AC56AC1B2AD386
crypto_authenc_genicv: scatterlist dst 1 after fn assignement (line 355): 
3727819872, 0, 0, dump: 
crypto_authenc_genicv: scatterlist dst 2 after fn assignement (line 355): 
3241960448, 1152, 16, dump: 0000000000000000C01886E0201986E0
crypto_authenc_genicv: scatterlist dst 2 after fn assignement (line 355):: 
3747577608, 0, 0, dump: 
--------------------------------------------------

Just for test, i tried to add a 16bit long offset when defining the memory 
address for the "iv" in the function  crypto_authenc_encrypt() for the 32-bit 
kernel, and everything works fine.
I don't know if i made a mistake in the code that causes this misbehaviour in 
the authenc module or if it is a bug.

Thanks in advance for the reply.