• Joy Latten's avatar
    [CRYPTO] xcbc: Fix crash when ipsec uses xcbc-mac with big data chunk · 1edcf2e1
    Joy Latten authored
    The kernel crashes when ipsec passes a udp packet of about 14XX bytes
    of data to aes-xcbc-mac.
    It seems the first xxxx bytes of the data are in first sg entry,
    and remaining xx bytes are in next sg entry. But we don't 
    check next sg entry to see if we need to go look the page up.
    I noticed in hmac.c, we do a scatterwalk_sg_next(), to do this check
    and possible lookup, thus xcbc.c needs to use this routine too.
    A 15-hour run of an ipsec stress test sending streams of tcp and
    udp packets of various sizes,  using this patch and 
    aes-xcbc-mac completed successfully, so hopefully this fixes the
    Signed-off-by: default avatarJoy Latten <latten@austin.ibm.com>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
xcbc.c 9.04 KB