• Horia Geantă's avatar
    crypto: caam - fix signals handling · 7459e1d2
    Horia Geantă authored
    Driver does not properly handle the case when signals interrupt
    wait_for_completion_interruptible():
    -it does not check for return value
    -completion structure is allocated on stack; in case a signal interrupts
    the sleep, it will go out of scope, causing the worker thread
    (caam_jr_dequeue) to fail when it accesses it
    
    wait_for_completion_interruptible() is replaced with uninterruptable
    wait_for_completion().
    We choose to block all signals while waiting for I/O (device executing
    the split key generation job descriptor) since the alternative - in
    order to have a deterministic device state - would be to flush the job
    ring (aborting *all* in-progress jobs).
    
    Cc: <stable@vger.kernel.org>
    Fixes: 045e3678 ("crypto: caam - ahash hmac support")
    Fixes: 4c1ec1f9 ("crypto: caam - refactor key_gen, sg")
    Signed-off-by: default avatarHoria Geantă <horia.geanta@nxp.com>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
    7459e1d2
caamhash.c 52.4 KB