From: David Miller <davem@xxxxxxxxxxxxx> Date: Wed, 31 May 2017 11:53:35 -0400 (EDT) > Can you try something like disabling cpu IRQs around the crc32c() function > in lib/libcrc32c.c? Something like: > > u32 retval; > > local_irq_disable(); > > shash->tfm = tfm; > shash->flags = 0; > *ctx = crc; > > err = crypto_shash_update(shash, address, length); > BUG_ON(err); > > retval = *ctx; > > local_irq_enable(); > > return retval; Actually you would need a spinlock, with IRQs disabled, to properly test this theory since the TFM is shared across the entire system. The really suspicious part of your test results is that the corrupted checksum always evaluates to zero.
