Hello I had some report of random data corruption of people using cryptsetup with my sun4i-ss driver (via AF_ALG). Even if it is hard to hit, I could confirm it by continuously moving files on a LUKS encrypted FS and comparing hash of it before and after. The corruption is always when deciphering the end of 512bytes sector and always of a length multiple of 4.
The only way of removing this random corruption is to transform all spinlock_bh by spinlock_irqsave. In fact this problem is extremely similar to another bug that I have encountered (https://lkml.org/lkml/2015/10/11/47) The only difference is that I do not need to remove SG_MITER_ATOMIC for removing the issue. So my question remains nearly the same than on my first problem: Why disabling irq remove this data corruption ? Any help/suggestions will be really appreciated since I doesn't understand why this fix works. Regards LABBE Corentin
