Re: [PATCH 03/18] fs_context: fix detecting full log buffer
Date
Mon, 09 Jul 2018 10:32:54 +0100
Eric Biggers <ebiggers3@gmail.com> wrote:
> When 'head' and 'tail' wrap around, 'log->head - log->tail' will be > something like '4 - 252 = -248', and comparing that directly to the > array size is wrong. Fix by casting to 'u8'.
I think a better fix is to use CIRC_CNT() or CIRC_SPACE().