From: "Gustavo A. R. Silva" <gust...@embeddedor.com> Date: Thu, 3 May 2018 13:17:12 -0500
> pool can be indirectly controlled by user-space, hence leading to > a potential exploitation of the Spectre variant 1 vulnerability. > > This issue was detected with the help of Smatch: > > drivers/atm/zatm.c:1462 zatm_ioctl() warn: potential spectre issue > 'zatm_dev->pool_info' (local cap) > > Fix this by sanitizing pool before using it to index > zatm_dev->pool_info > > Notice that given that speculation windows are large, the policy is > to kill the speculation on the first load and not worry if it can be > completed with a dependent load/store [1]. > > [1] https://marc.info/?l=linux-kernel&m=152449131114778&w=2 > > Cc: sta...@vger.kernel.org > Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com> Applied and queued up for -stable.
