Messages in this thread | | | Date | Fri, 04 May 2018 12:54:04 -0400 (EDT) | Subject | Re: [PATCH] atm: zatm: Fix potential Spectre v1 | From | David Miller <> |
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From: "Gustavo A. R. Silva" <gustavo@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: stable@vger.kernel.org > Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Applied and queued up for -stable.
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