On Wed, 20 Mar 2019 22:15:24 +0100, Gustavo A. R. Silva wrote: > > info->stream is 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: > > sound/core/rawmidi.c:604 __snd_rawmidi_info_select() warn: potential spectre > issue 'rmidi->streams' [r] (local cap) > > Fix this by sanitizing info->stream before using it to index > rmidi->streams. > > 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://lore.kernel.org/lkml/[email protected]/ > > Cc: [email protected] > Signed-off-by: Gustavo A. R. Silva <[email protected]>
Applied, thanks. Takashi
