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Commit a6136922 authored by Jeff Moyer's avatar Jeff Moyer Committed by Greg Kroah-Hartman
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aio: fix spectre gadget in lookup_ioctx



commit a538e3ff upstream.

Matthew pointed out that the ioctx_table is susceptible to spectre v1,
because the index can be controlled by an attacker.  The below patch
should mitigate the attack for all of the aio system calls.

Cc: stable@vger.kernel.org
Reported-by: default avatarMatthew Wilcox <willy@infradead.org>
Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarJeff Moyer <jmoyer@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4c74d5f1
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