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(parent: f55adad) | patch
aio: fix spectre gadget in lookup_ioctx
authorJeff Moyer <jmoyer@redhat.com>
Tue, 11 Dec 2018 17:37:49 +0000 (12:37 -0500)
committerJens Axboe <axboe@kernel.dk>
Tue, 11 Dec 2018 18:45:50 +0000 (11:45 -0700)
commita538e3ff9dabcdf6c3f477a373c629213d1c3066
tree8f94a879f2bd8b990032bead3a410b1bf000558btree | snapshot
parentf55adad601c6a97c8c9628195453e0fb23b4a0aecommit | diff
aio: fix spectre gadget in lookup_ioctx

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: Matthew Wilcox <willy@infradead.org>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
fs/aio.c diff | blob | history
Domain: System / Kernel;