io_uring: protect fixed file indexing with array_index_nospec()

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We index the file tables with a user given value. After we check
it's within our limits, use array_index_nospec() to prevent any
spectre attacks here.

Suggested-by: Jann Horn <jannh@google.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Jens Axboe 2019-10-26 07:22:55 -06:00

parent 17f2fe35d0

commit b7620121dc

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fs/io_uring.c

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