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libata: add SG safety checks in SFF pio transfers
authorJens Axboe <axboe@kernel.dk>
Wed, 7 Aug 2019 18:23:57 +0000 (12:23 -0600)
committerJens Axboe <axboe@kernel.dk>
Wed, 7 Aug 2019 18:23:57 +0000 (12:23 -0600)
commitbda291a6e134fe1a12999f857a9e66ed639e8329
tree35e8ce8c5b731a922a53b6d45cc48804f0e5af11tree | snapshot
parenta6fe85c8e9aa560a48229e01deeea9311ca24339commit | diff
libata: add SG safety checks in SFF pio transfers

Abort processing of a command if we run out of mapped data in the
SG list. This should never happen, but a previous bug caused it to
be possible. Play it safe and attempt to abort nicely if we don't
have more SG segments left.

Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
drivers/ata/libata-sff.c diff | blob | history
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