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authorPavel Begunkov <asml.silence@gmail.com>2019-11-24 11:58:24 +0300
committerJens Axboe <axboe@kernel.dk>2019-11-25 19:56:11 -0700
commit311ae9e159d81a1ec1cf645daf40b39ae5a0bd84 (patch)
tree08f3dbc913f0459274073109bd6c47d83cdac82b /fs/io-wq.c
parentf8e85cf255ad57d65eeb9a9d0e59e3dec55bdd9e (diff)
io_uring: fix dead-hung for non-iter fixed rw
Read/write requests to devices without implemented read/write_iter using fixed buffers can cause general protection fault, which totally hangs a machine. io_import_fixed() initialises iov_iter with bvec, but loop_rw_iter() accesses it as iovec, dereferencing random address. kmap() page by page in this case Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io-wq.c')
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