io_uring: check that we have a file table when allocating update slots
If IORING_FILE_INDEX_ALLOC is set asking for an allocated slot, the helper doesn't check if we actually have a file table or not. The non alloc path does do that correctly, and returns -ENXIO if we haven't set one up. Do the same for the allocated path, avoiding a NULL pointer dereference when trying to find a free bit. Fixes: a7c41b46 ("io_uring: let IORING_OP_FILES_UPDATE support choosing fixed file slots") Signed-off-by: Jens Axboe <axboe@kernel.dk>
Showing
Please register or sign in to comment