io_uring: Fix uninitialized variable up.resv

The variable up.resv is not initialized and is being checking for a
non-zero value in the call to _io_register_rsrc_update. Fix this by
explicitly setting the variable to 0.

Addresses-Coverity: ("Uninitialized scalar variable)"
Fixes: c3bdad027183 ("io_uring: add generic rsrc update with tags")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210426094735.8320-1-colin.king@canonical.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index b65a253..5775204 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5842,6 +5842,7 @@ static int io_files_update(struct io_kiocb *req, unsigned int issue_flags)
        up.data = req->rsrc_update.arg;
        up.nr = 0;
        up.tags = 0;
+       up.resv = 0;
 
        mutex_lock(&ctx->uring_lock);
        ret = __io_register_rsrc_update(ctx, IORING_RSRC_FILE,