io_uring/rsrc: add lockdep checks

Add a lockdep chek to make sure that file and buffer updates hold
->uring_lock.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/961bbe6e433ec9bc0375127f23468b37b729df99.1681210788.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 603a783..24e4e21 100644 (file)
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -534,6 +534,8 @@ static int __io_register_rsrc_update(struct io_ring_ctx *ctx, unsigned type,
        __u32 tmp;
        int err;
 
+       lockdep_assert_held(&ctx->uring_lock);
+
        if (check_add_overflow(up->offset, nr_args, &tmp))
                return -EOVERFLOW;
        err = io_rsrc_node_switch_start(ctx);