From: Pavel Begunkov <asml.silence@gmail.com>
Date: Tue, 11 Apr 2023 11:06:04 +0000 (+0100)
Subject: io_uring/rsrc: add lockdep checks
X-Git-Tag: for-6.4/io_uring-2023-04-21~25
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=786788a8cfe03056e9c7b1c6e418c1db92a0ce80;p=linux-block.git

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 603a783a0383..24e4e2109549 100644
--- 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);