From: Leon Romanovsky <leon@kernel.org>
To: Jason Gunthorpe <jgg@ziepe.ca>,
Junxian Huang <huangjunxian6@hisilicon.com>,
Chengchang Tang <tangchengchang@huawei.com>,
Edward Srouji <edwards@nvidia.com>
Cc: linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
Or Har-Toov <ohartoov@nvidia.com>
Subject: Re: [PATCH rdma-next] RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency
Date: Tue, 01 Sep 2026 10:04:08 -0400 [thread overview]
Message-ID: <178827144803.1380198.18045973124694867362.b4-ty@kernel.org> (raw)
In-Reply-To: <20260811-fix-mmap-lockdep-v1-1-1151b41063b4@nvidia.com>
On Tue, 11 Aug 2026 19:19:16 +0300, Edward Srouji wrote:
> Commit 51976c6cd786 ("RDMA/core: Provide rdma_user_mmap_disassociate()
> to disassociate mmap pages") introduced disassociation_lock to protect
> new mmap registrations against uverbs_user_mmap_disassociate(), but
> created an ABBA deadlock:
>
> Thread A (mmap / fork):
> mmap_lock -> disassociation_lock
>
> [...]
Applied, thanks!
[1/1] RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency
https://git.kernel.org/rdma/rdma/c/a44a3f175eaee7
Best regards,
--
Leon Romanovsky <leon@kernel.org>
prev parent reply other threads:[~2026-09-01 14:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-11 16:19 [PATCH rdma-next] RDMA/uverbs: Fix mmap_lock/disassociation_lock circular dependency Edward Srouji
2026-08-14 9:47 ` Junxian Huang
2026-09-01 14:04 ` Leon Romanovsky [this message]
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