From: patchwork-bot+netdevbpf@kernel.org
To: Hidayathulla Khan I <hidayath@linux.ibm.com>
Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, wintera@linux.ibm.com,
alibuda@linux.alibaba.com, dust.li@linux.alibaba.com,
sidraya@linux.ibm.com, wenjia@linux.ibm.com,
mjambigi@linux.ibm.com, tonylu@linux.alibaba.com,
guwen@linux.alibaba.com, horms@kernel.org, hca@linux.ibm.com,
gor@linux.ibm.com, agordeev@linux.ibm.com,
borntraeger@linux.ibm.com, svens@linux.ibm.com,
pasic@linux.ibm.com, gbayer@linux.ibm.com, andrew+netdev@lunn.ch,
netdev@vger.kernel.org, linux-s390@vger.kernel.org,
linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net] dibs: fix use-after-free of dmb_node in loopback attach/detach/unregister
Date: Thu, 30 Jul 2026 00:00:20 +0000 [thread overview]
Message-ID: <178536962038.3288516.6334881564101626025.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260727093530.968834-1-hidayath@linux.ibm.com>
Hello:
This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:
On Mon, 27 Jul 2026 11:35:30 +0200 you wrote:
> dibs_lo_attach_dmb(), dibs_lo_detach_dmb() and dibs_lo_unregister_dmb()
> look up the dmb_node under dmb_ht_lock, drop the lock and only then
> operate on the node's refcount. Nothing keeps the node alive across
> that window: __dibs_lo_unregister_dmb() removes the node from the hash
> table under the write lock and immediately frees it.
>
> A concurrent final put can therefore free the node between the lookup
> and the refcount operation:
>
> [...]
Here is the summary with links:
- [net] dibs: fix use-after-free of dmb_node in loopback attach/detach/unregister
https://git.kernel.org/netdev/net/c/a10ea943356b
You are awesome, thank you!
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prev parent reply other threads:[~2026-07-30 0:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-27 9:35 [PATCH net] dibs: fix use-after-free of dmb_node in loopback attach/detach/unregister Hidayath Khan
2026-07-29 12:25 ` Alexandra Winter
2026-07-29 12:50 ` Hidayathulla Khan I
2026-07-30 0:00 ` patchwork-bot+netdevbpf [this message]
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