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[204.195.96.226]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ad52d43840esm1724960466b.87.2025.05.26.14.14.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 May 2025 14:14:05 -0700 (PDT) Date: Mon, 26 May 2025 14:14:00 -0700 From: Stephen Hemminger To: Gongming Chen Cc: maxime.coquelin@redhat.com, chenbox@nvidia.com, dev@dpdk.org, Gongming Chen , stable@dpdk.org Subject: Re: [PATCH v4] vhost: fix crash caused by accessing a freed vsocket Message-ID: <20250526141400.552bd764@hermes.local> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org On Mon, 8 Jul 2024 12:41:03 +0800 Gongming Chen wrote: > diff --git a/lib/vhost/vhost_thread.c b/lib/vhost/vhost_thread.c > new file mode 100644 > index 0000000000..f3ff182976 > --- /dev/null > +++ b/lib/vhost/vhost_thread.c > @@ -0,0 +1,33 @@ > +#include > + > +#include "vhost_thread.h" > + > +static rte_rwlock_t vhost_thread_lock = RTE_RWLOCK_INITIALIZER; > + > +void > +vhost_thread_read_lock(void) > + __rte_no_thread_safety_analysis > +{ > + rte_rwlock_read_lock(&vhost_thread_lock); > +} > + > +void > +vhost_thread_read_unlock(void) > + __rte_no_thread_safety_analysis > +{ > + rte_rwlock_read_unlock(&vhost_thread_lock); > +} > + > +void > +vhost_thread_write_lock(void) > + __rte_no_thread_safety_analysis > +{ > + rte_rwlock_write_lock(&vhost_thread_lock); > +} > + > +void > +vhost_thread_write_unlock(void) > + __rte_no_thread_safety_analysis > +{ > + rte_rwlock_write_unlock(&vhost_thread_lock); > +} Looking at the back catalog and spotted this. What is the reason for moving all the vhost_thread locks into a file? Also turning off thread safety is a bad idea. And mixing DPDK locks with pthread mutex is not wise either. This is not going to be critical path so why not use a pthread_mutex?