Is there any ideas on this bug?
Ping for review, please.
Yunjian
> -----Original Message-----
> From: wangyunjian
> Sent: Saturday, May 23, 2020 6:52 PM
> To: dev@dpdk.org
> Cc: Lilijun (Jerry) <jerry.lili...@huawei.com>; xudingke
> <xudin...@huawei.com>; wangyunjian <wangyunj...@huawei.com>;
> sta...@dpdk.org
> Subject: [dpdk-dev] [PATCH] eal: fix memory leak in uevent parse and process
>
> From: Yunjian Wang <wangyunj...@huawei.com>
>
> When the memory for uevent.devname is allocated in dev_uev_parse(). It is not
> freed when parse the subsystem layer fails in dev_uev_parse().
> And Before return, it is also not freed in dev_uev_handler(). These cause a
> memory leak.
>
> Fixes: 0d0f478d0483 ("eal/linux: add uevent parse and process")
> Cc: sta...@dpdk.org
>
> Signed-off-by: Yunjian Wang <wangyunj...@huawei.com>
> ---
> lib/librte_eal/linux/eal_dev.c | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/lib/librte_eal/linux/eal_dev.c b/lib/librte_eal/linux/eal_dev.c
> index
> 83c9cd660..3a2bf8514 100644
> --- a/lib/librte_eal/linux/eal_dev.c
> +++ b/lib/librte_eal/linux/eal_dev.c
> @@ -189,7 +189,7 @@ dev_uev_parse(const char *buf, struct rte_dev_event
> *event, int length)
> else if (!strncmp(subsystem, "vfio", 4))
> event->subsystem = EAL_DEV_EVENT_SUBSYSTEM_VFIO;
> else
> - return -1;
> + goto out;
>
> /* parse the action type */
> if (!strncmp(action, "add", 3))
> @@ -197,8 +197,12 @@ dev_uev_parse(const char *buf, struct rte_dev_event
> *event, int length)
> else if (!strncmp(action, "remove", 6))
> event->type = RTE_DEV_EVENT_REMOVE;
> else
> - return -1;
> + goto out;
> return 0;
> +out:
> + if (event->devname)
> + free(event->devname);
> + return -1;
> }
>
> static void
> @@ -277,12 +281,14 @@ dev_uev_handler(__rte_unused void *param)
> rte_spinlock_unlock(&failure_handle_lock);
> }
> rte_dev_event_callback_process(uevent.devname, uevent.type);
> + free(uevent.devname);
> }
>
> return;
>
> failure_handle_err:
> rte_spinlock_unlock(&failure_handle_lock);
> + free(uevent.devname);
> }
>
> int
> --
> 2.23.0
>
