From: Huisong Li <lihuisong@huawei.com>
To: <dev@dpdk.org>
Cc: <thomas@monjalon.net>, <ferruh.yigit@xilinx.com>,
<andrew.rybchenko@oktetlabs.ru>, <huangdaode@huawei.com>,
<lihuisong@huawei.com>
Subject: [PATCH 2/6] bus/vdev: fix a segfault when call callback
Date: Thu, 25 Aug 2022 10:57:15 +0800 [thread overview]
Message-ID: <20220825025719.14281-3-lihuisong@huawei.com> (raw)
In-Reply-To: <20220825025719.14281-1-lihuisong@huawei.com>
After the driver probe is executed, the callback in application will be
called. And this callback may call some APIs which access the driver in
struct rte_vdev_driver by the device::driver pointer to get some driver
information. If the rte_vdev_device::device::driver pointer isn't pointed
to the rte_vdev_driver::driver before executing driver probe, a segfault
will occur.
Fixes: e9d159c3d534 ("eal: allow probing a device again")
Cc: stable@dpdk.org
Signed-off-by: Huisong Li <lihuisong@huawei.com>
---
drivers/bus/vdev/vdev.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/bus/vdev/vdev.c b/drivers/bus/vdev/vdev.c
index a8d8b2327e..dea3937607 100644
--- a/drivers/bus/vdev/vdev.c
+++ b/drivers/bus/vdev/vdev.c
@@ -209,9 +209,16 @@ vdev_probe_all_drivers(struct rte_vdev_device *dev)
return -1;
}
+ /*
+ * After the driver probe is executed, the callback in application will
+ * be called. The callback in application may call some APIs which use
+ * dev->device.driver to get some driver information. If the driver
+ * pointer isn't pointed to driver->driver here, a segfault will occur.
+ */
+ dev->device.driver = &driver->driver;
ret = driver->probe(dev);
- if (ret == 0)
- dev->device.driver = &driver->driver;
+ if (ret != 0)
+ dev->device.driver = NULL;
return ret;
}
--
2.22.0
next prev parent reply other threads:[~2022-08-25 2:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-25 2:57 [PATCH 0/6] app/testpmd: support attach and detach port for MP Huisong Li
2022-08-25 2:57 ` [PATCH 1/6] bus/pci: fix a segfault when call callback Huisong Li
2022-08-25 2:57 ` Huisong Li [this message]
2022-08-25 2:57 ` [PATCH 3/6] ethdev: fix push new event Huisong Li
2022-08-25 2:57 ` [PATCH 4/6] app/testpmd: check the validity of the port Huisong Li
2022-08-25 2:57 ` [PATCH 5/6] app/testpmd: support attach and detach port for MP Huisong Li
2022-08-25 2:57 ` [PATCH 6/6] app/testpmd: stop packet forwarding in new and destroy event Huisong Li
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