BMC/Intel-BMC/linux.git/net/mctp/test/utils.c, branch dev-5.15-intel

mctp: make __mctp_dev_get() take a refcount hold

2022-03-18T00:38:51+00:00

Previously there was a race that could allow the mctp_dev refcount to hit zero: rcu_read_lock(); mdev = __mctp_dev_get(dev); // mctp_unregister() happens here, mdev->refs hits zero mctp_dev_hold(dev); rcu_read_unlock(); Now we make __mctp_dev_get() take the hold itself. It is safe to test against the zero refcount because __mctp_dev_get() is called holding rcu_read_lock and mctp_dev uses kfree_rcu(). OpenBMC-Staging-Count: 1 Reported-by: Jakub Kicinski Signed-off-by: Matt Johnston Signed-off-by: David S. Miller (cherry picked from commit dc121c0084910db985cf1c8ba6fce5d8c307cc02) Signed-off-by: Joel Stanley

mctp: test: fix skb free in test device tx

2022-03-18T00:37:53+00:00

In our test device, we're currently freeing skbs in the transmit path with kfree(), rather than kfree_skb(). This change uses the correct kfree_skb() instead. OpenBMC-Staging-Count: 1 Fixes: ded21b722995 ("mctp: Add test utils") Reported-by: kernel test robot Reported-by: Dan Carpenter Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller (cherry picked from commit d8519565447078f141c58ba4193d820f2cdf1914) Signed-off-by: Joel Stanley

mctp: Add test utils

2022-03-18T00:36:46+00:00

Add a new object for shared test utilities OpenBMC-Staging-Count: 1 Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller (cherry picked from commit ded21b72299529cc143a4213ea0ec4b0c620b8eb) Signed-off-by: Joel Stanley