openEuler inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I3D58V CVE: NA
---------------------------------- No unlock operation is performed on the mpam_devices_lock before the return statement, which may lead to a deadlock.
Signed-off-by: Zhang Ming 154842638@qq.com Reported-by: Jian Cheng cj.chengjian@huawei.com Suggested-by: Jian Cheng cj.chengjian@huawei.com --- arch/arm64/kernel/mpam/mpam_device.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kernel/mpam/mpam_device.c b/arch/arm64/kernel/mpam/mpam_device.c index 1aca24f570d3..d8511527970a 100644 --- a/arch/arm64/kernel/mpam/mpam_device.c +++ b/arch/arm64/kernel/mpam/mpam_device.c @@ -560,8 +560,10 @@ static void __init mpam_enable(struct work_struct *work) mutex_lock(&mpam_devices_lock); mpam_enable_squash_features(); err = mpam_allocate_config(); - if (err) + if (err) { + mutex_unlock(&mpam_devices_lock); return; + } mutex_unlock(&mpam_devices_lock);
mpam_enable_irqs();