net/qla3xxx: Fix schedule while atomic in ql_sem_spinlock
Summary
UVI-2021-1000889: net/qla3xxx: fix schedule while atomic in ql_sem_spinlock. Affects Kernel versions < 3e324774411dc94282e166a301af822d75741263. No fix is published. How to fix ↓
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Background
The net/qla3xxx package is a part of the Linux Kernel ecosystem. It provides support for QLogic Fibre Channel Host Bus Adapters (HBAs). These HBAs are used for connecting servers to storage devices in data centers. The ql_sem_spinlock function in the qla3xxx package is responsible for acquiring and releasing a spinlock used for synchronization in the driver. However, a vulnerability exists in this function that allows a schedule while atomic condition, which can lead to a deadlock or other unexpected behavior.
Vulnerability Detail
The vulnerability in the ql_sem_spinlock function arises from a schedule while atomic condition. This means that the function is called in a context where the scheduler is disabled, such as in an interrupt handler. In such cases, if a scheduling operation is triggered within the function, it can result in a deadlock or other issues. An attacker with local access to the system could potentially exploit this vulnerability to cause a denial of service or gain elevated privileges.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is recommended to apply the fix mentioned in the 'how_to_fix' section.
Conclusion
The net/qla3xxx package in the Linux Kernel prior to version v5.4.126 is vulnerable to a schedule while atomic condition in the ql_sem_spinlock function. This vulnerability can lead to a deadlock or other unexpected behavior, potentially enabling an attacker to cause a denial of service or gain elevated privileges. Users should update their Linux Kernel to version v5.4.126 or a later version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a deadlock or other unexpected behavior, potentially causing a denial of service or enabling an attacker to gain elevated privileges.
Users of the Linux Kernel with the net/qla3xxx package prior to version v5.4.126 are affected by this vulnerability.
No, this vulnerability requires local access to the system to be exploited.
There is no known exploit for this vulnerability at the time of this report.
The only known mitigation is to update the Linux Kernel to version v5.4.126 or a later version that includes the fix.
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