** Changed in: linux-oem-5.10 (Ubuntu Focal)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1926564
Title:
An recursive locking in igb and igc drivers
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux-oem-5.10 source package in Focal:
Fix Committed
Status in linux source package in Hirsute:
In Progress
Status in linux source package in Impish:
In Progress
Bug description:
[Impact]
The rtnl_lock() has been called in rtnetlink_rcv_msg(), and then in
__dev_open() it calls pm_runtime_resume() to resume devices, and in
some devices' resume function(igb_resum,igc_resume) they calls rtnl_lock()
again. That leads to a recursive lock.
This issue is introduced by below commit since v5.9-rc1
bd869245a3dc net: core: try to runtime-resume detached device in __dev_open
[Fix]
This commit currently is still under discussion fixes the issue.
https://lkml.org/lkml/2021/4/20/123
[Test]
Verified on Dell Precision workstations.
[Where problems could occur]
The patch is pretty straightforward, no problems could occur by this change.
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