Public bug reported: [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. ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux-oem-5.10 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux-oem-5.10 (Ubuntu Focal) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux (Ubuntu Hirsute) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Affects: linux (Ubuntu Impish) Importance: Undecided Assignee: AceLan Kao (acelankao) Status: In Progress ** Tags: oem-priority originate-from-1916870 originate-from-1917841 originate-from-1924661 somerville ** Also affects: linux (Ubuntu Impish) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Hirsute) Importance: Undecided Status: New ** Also affects: linux-oem-5.10 (Ubuntu) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: linux-oem-5.10 (Ubuntu Focal) Importance: Undecided Status: New ** No longer affects: linux (Ubuntu Focal) ** No longer affects: linux-oem-5.10 (Ubuntu Hirsute) ** No longer affects: linux-oem-5.10 (Ubuntu Impish) ** Changed in: linux-oem-5.10 (Ubuntu) Status: New => Invalid ** Changed in: linux (Ubuntu Hirsute) Status: New => In Progress ** Changed in: linux (Ubuntu Impish) Status: New => In Progress ** Changed in: linux-oem-5.10 (Ubuntu Focal) Status: New => In Progress ** Changed in: linux (Ubuntu Hirsute) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux (Ubuntu Impish) Assignee: (unassigned) => AceLan Kao (acelankao) ** Changed in: linux-oem-5.10 (Ubuntu Focal) Assignee: (unassigned) => AceLan Kao (acelankao) ** Description changed: [Impact] + bd869245a3dc net: core: try to runtime-resume detached device in __dev_open [Fix] [Test] [Where problems could occur] ** Tags added: oem-priority originate-from-1924661 somerville ** Tags added: originate-from-1916870 ** Tags added: originate-from-1917841 ** Description changed: [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://www.spinics.net/lists/netdev/msg736880.html [Test] + Verified on Dell Precision workstations. [Where problems could occur] + The patch is pretty straightforward, no problems could occur by this change. ** Description changed: [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://www.spinics.net/lists/netdev/msg736880.html + 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. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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: In Progress 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. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1926564/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
