Public bug reported:
When net_prio and net_cls cgroups are used, cgroup refcount is bogus, as
it's not incremented anymore, but decremented when sockets are closed.
This might lead to crashes possibly because of use-after-free when
packets are received as shown in LP #1886668.
Cascardo.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Bionic)
Importance: High
Assignee: Thadeu Lima de Souza Cascardo (cascardo)
Status: Confirmed
** Affects: linux (Ubuntu Eoan)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Eoan)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Status: New => Confirmed
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => High
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => Thadeu Lima de Souza Cascardo (cascardo)
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https://bugs.launchpad.net/bugs/1886860
Title:
cgroup refcount is bogus when cgroup_sk_alloc is disabled
Status in linux package in Ubuntu:
New
Status in linux source package in Bionic:
Confirmed
Status in linux source package in Eoan:
New
Status in linux source package in Focal:
New
Status in linux source package in Groovy:
New
Bug description:
When net_prio and net_cls cgroups are used, cgroup refcount is bogus,
as it's not incremented anymore, but decremented when sockets are
closed.
This might lead to crashes possibly because of use-after-free when
packets are received as shown in LP #1886668.
Cascardo.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1886860/+subscriptions
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