
5.10 stable commit2b00b2a0e6
("writeback, cgroup: fix null-ptr-deref write in bdi_split_work_to_wbs") is a backport of upstream 6.3 commit 1ba1199ec574. In the 5.10 stable commit backport percpu_ref_exit() is called twice: first in cgwb_release_workfn() and then in cgwb_free_rcu(). The 2nd call is benign as percpu_ref_exit() internally detects there's nothing to do. This fixes an non-upstream issue that only applies to 5.10.y. Fixes:2b00b2a0e6
("writeback, cgroup: fix null-ptr-deref write in bdi_split_work_to_wbs") Signed-off-by: Greg Thelen <gthelen@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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26 KiB