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| author | Vlad Buslov <[email protected]> | 2023-06-12 09:34:26 +0000 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2023-06-15 06:03:16 +0000 |
| commit | c9a82bec02c339cdda99b37c5e62b3b71fc4209c (patch) | |
| tree | 8e4ba3b2f1cc67a3d71520cb605e01aa84fe6648 /drivers/gpu/drm/amd/amdgpu | |
| parent | ice: Fix ice module unload (diff) | |
| download | kernel-c9a82bec02c339cdda99b37c5e62b3b71fc4209c.tar.gz kernel-c9a82bec02c339cdda99b37c5e62b3b71fc4209c.zip | |
net/sched: cls_api: Fix lockup on flushing explicitly created chain
Mingshuai Ren reports:
When a new chain is added by using tc, one soft lockup alarm will be
generated after delete the prio 0 filter of the chain. To reproduce
the problem, perform the following steps:
(1) tc qdisc add dev eth0 root handle 1: htb default 1
(2) tc chain add dev eth0
(3) tc filter del dev eth0 chain 0 parent 1: prio 0
(4) tc filter add dev eth0 chain 0 parent 1:
Fix the issue by accounting for additional reference to chains that are
explicitly created by RTM_NEWCHAIN message as opposed to implicitly by
RTM_NEWTFILTER message.
Fixes: 726d061286ce ("net: sched: prevent insertion of new classifiers during chain flush")
Reported-by: Mingshuai Ren <[email protected]>
Closes: https://lore.kernel.org/lkml/[email protected]/T/
Signed-off-by: Vlad Buslov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu')
0 files changed, 0 insertions, 0 deletions