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Eric Dumazet says: ==================== inet: frags: avoid possible races at netns dismantle This patch series fixes a race happening on netns dismantle with frag queues. While rhashtable_free_and_destroy() is running, concurrent timers might run inet_frag_kill() and attempt rhashtable_remove_fast() calls. This is not allowed by rhashtable logic. Since I do not want to add expensive synchronize_rcu() calls in the netns dismantle path, I had to no longer inline netns_frags structures, but dynamically allocate them. The ten first patches make this preparation, so that the last patch clearly shows the fix. As this patch series is not exactly trivial, I chose to target 5.3. We will backport it once soaked a bit. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel
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