inet: frags: better deal with smp races
Multiple cpus might attempt to insert a new fragment in rhashtable, if for example RPS is buggy, as reported by 배석진 in https://patchwork.ozlabs.org/patch/994601/ We use rhashtable_lookup_get_insert_key() instead of rhashtable_insert_fast() to let cpus losing the race free their own inet_frag_queue and use the one that was inserted by another cpu. Fixes: 648700f7 ("inet: frags: use rhashtables for reassembly units") Signed-off-by:Eric Dumazet <edumazet@google.com> Reported-by:
배석진 <soukjin.bae@samsung.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
e12c2252
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