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Commit dfc91042 authored by Eric Dumazet's avatar Eric Dumazet Committed by Greg Kroah-Hartman
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net: fix a race in dst_release()

[ Upstream commit d69bbf88 ]

Only cpu seeing dst refcount going to 0 can safely
dereference dst->flags.

Otherwise an other cpu might already have freed the dst.

Fixes: 27b75c95

 ("net: avoid RCU for NOCACHE dst")
Reported-by: default avatarGreg Thelen <gthelen@google.com>
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 02126db3
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