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| author |   Peter Oskolkov <posk@google.com> | 2018-09-17 10:20:53 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-09-17 19:42:14 -0700 |
| commit | 30bfd93062814d6767e452a8f5ddcd97f7e38c7e (patch) | |
| tree | 23d727cb581ea70819fcf36316debf9939cf8bda /net/sched/act_sample.c | |
| parent | qmi_wwan: set DTR for modems in forced USB2 mode (diff) | |
| download | linux-dev-30bfd93062814d6767e452a8f5ddcd97f7e38c7e.tar.xz linux-dev-30bfd93062814d6767e452a8f5ddcd97f7e38c7e.zip | |
net/ipv6: do not copy dst flags on rt init
DST_NOCOUNT in dst_entry::flags tracks whether the entry counts
toward route cache size (net->ipv6.sysctl.ip6_rt_max_size).
If the flag is NOT set, dst_ops::pcpuc_entries counter is incremented
in dist_init() and decremented in dst_destroy().
This flag is tied to allocation/deallocation of dst_entry and
should not be copied from another dst/route. Otherwise it can happen
that dst_ops::pcpuc_entries counter grows until no new routes can
be allocated because the counter reached ip6_rt_max_size due to
DST_NOCOUNT not set and thus no counter decrements on gc-ed routes.
Fixes: 3b6761d18bc1 ("net/ipv6: Move dst flags to booleans in fib entries")
Cc: David Ahern <dsahern@gmail.com>
Acked-by: Wei Wang <weiwan@google.com>
Signed-off-by: Peter Oskolkov <posk@google.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/act_sample.c')
0 files changed, 0 insertions, 0 deletions