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| author | Eric Dumazet <edumazet@google.com> | 2015-11-02 18:03:11 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-11-03 04:47:14 +0100 |
| commit | 1d6119baf0610f813eb9d9580eb4fd16de5b4ceb (patch) | |
| tree | 0ea51e8f1fc3135c901acce5f49469b5e37f61b9 /net/ipv6/ip6_offload.h | |
| parent | ravb: use pdev rather than ndev for error messages (diff) | |
| download | linux-1d6119baf0610f813eb9d9580eb4fd16de5b4ceb.tar.xz linux-1d6119baf0610f813eb9d9580eb4fd16de5b4ceb.zip | |
net: fix percpu memory leaks
This patch fixes following problems :
1) percpu_counter_init() can return an error, therefore
init_frag_mem_limit() must propagate this error so that
inet_frags_init_net() can do the same up to its callers.
2) If ip[46]_frags_ns_ctl_register() fail, we must unwind
properly and free the percpu_counter.
Without this fix, we leave freed object in percpu_counters
global list (if CONFIG_HOTPLUG_CPU) leading to crashes.
This bug was detected by KASAN and syzkaller tool
(http://github.com/google/syzkaller)
Fixes: 6d7b857d541e ("net: use lib/percpu_counter API for fragmentation mem accounting")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_offload.h')
0 files changed, 0 insertions, 0 deletions