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| author |   Eric Dumazet <eric.dumazet@gmail.com> | 2011-01-24 14:41:20 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2011-01-24 14:41:20 -0800 |
| commit | fd0273c5033630b8673554cd39660435d1ab2ac4 (patch) | |
| tree | e13f583f7848dcc1c620f3e4598e22f96a2d8efc /net/ipv4/tcp_ipv4.c | |
| parent | inetpeer: Use correct AVL tree base pointer in inet_getpeer(). (diff) | |
| download | linux-dev-fd0273c5033630b8673554cd39660435d1ab2ac4.tar.xz linux-dev-fd0273c5033630b8673554cd39660435d1ab2ac4.zip | |
tcp: fix bug in listening_get_next()
commit a8b690f98baf9fb19 (tcp: Fix slowness in read /proc/net/tcp)
introduced a bug in handling of SYN_RECV sockets.
st->offset represents number of sockets found since beginning of
listening_hash[st->bucket].
We should not reset st->offset when iterating through
syn_table[st->sbucket], or else if more than ~25 sockets (if
PAGE_SIZE=4096) are in SYN_RECV state, we exit from listening_get_next()
with a too small st->offset
Next time we enter tcp_seek_last_pos(), we are not able to seek past
already found sockets.
Reported-by: PK <runningdoglackey@yahoo.com>
CC: Tom Herbert <therbert@google.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 856f68466d49..02f583b3744a 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1994,7 +1994,6 @@ static void *listening_get_next(struct seq_file *seq, void *cur) } req = req->dl_next; } - st->offset = 0; if (++st->sbucket >= icsk->icsk_accept_queue.listen_opt->nr_table_entries) break; get_req: |