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RDS: fix congestion map corruption for PAGE_SIZE > 4k 

When PAGE_SIZE > 4k single page can contain 2 RDS fragments. If
'rds_ib_cong_recv' ignore the RDS fragment offset in to the page it
then read the data fragment as far congestion map update and lead to
corruption of the RDS connection far congestion map.

Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
shamir rabinovitch 2016-04-07 07:57:36 -04:00 committed by David S. Miller
parent e98499ac63
commit 579ba85552
1 changed files with 1 additions and 1 deletions
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2
net/rds/ib_recv.c
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@ -796,7 +796,7 @@ static void rds_ib_cong_recv(struct rds_connection *conn,
addr = kmap_atomic(sg_page(&frag->f_sg));
src = addr + frag_off;
src = addr + frag->f_sg.offset + frag_off;
dst = (void *)map->m_page_addrs[map_page] + map_off;
for (k = 0; k < to_copy; k += 8) {
/* Record ports that became uncongested, ie