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| author |   Joseph Qi <joseph.qi@huawei.com> | 2013-09-11 14:20:01 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:56:50 -0700 |
| commit | 03dbe88aa9cd0d7b0a876b38bd75ce73b4522454 (patch) | |
| tree | 2adc8eb4f283cc2ffa3f6903e074f634c3f4a78f /fs | |
| parent | ocfs2: adjust code style for o2net_handler_tree_lookup() (diff) | |
| download | linux-dev-03dbe88aa9cd0d7b0a876b38bd75ce73b4522454.tar.xz linux-dev-03dbe88aa9cd0d7b0a876b38bd75ce73b4522454.zip | |
ocfs2: avoid possible NULL pointer dereference in o2net_accept_one()
Since o2nm_get_node_by_num() may return NULL, we add this check in
o2net_accept_one() to avoid possible NULL pointer dereference.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ocfs2/cluster/tcp.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c index 8c50c238577a..2cd2406b4140 100644 --- a/fs/ocfs2/cluster/tcp.c +++ b/fs/ocfs2/cluster/tcp.c @@ -1873,12 +1873,16 @@ static int o2net_accept_one(struct socket *sock) if (o2nm_this_node() >= node->nd_num) { local_node = o2nm_get_node_by_num(o2nm_this_node()); - printk(KERN_NOTICE "o2net: Unexpected connect attempt seen " - "at node '%s' (%u, %pI4:%d) from node '%s' (%u, " - "%pI4:%d)\n", local_node->nd_name, local_node->nd_num, - &(local_node->nd_ipv4_address), - ntohs(local_node->nd_ipv4_port), node->nd_name, - node->nd_num, &sin.sin_addr.s_addr, ntohs(sin.sin_port)); + if (local_node) + printk(KERN_NOTICE "o2net: Unexpected connect attempt " + "seen at node '%s' (%u, %pI4:%d) from " + "node '%s' (%u, %pI4:%d)\n", + local_node->nd_name, local_node->nd_num, + &(local_node->nd_ipv4_address), + ntohs(local_node->nd_ipv4_port), + node->nd_name, + node->nd_num, &sin.sin_addr.s_addr, + ntohs(sin.sin_port)); ret = -EINVAL; goto out; } |