diff options
| author | Pavel Emelyanov <xemul@openvz.org> | 2007-11-15 02:57:06 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2007-11-15 02:57:06 -0800 |
| commit | dab6ba36888a12f3e3edff71eeef968fc159178a (patch) | |
| tree | b838883cd5cd8f55f2bcb31f16430dd5a10dcbca /include | |
| parent | bd7b3f34198071d8bec05180530c362f1800ba46 (diff) | |
| download | lwn-dab6ba36888a12f3e3edff71eeef968fc159178a.tar.gz lwn-dab6ba36888a12f3e3edff71eeef968fc159178a.zip | |
[INET]: Fix potential kfree on vmalloc-ed area of request_sock_queue
The request_sock_queue's listen_opt is either vmalloc-ed or
kmalloc-ed depending on the number of table entries. Thus it
is expected to be handled properly on free, which is done in
the reqsk_queue_destroy().
However the error path in inet_csk_listen_start() calls
the lite version of reqsk_queue_destroy, called
__reqsk_queue_destroy, which calls the kfree unconditionally.
Fix this and move the __reqsk_queue_destroy into a .c file as
it looks too big to be inline.
As David also noticed, this is an error recovery path only,
so no locking is required and the lopt is known to be not NULL.
reqsk_queue_yank_listen_sk is also now only used in
net/core/request_sock.c so we should move it there too.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/request_sock.h | 18 |
1 files changed, 1 insertions, 17 deletions
diff --git a/include/net/request_sock.h b/include/net/request_sock.h index 7aed02ce2b65..cff4608179c1 100644 --- a/include/net/request_sock.h +++ b/include/net/request_sock.h @@ -124,23 +124,7 @@ struct request_sock_queue { extern int reqsk_queue_alloc(struct request_sock_queue *queue, unsigned int nr_table_entries); -static inline struct listen_sock *reqsk_queue_yank_listen_sk(struct request_sock_queue *queue) -{ - struct listen_sock *lopt; - - write_lock_bh(&queue->syn_wait_lock); - lopt = queue->listen_opt; - queue->listen_opt = NULL; - write_unlock_bh(&queue->syn_wait_lock); - - return lopt; -} - -static inline void __reqsk_queue_destroy(struct request_sock_queue *queue) -{ - kfree(reqsk_queue_yank_listen_sk(queue)); -} - +extern void __reqsk_queue_destroy(struct request_sock_queue *queue); extern void reqsk_queue_destroy(struct request_sock_queue *queue); static inline struct request_sock * |