From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from e28smtp06.in.ibm.com ([122.248.162.6]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WIuW5-00021H-K2 for kexec@lists.infradead.org; Thu, 27 Feb 2014 06:32:22 +0000 Received: from /spool/local by e28smtp06.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 27 Feb 2014 12:01:57 +0530 Received: from d28relay01.in.ibm.com (d28relay01.in.ibm.com [9.184.220.58]) by d28dlp01.in.ibm.com (Postfix) with ESMTP id 3626BE0053 for ; Thu, 27 Feb 2014 12:05:29 +0530 (IST) Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay01.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id s1R6VTmP55574578 for ; Thu, 27 Feb 2014 12:01:30 +0530 Received: from d28av03.in.ibm.com (localhost [127.0.0.1]) by d28av03.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s1R6Vkxo002795 for ; Thu, 27 Feb 2014 12:01:46 +0530 Subject: [PATCH 07/10] Scrub data of unix socket buffers From: Aruna Balakrishnaiah Date: Thu, 27 Feb 2014 12:01:45 +0530 Message-ID: <20140227063145.5924.86410.stgit@aruna-ThinkPad-T420> In-Reply-To: <20140227063007.5924.5819.stgit@aruna-ThinkPad-T420> References: <20140227063007.5924.5819.stgit@aruna-ThinkPad-T420> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: kexec@lists.infradead.org Cc: kumagai-atsushi@mxc.nes.nec.co.jp Iterate from 0 to UNIX_HASH_SIZE and then walk the hlist in for (i = 0; i < UNIX_HASH_SIZE; i++) { struct list_head *list = &unix_socket_table[i]; ... } Walk each non-empty list in unix_socket_table struct sock *sk; sk_for_each(sk, node, &unix_socket_table[i]) For each socket iterate over the socket buffers in sk_receive_queue and sk_write_queue: struct sock { ... struct sk_buff_head sk_receive_queue; ... struct sk_buff_head sk_write_queue; ... }; struct sk_buff_head { struct sk_buff *next; struct sk_buff *prev; }; For each struct sk_buff in the two lists clear the memory referenced by skb->data / skb->data_len: struct sk_buff { ... unsigned int data_len; ... unsigned char *data; ... }; Signed-off-by: Aruna Balakrishnaiah --- eppic_scripts/unix_sk_buff.c | 81 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 eppic_scripts/unix_sk_buff.c diff --git a/eppic_scripts/unix_sk_buff.c b/eppic_scripts/unix_sk_buff.c new file mode 100644 index 0000000..6ab1e6c --- /dev/null +++ b/eppic_scripts/unix_sk_buff.c @@ -0,0 +1,81 @@ +string +sunix_opt() +{ + return "l"; +} + +string +sunix_usage() +{ + return "\n"; +} + +static void +sunix_showusage() +{ + printf("usage : sunix %s", sunix_usage()); +} + +string +sunix_help() +{ + return "Help"; +} + +int +sunix() +{ + int i; + int size; + struct hlist_head **tab; + struct sock_common *off = 0; + + tab = &unix_socket_table; + + for (i = 0; i < 256; i++) { + struct hlist_node *pos; + struct hlist_node *node; + struct hlist_head *tmp; + + tmp = (struct hlist_head *)(tab + i); + pos = tmp->first; + + while (pos) { + struct sock *sk; + struct sk_buff *next; + struct sk_buff_head *head; + + sk = (struct sock *)((unsigned long)pos - (unsigned long)&(off->skc_dontcopy_begin)); + + head = (struct sk_buff_head *)&(sk->sk_receive_queue); + next = (struct sk_buff *)sk->sk_receive_queue.next; + + while (next != head) + { + struct sk_buff *buff = (struct sk_buff *)next; + + memset((char *)buff->data, 'L', buff->data_len); + memset((char *)&(buff->data_len), 'L', 0x4); + + next = buff->next; + } + + head = (struct sk_buff_head *)&(sk->sk_write_queue); + next = (struct sk_buff *)sk->sk_write_queue.next; + + while (next != head) + { + struct sk_buff *buff = (struct sk_buff *)next; + + memset((char *)buff->data, 'L', buff->data_len); + memset((char *)&(buff->data_len), 'L', 0x4); + + next = buff->next; + } + + node = (struct hlist_node *)((unsigned long)sk + (unsigned long)&(off->skc_dontcopy_begin)); + pos = node->next; + } + } + return 1; +} _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec