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[SCSI] qla4xxx: Fix memory corruption issue in qla4xxx_get_ep_fwdb. 

In qla4xxx_get_ep_fwdb(), dst_addr is of type struct sockaddr.
We are copying sizeof(struct sockaddr_in6) bytes to dst_addr
which is 12 bytes larger. This will cause memory corruption.
So we change dst_addr to struct sockaddr_storage which is
of 128 byte, large enough to hold sizeof(struct sockaddr_in6).

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Manish Rangankar <manish.rangankar@qlogic.com>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Manish Rangankar 2012-11-23 06:58:40 -05:00 committed by James Bottomley
parent ad5da8c404
commit 3dd4849c25
1 changed files with 7 additions and 4 deletions
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11
drivers/scsi/qla4xxx/ql4_os.c
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@ -4685,7 +4685,8 @@ static struct iscsi_endpoint *qla4xxx_get_ep_fwdb(struct scsi_qla_host *ha,
struct iscsi_endpoint *ep;
struct sockaddr_in *addr;
struct sockaddr_in6 *addr6;
struct sockaddr *dst_addr;
struct sockaddr *t_addr;
struct sockaddr_storage *dst_addr;
char *ip;
/* TODO: need to destroy on unload iscsi_endpoint*/
@ -4694,21 +4695,23 @@ static struct iscsi_endpoint *qla4xxx_get_ep_fwdb(struct scsi_qla_host *ha,
return NULL;
if (fw_ddb_entry->options & DDB_OPT_IPV6_DEVICE) {
dst_addr->sa_family = AF_INET6;
t_addr = (struct sockaddr *)dst_addr;
t_addr->sa_family = AF_INET6;
addr6 = (struct sockaddr_in6 *)dst_addr;
ip = (char *)&addr6->sin6_addr;
memcpy(ip, fw_ddb_entry->ip_addr, IPv6_ADDR_LEN);
addr6->sin6_port = htons(le16_to_cpu(fw_ddb_entry->port));
} else {
dst_addr->sa_family = AF_INET;
t_addr = (struct sockaddr *)dst_addr;
t_addr->sa_family = AF_INET;
addr = (struct sockaddr_in *)dst_addr;
ip = (char *)&addr->sin_addr;
memcpy(ip, fw_ddb_entry->ip_addr, IP_ADDR_LEN);
addr->sin_port = htons(le16_to_cpu(fw_ddb_entry->port));
}
ep = qla4xxx_ep_connect(ha->host, dst_addr, 0);
ep = qla4xxx_ep_connect(ha->host, (struct sockaddr *)dst_addr, 0);
vfree(dst_addr);
return ep;
}