3.12-stable review patch. If anyone has any objections, please let me know.
------------------ From: Ursula Braun <[email protected]> commit 6fb392b1a63ae36c31f62bc3fc8630b49d602b62 upstream. Check user-defined length in snmp ioctl request and allow request only if it fits into a qeth command buffer. Signed-off-by: Ursula Braun <[email protected]> Signed-off-by: Frank Blaschka <[email protected]> Reviewed-by: Heiko Carstens <[email protected]> Reported-by: Nico Golde <[email protected]> Reported-by: Fabian Yamaguchi <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/s390/net/qeth_core_main.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -4451,7 +4451,7 @@ int qeth_snmp_command(struct qeth_card * struct qeth_cmd_buffer *iob; struct qeth_ipa_cmd *cmd; struct qeth_snmp_ureq *ureq; - int req_len; + unsigned int req_len; struct qeth_arp_query_info qinfo = {0, }; int rc = 0; @@ -4467,6 +4467,10 @@ int qeth_snmp_command(struct qeth_card * /* skip 4 bytes (data_len struct member) to get req_len */ if (copy_from_user(&req_len, udata + sizeof(int), sizeof(int))) return -EFAULT; + if (req_len > (QETH_BUFSIZE - IPA_PDU_HEADER_SIZE - + sizeof(struct qeth_ipacmd_hdr) - + sizeof(struct qeth_ipacmd_setadpparms_hdr))) + return -EINVAL; ureq = memdup_user(udata, req_len + sizeof(struct qeth_snmp_ureq_hdr)); if (IS_ERR(ureq)) { QETH_CARD_TEXT(card, 2, "snmpnome"); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
