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staging: rtl8723bs: moved contexts for arc4 encryption in struct security_priv

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moved struct arc4_ctx in struct security_priv to avoid stack allocation
inside encryption routines.

this has been done to fix the following 0-DAY issues:

>> drivers/staging/rtl8723bs/core/rtw_security.c:89:6: warning:
stack frame size of 1120 bytes in function 'rtw_wep_encrypt'
[-Wframe-$
   void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
        ^
>> drivers/staging/rtl8723bs/core/rtw_security.c:145:6:
warning: stack frame size of 1088 bytes in function 'rtw_wep_decrypt'
[-Wframe$
   void rtw_wep_decrypt(struct adapter  *padapter, u8 *precvframe)
        ^
>> drivers/staging/rtl8723bs/core/rtw_security.c:514:5:
warning: stack frame size of 1136 bytes in function 'rtw_tkip_encrypt'
[-Wfram$
   u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
       ^
>> drivers/staging/rtl8723bs/core/rtw_security.c:586:5:
warning: stack frame size of 1104 bytes in function 'rtw_tkip_decrypt'
[-Wfram$
   u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
       ^

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/20210521144158.2440-1-fabioaiuto83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fabio Aiuto 2021-05-21 16:41:58 +02:00 committed by Greg Kroah-Hartman
parent 1b4c0f3bbd
commit a1b8a9bbce
2 changed files with 23 additions and 21 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
drivers/staging/rtl8723bs/core/rtw_security.c
View file

@ -8,7 +8,6 @@
#include <drv_types.h>
#include <rtw_debug.h>
#include <crypto/aes.h>
#include <crypto/arc4.h>
static const char * const _security_type_str[] = {
"N/A",
@ -38,7 +37,6 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
{ /* exclude ICV */
unsigned char crc[4];
struct arc4_ctx mycontext;
signed int curfragnum, length;
u32 keylength;
@ -49,6 +47,7 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib;
struct security_priv *psecuritypriv = &padapter->securitypriv;
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
struct arc4_ctx *ctx = &psecuritypriv->xmit_arc4_ctx;
if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL)
return;
@ -72,16 +71,16 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
*((__le32 *)crc) = ~crc32_le(~0, payload, length);
arc4_setkey(&mycontext, wepkey, 3 + keylength);
arc4_crypt(&mycontext, payload, payload, length);
arc4_crypt(&mycontext, payload + length, crc, 4);
arc4_setkey(ctx, wepkey, 3 + keylength);
arc4_crypt(ctx, payload, payload, length);
arc4_crypt(ctx, payload + length, crc, 4);
} else {
length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
*((__le32 *)crc) = ~crc32_le(~0, payload, length);
arc4_setkey(&mycontext, wepkey, 3 + keylength);
arc4_crypt(&mycontext, payload, payload, length);
arc4_crypt(&mycontext, payload + length, crc, 4);
arc4_setkey(ctx, wepkey, 3 + keylength);
arc4_crypt(ctx, payload, payload, length);
arc4_crypt(ctx, payload + length, crc, 4);
pframe += pxmitpriv->frag_len;
pframe = (u8 *)round_up((SIZE_PTR)(pframe), 4);
@ -94,13 +93,13 @@ void rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe)
{
/* exclude ICV */
u8 crc[4];
struct arc4_ctx mycontext;
signed int length;
u32 keylength;
u8 *pframe, *payload, *iv, wepkey[16];
u8 keyindex;
struct rx_pkt_attrib *prxattrib = &(((union recv_frame *)precvframe)->u.hdr.attrib);
struct security_priv *psecuritypriv = &padapter->securitypriv;
struct arc4_ctx *ctx = &psecuritypriv->recv_arc4_ctx;
pframe = (unsigned char *)((union recv_frame *)precvframe)->u.hdr.rx_data;
@ -118,8 +117,8 @@ void rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe)
payload = pframe+prxattrib->iv_len+prxattrib->hdrlen;
/* decrypt payload include icv */
arc4_setkey(&mycontext, wepkey, 3 + keylength);
arc4_crypt(&mycontext, payload, payload, length);
arc4_setkey(ctx, wepkey, 3 + keylength);
arc4_crypt(ctx, payload, payload, length);
/* calculate icv and compare the icv */
*((u32 *)crc) = le32_to_cpu(~crc32_le(~0, payload, length - 4));
@ -467,7 +466,6 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
u8 ttkey[16];
u8 crc[4];
u8 hw_hdr_offset = 0;
struct arc4_ctx mycontext;
signed int curfragnum, length;
u8 *pframe, *payload, *iv, *prwskey;
@ -475,6 +473,7 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
struct pkt_attrib *pattrib = &((struct xmit_frame *)pxmitframe)->attrib;
struct security_priv *psecuritypriv = &padapter->securitypriv;
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
struct arc4_ctx *ctx = &psecuritypriv->xmit_arc4_ctx;
u32 res = _SUCCESS;
if (((struct xmit_frame *)pxmitframe)->buf_addr == NULL)
@ -509,17 +508,17 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
*((__le32 *)crc) = ~crc32_le(~0, payload, length);
arc4_setkey(&mycontext, rc4key, 16);
arc4_crypt(&mycontext, payload, payload, length);
arc4_crypt(&mycontext, payload + length, crc, 4);
arc4_setkey(ctx, rc4key, 16);
arc4_crypt(ctx, payload, payload, length);
arc4_crypt(ctx, payload + length, crc, 4);
} else {
length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
*((__le32 *)crc) = ~crc32_le(~0, payload, length);
arc4_setkey(&mycontext, rc4key, 16);
arc4_crypt(&mycontext, payload, payload, length);
arc4_crypt(&mycontext, payload + length, crc, 4);
arc4_setkey(ctx, rc4key, 16);
arc4_crypt(ctx, payload, payload, length);
arc4_crypt(ctx, payload + length, crc, 4);
pframe += pxmitpriv->frag_len;
pframe = (u8 *)round_up((SIZE_PTR)(pframe), 4);
@ -539,7 +538,6 @@ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
u8 rc4key[16];
u8 ttkey[16];
u8 crc[4];
struct arc4_ctx mycontext;
signed int length;
u8 *pframe, *payload, *iv, *prwskey;
@ -547,6 +545,7 @@ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
struct sta_info *stainfo;
struct rx_pkt_attrib *prxattrib = &((union recv_frame *)precvframe)->u.hdr.attrib;
struct security_priv *psecuritypriv = &padapter->securitypriv;
struct arc4_ctx *ctx = &psecuritypriv->recv_arc4_ctx;
u32 res = _SUCCESS;
pframe = (unsigned char *)((union recv_frame *)precvframe)->u.hdr.rx_data;
@ -616,8 +615,8 @@ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
/* 4 decrypt payload include icv */
arc4_setkey(&mycontext, rc4key, 16);
arc4_crypt(&mycontext, payload, payload, length);
arc4_setkey(ctx, rc4key, 16);
arc4_crypt(ctx, payload, payload, length);
*((u32 *)crc) = le32_to_cpu(~crc32_le(~0, payload, length - 4));

3
drivers/staging/rtl8723bs/include/rtw_security.h
View file

@ -7,6 +7,7 @@
#ifndef __RTW_SECURITY_H_
#define __RTW_SECURITY_H_
#include <crypto/arc4.h>
#define _NO_PRIVACY_ 0x0
#define _WEP40_ 0x1
@ -127,6 +128,8 @@ struct security_priv {
u8 wps_ie[MAX_WPS_IE_LEN];/* added in assoc req */
int wps_ie_len;
struct arc4_ctx xmit_arc4_ctx;
struct arc4_ctx recv_arc4_ctx;
u8 binstallGrpkey;
u8 binstallBIPkey;