3.16.72-rc1 review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter dan.carpenter@oracle.com
commit 22c971db7dd4b0ad8dd88e99c407f7a1f4231a2e upstream.
Colin King reported a bug in read_bbreg_hdl():
memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
The problem is that "val" is uninitialized.
This code is obviously not useful, but so far as I can tell "pcmd->cmdcode" is never GEN_CMD_CODE(_Read_BBREG) so it's not harmful either. For now the easiest fix is to just call r8712_free_cmd_obj() and return.
Fixes: 2865d42c78a9 ("staging: r8712u: Add the new driver to the mainline kernel") Reported-by: Colin Ian King colin.king@canonical.com Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/staging/rtl8712/rtl8712_cmd.c | 10 +--------- drivers/staging/rtl8712/rtl8712_cmd.h | 2 +- 2 files changed, 2 insertions(+), 10 deletions(-)
--- a/drivers/staging/rtl8712/rtl8712_cmd.c +++ b/drivers/staging/rtl8712/rtl8712_cmd.c @@ -155,19 +155,11 @@ static u8 write_macreg_hdl(struct _adapt
static u8 read_bbreg_hdl(struct _adapter *padapter, u8 *pbuf) { - u32 val; - void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd); struct readBB_parm *prdbbparm; struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
prdbbparm = (struct readBB_parm *)pcmd->parmbuf; - if (pcmd->rsp && pcmd->rspsz > 0) - memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz); - pcmd_callback = cmd_callback[pcmd->cmdcode].callback; - if (pcmd_callback == NULL) - r8712_free_cmd_obj(pcmd); - else - pcmd_callback(padapter, pcmd); + r8712_free_cmd_obj(pcmd); return H2C_SUCCESS; }
--- a/drivers/staging/rtl8712/rtl8712_cmd.h +++ b/drivers/staging/rtl8712/rtl8712_cmd.h @@ -152,7 +152,7 @@ enum rtl8712_h2c_cmd { static struct _cmd_callback cmd_callback[] = { {GEN_CMD_CODE(_Read_MACREG), NULL}, /*0*/ {GEN_CMD_CODE(_Write_MACREG), NULL}, - {GEN_CMD_CODE(_Read_BBREG), &r8712_getbbrfreg_cmdrsp_callback}, + {GEN_CMD_CODE(_Read_BBREG), NULL}, {GEN_CMD_CODE(_Write_BBREG), NULL}, {GEN_CMD_CODE(_Read_RFREG), &r8712_getbbrfreg_cmdrsp_callback}, {GEN_CMD_CODE(_Write_RFREG), NULL}, /*5*/