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grtc.c: Fix Dereference before null check (CID #1399840)

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CID 1399840: Dereference before null check in grtc_ioctl().

Closes #4252
This commit is contained in:
Ryan Long
2021-02-16 17:15:01 -05:00
committed by Joel Sherrill
parent 4edcdf43c7
commit 1fd56a96fc
1 changed files with 3 additions and 1 deletions
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4
bsps/shared/grlib/tmtc/grtc.c
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@@ -1532,7 +1532,7 @@ static rtems_device_driver grtc_ioctl(rtems_device_major_number major, rtems_dev
struct grtc_priv *pDev; struct grtc_priv *pDev;
struct drvmgr_dev *dev; struct drvmgr_dev *dev;
rtems_libio_ioctl_args_t *ioarg = (rtems_libio_ioctl_args_t *)arg; rtems_libio_ioctl_args_t *ioarg = (rtems_libio_ioctl_args_t *)arg;
unsigned int *data = ioarg->buffer; unsigned int *data;
int status,frm_len,i,ret; int status,frm_len,i,ret;
struct grtc_ioc_buf_params *buf_arg; struct grtc_ioc_buf_params *buf_arg;
struct grtc_ioc_config *cfg; struct grtc_ioc_config *cfg;
@@ -1556,6 +1556,8 @@ static rtems_device_driver grtc_ioctl(rtems_device_major_number major, rtems_dev
if (!ioarg) if (!ioarg)
return RTEMS_INVALID_NAME; return RTEMS_INVALID_NAME;
data = ioarg->buffer;
ioarg->ioctl_return = 0; ioarg->ioctl_return = 0;
switch(ioarg->command) { switch(ioarg->command) {
case GRTC_IOC_START: case GRTC_IOC_START: