diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2019-08-21 10:06:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-22 14:28:09 -0700 |
| commit | dac4f1964a9cbfbf81df8d31caa04ced0d7613b5 (patch) | |
| tree | 52b3e79e32465590775f172e1106ae798df08ee3 /drivers/misc | |
| parent | e70c971d7d8ac5b19fea1c2fde0290bcf7881946 (diff) | |
misc: xilinx_sdfec: Fix a couple small information leaks
These structs have holes in them so we end up disclosing a few bytes of
uninitialized stack data.
drivers/misc/xilinx_sdfec.c:305 xsdfec_get_status() warn: check that 'status' doesn't leak information (struct has a hole after 'activity')
drivers/misc/xilinx_sdfec.c:449 xsdfec_get_turbo() warn: check that 'turbo_params' doesn't leak information (struct has a hole after 'scale')
We need to zero out the holes with memset().
Fixes: 6bd6a690c2e7 ("misc: xilinx_sdfec: Add stats & status ioctls")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Dragan Cvetic <dragan.cvetic@xilinx.com>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/20190821070606.GA26957@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/xilinx_sdfec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/misc/xilinx_sdfec.c b/drivers/misc/xilinx_sdfec.c index 912e939dec62..dc1b8b412712 100644 --- a/drivers/misc/xilinx_sdfec.c +++ b/drivers/misc/xilinx_sdfec.c @@ -295,6 +295,7 @@ static int xsdfec_get_status(struct xsdfec_dev *xsdfec, void __user *arg) struct xsdfec_status status; int err; + memset(&status, 0, sizeof(status)); spin_lock_irqsave(&xsdfec->error_data_lock, xsdfec->flags); status.state = xsdfec->state; xsdfec->state_updated = false; @@ -440,6 +441,7 @@ static int xsdfec_get_turbo(struct xsdfec_dev *xsdfec, void __user *arg) if (xsdfec->config.code == XSDFEC_LDPC_CODE) return -EIO; + memset(&turbo_params, 0, sizeof(turbo_params)); reg_value = xsdfec_regread(xsdfec, XSDFEC_TURBO_ADDR); turbo_params.scale = (reg_value & XSDFEC_TURBO_SCALE_MASK) >> |