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Date: Tue, 25 Jan 2022 17:25:25 -0600 From: "Gustavo A. R. Silva" <gustavoars@...nel.org> To: Ian Abbott <abbotti@....co.uk>, H Hartley Sweeten <hsweeten@...ionengravers.com> Cc: linux-kernel@...r.kernel.org, "Gustavo A. R. Silva" <gustavoars@...nel.org>, linux-hardening@...r.kernel.org Subject: [PATCH][next] comedi: das16: Use struct_size() helper in comedi_alloc_spriv() Make use of the struct_size() helper instead of an open-coded version, in order to avoid any potential type mistakes or integer overflows that, in the worst scenario, could lead to heap overflows. Also, address the following sparse warnings: drivers/comedi/drivers/das16.c:964:45: warning: using sizeof on a flexible structure drivers/comedi/drivers/das16.c:998:45: warning: using sizeof on a flexible structure Link: https://github.com/KSPP/linux/issues/174 Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org> --- drivers/comedi/drivers/das16.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/comedi/drivers/das16.c b/drivers/comedi/drivers/das16.c index 937a69ce0977..728dc02156c8 100644 --- a/drivers/comedi/drivers/das16.c +++ b/drivers/comedi/drivers/das16.c @@ -961,7 +961,7 @@ static const struct comedi_lrange *das16_ai_range(struct comedi_device *dev, /* allocate single-range range table */ lrange = comedi_alloc_spriv(s, - sizeof(*lrange) + sizeof(*krange)); + struct_size(lrange, range, 1)); if (!lrange) return &range_unknown; @@ -995,7 +995,7 @@ static const struct comedi_lrange *das16_ao_range(struct comedi_device *dev, /* allocate single-range range table */ lrange = comedi_alloc_spriv(s, - sizeof(*lrange) + sizeof(*krange)); + struct_size(lrange, range, 1)); if (!lrange) return &range_unknown; -- 2.27.0
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