On 19-06-20, 17:43, Gustavo A. R. Silva wrote: > Make use of the struct_size() helper instead of an open-coded version > in order to avoid any potential type mistakes. > > This code was detected with the help of Coccinelle and, audited and > fixed manually. > > Addresses-KSPP-ID: https://github.com/KSPP/linux/issues/83 > Signed-off-by: Gustavo A. R. Silva <gustavo...@kernel.org> > --- > drivers/dma/ti/k3-udma.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c > index 0d5fb154b8e2..411c54b86ba8 100644 > --- a/drivers/dma/ti/k3-udma.c > +++ b/drivers/dma/ti/k3-udma.c > @@ -2209,7 +2209,7 @@ udma_prep_slave_sg_pkt(struct udma_chan *uc, struct > scatterlist *sgl, > u32 ring_id; > unsigned int i; > > - d = kzalloc(sizeof(*d) + sglen * sizeof(d->hwdesc[0]), GFP_NOWAIT); > + d = kzalloc(struct_size(d, hwdesc, sglen), GFP_NOWAIT);
struct_size() is a * b + c but here we need, a + b * c.. the trailing struct is N times here.. > if (!d) > return NULL; > > @@ -2525,7 +2525,7 @@ udma_prep_dma_cyclic_pkt(struct udma_chan *uc, > dma_addr_t buf_addr, > if (period_len >= SZ_4M) > return NULL; > > - d = kzalloc(sizeof(*d) + periods * sizeof(d->hwdesc[0]), GFP_NOWAIT); > + d = kzalloc(struct_size(d, hwdesc, periods), GFP_NOWAIT); > if (!d) > return NULL; > > -- > 2.27.0 -- ~Vinod
