| Message ID | 20230817202941.never.657-kees@kernel.org |
|---|---|
| State | Accepted |
| Commit | a5be6db5a2880f9edda0f062a0bb23efd01ece37 |
| Headers | show |
| Series | clk: qcom: clk-spmi-pmic-div: Annotate struct spmi_pmic_div_clk_cc with __counted_by | expand |
Quoting Kees Cook (2023-08-17 13:29:42) > Prepare for the coming implementation by GCC and Clang of the __counted_by > attribute. Flexible array members annotated with __counted_by can have > their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS > (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > As found with Coccinelle[1], add __counted_by for struct spmi_pmic_div_clk_cc. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Bjorn Andersson <andersson@kernel.org> > Cc: Andy Gross <agross@kernel.org> > Cc: Konrad Dybcio <konrad.dybcio@linaro.org> > Cc: Michael Turquette <mturquette@baylibre.com> > Cc: Stephen Boyd <sboyd@kernel.org> > Cc: linux-arm-msm@vger.kernel.org > Cc: linux-clk@vger.kernel.org > Signed-off-by: Kees Cook <keescook@chromium.org> > --- Applied to clk-next
diff --git a/drivers/clk/qcom/clk-spmi-pmic-div.c b/drivers/clk/qcom/clk-spmi-pmic-div.c index f846be285f51..f394031eb0e5 100644 --- a/drivers/clk/qcom/clk-spmi-pmic-div.c +++ b/drivers/clk/qcom/clk-spmi-pmic-div.c @@ -177,7 +177,7 @@ static const struct clk_ops clk_spmi_pmic_div_ops = { struct spmi_pmic_div_clk_cc { int nclks; - struct clkdiv clks[]; + struct clkdiv clks[] __counted_by(nclks); }; static struct clk_hw *
Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct spmi_pmic_div_clk_cc. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Bjorn Andersson <andersson@kernel.org> Cc: Andy Gross <agross@kernel.org> Cc: Konrad Dybcio <konrad.dybcio@linaro.org> Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: linux-arm-msm@vger.kernel.org Cc: linux-clk@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/clk/qcom/clk-spmi-pmic-div.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)