On Mon, Nov 15, 2021 at 05:44:33PM +0100, Marco Elver wrote:

On Mon, Nov 15, 2021 at 05:12PM +0100, Geert Uytterhoeven wrote:
[...]

quoted

quoted

  + /kisskb/src/include/linux/fortify-string.h: error: call to '__read_overflow' declared with attribute error: detected read beyond size of object (1st parameter):  => 263:25, 277:17

    in lib/test_kasan.c

s390-all{mod,yes}config
arm64-allmodconfig (gcc11)

Kees, wasn't that what [1] was meant to fix?
[1] https://lkml.kernel.org/r/20211006181544.1670992-1-keescook@chromium.org

[1] fixed the ones I found when scanning for __write_overflow(). [2]
fixed some others, so it's possible there are yet more to fix?

Taking a look at Linus's tree, though, the "263" and "277" lines don't
line up correctly. I'll go see if I can reproduce this. Is this with
W=1?

-Kees

[2] https://www.ozlabs.org/~akpm/mmotm/broken-out/kasan-test-consolidate-workarounds-for-unwanted-__alloc_size-protection.patch


-- 
Kees Cook

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