On 05/26/2015 04:35 PM, Linus Walleij wrote: > On Fri, May 15, 2015 at 3:59 PM, Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx> wrote: > > And then at boot I just get this: > > kasan test: kmalloc_oob_right out-of-bounds to right > kasan test: kmalloc_oob_left out-of-bounds to left > kasan test: kmalloc_node_oob_right kmalloc_node(): out-of-bounds to right > kasan test: kmalloc_large_oob_rigth kmalloc large allocation: > out-of-bounds to right > kasan test: kmalloc_oob_krealloc_more out-of-bounds after krealloc more > kasan test: kmalloc_oob_krealloc_less out-of-bounds after krealloc less > kasan test: kmalloc_oob_16 kmalloc out-of-bounds for 16-bytes access > kasan test: kmalloc_oob_in_memset out-of-bounds in memset > kasan test: kmalloc_uaf use-after-free > kasan test: kmalloc_uaf_memset use-after-free in memset > kasan test: kmalloc_uaf2 use-after-free after another kmalloc > kasan test: kmem_cache_oob out-of-bounds in kmem_cache_alloc > kasan test: kasan_stack_oob out-of-bounds on stack > kasan test: kasan_global_oob out-of-bounds global variable > > W00t no nice KASan warnings (which is what I expect). > > This is my compiler by the way: > $ arm-linux-gnueabihf-gcc --version > arm-linux-gnueabihf-gcc (crosstool-NG linaro-1.13.1-4.9-2014.09 - > Linaro GCC 4.9-2014.09) 4.9.2 20140904 (prerelease) > > I did the same exercise on the foundation model (FVP) and I guess > that is what you developed the patch set on because there I got > nice KASan dumps: > That's not kasan dumps. That is slub debug output. KASan warnings starts with "BUG: KASan: use after free/out of bounds access " line. > I wonder were the problem lies, any hints where to start looking > to fix this? > I suspect that your compiler lack -fsantize=kernel-address support. It seems that GCC 4.9.2 doesn't supports -fsanitize=address/kernel-address on aarch64. I tested this patchset on Cavium Thunder-x and on FVP also and didn't observe any problems. > Yours, > Linus Walleij > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>