Hello, The recent "binfmt_elf: use ELF_ET_DYN_BASE only for PIE" patch: https://github.com/torvalds/linux/commit/eab09532d40090698b05a07c1c87f39fdbc5fab5 breaks user-space AddressSanitizer. AddressSanitizer makes assumptions about address space layout for substantial performance gains. There are multiple people complaining about this already: https://github.com/google/sanitizers/issues/837 https://twitter.com/kayseesee/status/894594085608013825 https://bugzilla.kernel.org/show_bug.cgi?id=196537 AddressSanitizer maps shadow memory at [0x00007fff7000-0x10007fff7fff] expecting that non-pie binaries will be below 2GB and pie binaries/modules will be at 0x55 or 0x7f. This is not the first time kernel address space shuffling breaks sanitizers. The last one was the move to 0x55. Is it possible to make this change less aggressive and keep the executable under 2GB? In future please be mindful of user-space sanitizers and talk to address-sanitizer@xxxxxxxxxxxxxxxx before shuffling address space. Thanks -- 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>
