2015-08-24 19:16 GMT+03:00 Vladimir Murzin <vladimir.murzin@xxxxxxx>: > On 24/08/15 17:00, Andrey Ryabinin wrote: >> 2015-08-24 18:44 GMT+03:00 Vladimir Murzin <vladimir.murzin@xxxxxxx>: >>> >>> Another option would be having "sparse" shadow memory based on page >>> extension. I did play with that some time ago based on ideas from >>> original v1 KASan support for x86/arm - it is how 614be38 "irqchip: >>> gic-v3: Fix out of bounds access to cpu_logical_map" was caught. >>> It doesn't require any VA reservations, only some contiguous memory for >>> the page_ext itself, which serves as indirection level for the 0-order >>> shadow pages. >> >> We won't be able to use inline instrumentation (I could live with that), >> and most importantly, we won't be able to use stack instrumentation. >> GCC needs to know shadow address for inline and/or stack instrumentation >> to generate correct code. > > It's definitely a trade-off ;) > > Just for my understanding does that stack instrumentation is controlled > via -asan-stack? > Yup. -- 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>