The patchsets help to produce KASAN report when size is negative numbers in memory operation function. It is helpful for programmer to solve the undefined behavior issue. Patch 1 based on Dmitry's review and suggestion, patch 2 is a test in order to verify the patch 1. [1]https://bugzilla.kernel.org/show_bug.cgi?id=199341 [2]https://lore.kernel.org/linux-arm-kernel/20190927034338.15813-1-walter-zh.wu@xxxxxxxxxxxx/ Walter Wu (2): kasan: detect negative size in memory operation function kasan: add test for invalid size in memmove --- Changes in v2: fix the indentation, thanks for the reminder Matthew. Changes in v3: Add a confition for memory operation function, need to avoid the false alarm when KASAN un-initialized. Changes in v4: modify negative size condition modify comments modify the fixed code about early stages of boot --- include/linux/kasan.h | 2 +- lib/test_kasan.c | 18 ------------------ mm/kasan/common.c | 25 +++++++------------------ mm/kasan/generic.c | 9 ++++----- mm/kasan/generic_report.c | 11 ----------- mm/kasan/kasan.h | 2 +- mm/kasan/report.c | 5 ++++- mm/kasan/tags.c | 9 ++++----- mm/kasan/tags_report.c | 11 ----------- 9 files changed, 21 insertions(+), 71 deletions(-) -- 2.18.0
