The kmemleak_*_phys() interface uses "min_low_pfn" and "max_low_pfn" to check address. But on some architectures, kmemleak_*_phys() is called before those two variables initialized. The following steps will be taken: 1) Add OBJECT_PHYS flag and rbtree for the objects allocated with physical address 2) Store physical address in objects if allocated with OBJECT_PHYS 3) Check the boundary when scan instead of in kmemleak_*_phys() This patch set will solve: https://lore.kernel.org/r/20220527032504.30341-1-yee.lee@xxxxxxxxxxxx https://lore.kernel.org/r/9dd08bb5-f39e-53d8-f88d-bec598a08c93@xxxxxxxxx v3: https://lore.kernel.org/r/20220609124950.1694394-1-patrick.wang.shcn@xxxxxxxxx v2: https://lore.kernel.org/r/20220603035415.1243913-1-patrick.wang.shcn@xxxxxxxxx v1: https://lore.kernel.org/r/20220531150823.1004101-1-patrick.wang.shcn@xxxxxxxxx v3->v4: - fix a build warning - move the prototype change of kmemleak_alloc_phys() and the kmemleak_not_leak_phys() removal to a separate patch (patch 1) v2->v3: - remove the min_count argument to kmemleak_alloc_phys() function and assume it's 0 - remove unused kmemleak_not_leak_phys() function - add functions to reduce unnecessary changes - remove the check for kasan_reset_tag() - add Fixes tag in patch 3 v1->v2: - add rbtree for the objects allocated with physical address - store physical address in objects if allocated with OBJECT_PHYS - check the upper object boundary as well and avoid duplicate check Patrick Wang (4): mm: kmemleak: remove kmemleak_not_leak_phys() and the min_count argument to kmemleak_alloc_phys() mm: kmemleak: add OBJECT_PHYS flag for objects allocated with physical address mm: kmemleak: add rbtree and store physical address for objects allocated with PA mm: kmemleak: check physical address when scan Documentation/dev-tools/kmemleak.rst | 1 - drivers/of/fdt.c | 2 +- include/linux/kmemleak.h | 8 +- mm/kmemleak.c | 200 ++++++++++++++++-------- mm/memblock.c | 14 +- tools/testing/memblock/linux/kmemleak.h | 2 +- 6 files changed, 145 insertions(+), 82 deletions(-) -- 2.25.1
