On 10/17/24 14:59, Linus Walleij wrote:
[...]
+static unsigned long arm_kasan_mem_to_shadow(unsigned long addr)
+{
+ return (unsigned long)kasan_mem_to_shadow((void *)addr);
+}
+
`kasan_mem_to_shadow` function symbol is only exported with :
CONFIG_KASAN_GENERIC or defined(CONFIG_KASAN_SW_TAGS) from kasan.h
To me, the if condition you added below should be expanded with those
two macros.
[...]
void __check_vmalloc_seq(struct mm_struct *mm)
{
int seq;
do {
seq = atomic_read(&init_mm.context.vmalloc_seq);
- memcpy(pgd_offset(mm, VMALLOC_START),
- pgd_offset_k(VMALLOC_START),
- sizeof(pgd_t) * (pgd_index(VMALLOC_END) -
- pgd_index(VMALLOC_START)));
+ memcpy_pgd(mm, VMALLOC_START, VMALLOC_END);
+ if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
+ unsigned long start =
+ arm_kasan_mem_to_shadow(VMALLOC_START);
+ unsigned long end =
+ arm_kasan_mem_to_shadow(VMALLOC_END);
+ memcpy_pgd(mm, start, end);
+ }
/*
* Use a store-release so that other CPUs that observe the
* counter's new value are guaranteed to see the results of the
Otherwise it compiles with KASAN enabled, I am running some tests with
your patches.
Regards,
Clément
