Re: [PATCH v2 6/7] sections: Add new is_kernel() and is_kernel_text()
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2021-07-28 15:32:14
Also in:
linuxppc-dev, lkml
On Wed, 28 Jul 2021 16:13:19 +0800 Kefeng Wang [off-list ref] wrote:
quoted hunk ↗ jump to hunk
@@ -64,8 +64,7 @@ const struct exception_table_entry *search_exception_tables(unsigned long addr) int notrace core_kernel_text(unsigned long addr) { - if (addr >= (unsigned long)_stext && - addr < (unsigned long)_etext) + if (is_kernel_text(addr))
Perhaps this was a bug, and these functions should be checking the gate area as well, as that is part of kernel text. -- Steve
quoted hunk ↗ jump to hunk
return 1; if (system_state < SYSTEM_RUNNING &&diff --git a/mm/kasan/report.c b/mm/kasan/report.c index 884a950c7026..88f5b0c058b7 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c@@ -235,7 +235,7 @@ static void describe_object(struct kmem_cache *cache, void *object, static inline bool kernel_or_module_addr(const void *addr) { - if (addr >= (void *)_stext && addr < (void *)_end) + if (is_kernel((unsigned long)addr)) return true; if (is_module_address((unsigned long)addr)) return true;--