For arm, when load_module success, the mod->init_layout.base would
be free in function do_free_init, but do not remove it's unwind table
from the unwind_tables' list. And later the above mod->init_layout.base
would alloc for another module's text section, and add to the
unwind_tables which cause one address can found more than two unwind table
in the unwind_tables' list, therefore may get to errror unwind table to
backtrace, and get an error backtrace.
Signed-off-by: chenzefeng <chenzefeng2@xxxxxxxxxx>
---
arch/arm/kernel/module.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index deef17f..a4eb5f4 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -403,14 +403,24 @@ int module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
return 0;
}
-void
-module_arch_cleanup(struct module *mod)
-{
+
#ifdef CONFIG_ARM_UNWIND
+void module_arch_cleanup(struct module *mod)
+{
int i;
for (i = 0; i < ARM_SEC_MAX; i++)
- if (mod->arch.unwind[i])
+ if (mod->arch.unwind[i]) {
unwind_table_del(mod->arch.unwind[i]);
-#endif
+ mod->arch.unwind[i] = NULL;
+ }
}
+
+void module_arch_freeing_init(struct module *mod)
+{
+ if (mod->arch.unwind[ARM_SEC_INIT]) {
+ unwind_table_del(mod->arch.unwind[ARM_SEC_INIT]);
+ mod->arch.unwind[ARM_SEC_INIT] = NULL;
+ }
+}
+#endif
--
1.8.5.6
