In the error path of load_module(), under the free_module label, the
code calls lockdep_free_key_range() to release lock classes associated
with the MOD_DATA, MOD_RODATA and MOD_RO_AFTER_INIT module regions, and
subsequently invokes module_deallocate().
Since commit ac3b43283923 ("module: replace module_layout with
module_memory"), the module_deallocate() function calls free_mod_mem(),
which releases the lock classes as well and considers all module
regions.
Attempting to free these classes twice is unnecessary. Remove the
redundant code in load_module().
Signed-off-by: Petr Pavlu <[email protected]>
---
kernel/module/main.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/kernel/module/main.c b/kernel/module/main.c
index 710ee30b3bea..bcd259505c8b 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -3544,12 +3544,6 @@ static int load_module(struct load_info *info, const
char __user *uargs,
mutex_unlock(&module_mutex);
free_module:
mod_stat_bump_invalid(info, flags);
- /* Free lock-classes; relies on the preceding sync_rcu() */
- for_class_mod_mem_type(type, core_data) {
- lockdep_free_key_range(mod->mem[type].base,
- mod->mem[type].size);
- }
-
module_memory_restore_rox(mod);
module_deallocate(mod, info);
free_copy:
base-commit: 3609fa95fb0f2c1b099e69e56634edb8fc03f87c
--
2.52.0
