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Diffstat (limited to 'kernel/livepatch')
-rw-r--r--kernel/livepatch/core.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index 284e2691e380..9ec555732f1a 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -179,7 +179,9 @@ static int klp_find_object_symbol(const char *objname, const char *name,
.count = 0
};
+ mutex_lock(&module_mutex);
kallsyms_on_each_symbol(klp_find_callback, &args);
+ mutex_unlock(&module_mutex);
if (args.count == 0)
pr_err("symbol '%s' not found in symbol table\n", name);
@@ -219,13 +221,19 @@ static int klp_verify_vmlinux_symbol(const char *name, unsigned long addr)
.name = name,
.addr = addr,
};
+ int ret;
- if (kallsyms_on_each_symbol(klp_verify_callback, &args))
- return 0;
+ mutex_lock(&module_mutex);
+ ret = kallsyms_on_each_symbol(klp_verify_callback, &args);
+ mutex_unlock(&module_mutex);
- pr_err("symbol '%s' not found at specified address 0x%016lx, kernel mismatch?\n",
- name, addr);
- return -EINVAL;
+ if (!ret) {
+ pr_err("symbol '%s' not found at specified address 0x%016lx, kernel mismatch?\n",
+ name, addr);
+ return -EINVAL;
+ }
+
+ return 0;
}
static int klp_find_verify_func_addr(struct klp_object *obj,