kallsyms: Use bounded strnchr() when parsing string
When parsing for the <module:name> format, we use strchr() to look for
the separator, when we know that the module name can't be longer than
MODULE_NAME_LEN. Enforce the same using strnchr().
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Jessica Yu <jeyu@redhat.com>
diff --git a/kernel/module.c b/kernel/module.c
index 7eba6de..d3bd56e 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -4017,7 +4017,7 @@
/* Don't lock: we're in enough trouble already. */
preempt_disable();
- if ((colon = strchr(name, ':')) != NULL) {
+ if ((colon = strnchr(name, MODULE_NAME_LEN, ':')) != NULL) {
if ((mod = find_module_all(name, colon - name, false)) != NULL)
ret = mod_find_symname(mod, colon+1);
} else {