Commit 17586188 authored Apr 23, 2017 by Naveen N. Rao Committed by Jessica Yu Apr 24, 2017

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>

parent 8ba4fcdf

kernel/module.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -4017,7 +4017,7 @@ unsigned long module_kallsyms_lookup_name(const char *name)

		/* 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 {