From f867d2a2e5f3f0ce6356f452cc27b70d577de7c7 Mon Sep 17 00:00:00 2001 From: Jesper Juhl Date: Sun, 25 Jun 2006 05:47:09 -0700 Subject: [PATCH] ensure NULL deref can't possibly happen in is_exported() If CONFIG_KALLSYMS is defined and if it should happen that is_exported() is given a NULL 'mod' and lookup_symbol(name, __start___ksymtab, __stop___ksymtab) returns 0, then we'll end up dereferencing a NULL pointer. Signed-off-by: Jesper Juhl Cc: Rusty Russell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/module.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/module.c b/kernel/module.c index bbe04862e1b0..d75275de1c28 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -1326,7 +1326,7 @@ int is_exported(const char *name, const struct module *mod) if (!mod && lookup_symbol(name, __start___ksymtab, __stop___ksymtab)) return 1; else - if (lookup_symbol(name, mod->syms, mod->syms + mod->num_syms)) + if (mod && lookup_symbol(name, mod->syms, mod->syms + mod->num_syms)) return 1; else return 0; -- cgit v1.2.3