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[PATCH] ensure NULL deref can't possibly happen in is_exported()

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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 <jesper.juhl@gmail.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jesper Juhl 2006-06-25 05:47:09 -07:00 committed by Linus Torvalds
parent 5474c120aa
commit f867d2a2e5
1 changed files with 1 additions and 1 deletions
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2
kernel/module.c
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@ -1326,7 +1326,7 @@ int is_exported(const char *name, const struct module *mod)
if (!mod && lookup_symbol(name, __start___ksymtab, __stop___ksymtab)) if (!mod && lookup_symbol(name, __start___ksymtab, __stop___ksymtab))
return 1; return 1;
else 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; return 1;
else else
return 0; return 0;