In case of func->state or func->old_addr not having expected values, we'd rather bail out immediately from klp_disable_func(). This can't really happen with the current codebase, but fix this anyway in the sake of robustness. [jkosina@suse.com: reworded the changelog a bit] Signed-off-by: Minfei Huang <mnfhuang@gmail.com> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.com>
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| @@ -348,8 +348,10 @@ static void klp_disable_func(struct klp_func *func) · 347 unmodified lines | |||
| 348 | { | 348 | { |
| 349 | struct klp_ops *ops; | 349 | struct klp_ops *ops; |
| 350 | 350 | ||
| 351 | WARN_ON(func->state != KLP_ENABLED); | 351 | if (WARN_ON(func->state != KLP_ENABLED)) |
| 352 | WARN_ON(!func->old_addr); | 352 | return; |
| 353 | if (WARN_ON(!func->old_addr)) | ||
| 354 | return; | ||
| 353 | 355 | ||
| 354 | ops = klp_find_ops(func->old_addr); | 356 | ops = klp_find_ops(func->old_addr); |
| 355 | if (WARN_ON(!ops)) | 357 | if (WARN_ON(!ops)) |