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livepatch: Fix missing unlock on error in klp_enable_patch()

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Add missing unlock when try_module_get() fails in klp_enable_patch().

Fixes: 5ef3dd2055 ("livepatch: Fix kobject refcount bug on klp_init_patch_early failure path")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Acked-by: David Vernet <void@manifault.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20211225025115.475348-1-yangyingliang@huawei.com
This commit is contained in:
Yang Yingliang 2021-12-25 10:51:15 +08:00 committed by Petr Mladek
parent 5ef3dd2055
commit 50a0f3f55e
1 changed files with 3 additions and 1 deletions
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4
kernel/livepatch/core.c
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@ -1047,8 +1047,10 @@ int klp_enable_patch(struct klp_patch *patch)
return -EINVAL;
}
if (!try_module_get(patch->mod))
if (!try_module_get(patch->mod)) {
mutex_unlock(&klp_mutex);
return -ENODEV;
}
klp_init_patch_early(patch);