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virt: acrn: replace deprecated strncpy with strscpy
strncpy() is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.
We can see that client->name should be NUL-terminated based on its usage
with a %s C-string format specifier.
| client->thread = kthread_run(ioreq_task, client, "VM%u-%s",
| client->vm->vmid, client->name);
NUL-padding is not required as client is already zero-allocated:
| client = kzalloc(sizeof(*client), GFP_KERNEL);
Considering the above, a suitable replacement is `strscpy` [2] due to
the fact that it guarantees NUL-termination on the destination buffer
without unnecessarily NUL-padding.
Note that this patch relies on the _new_ 2-argument version of strscpy()
introduced in Commit e6584c3964
("string: Allow 2-argument
strscpy()").
Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
Link: https://github.com/KSPP/linux/issues/90
Cc: <linux-hardening@vger.kernel.org>
Signed-off-by: Justin Stitt <justinstitt@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20240320-strncpy-drivers-virt-acrn-ioreq-c-v1-1-db6996770341@google.com
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
parent
2e431b23a1
commit
61af39e1e4
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@ -433,7 +433,7 @@ struct acrn_ioreq_client *acrn_ioreq_client_create(struct acrn_vm *vm,
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client->priv = priv;
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client->priv = priv;
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client->is_default = is_default;
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client->is_default = is_default;
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if (name)
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if (name)
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strncpy(client->name, name, sizeof(client->name) - 1);
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strscpy(client->name, name);
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rwlock_init(&client->range_lock);
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rwlock_init(&client->range_lock);
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INIT_LIST_HEAD(&client->range_list);
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INIT_LIST_HEAD(&client->range_list);
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init_waitqueue_head(&client->wq);
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init_waitqueue_head(&client->wq);
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