Messages in this thread | | | Date | Sat, 21 May 2022 23:07:52 -0700 | From | Christoph Hellwig <> | Subject | Re: [PATCH 0/5] kallsyms: make kallsym APIs more safe with scnprintf |
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On Fri, May 20, 2022 at 02:06:56PM +0530, Maninder Singh wrote: > kallsyms functionality depends on KSYM_NAME_LEN directly. > but if user passed array length lesser than it, sprintf > can cause issues of buffer overflow attack. > > So changing *sprint* and *lookup* APIs in this patch set > to have buffer size as an argument and replacing sprintf with > scnprintf.
This is still a pretty horrible API. Passing something like a struct seq_buf seems like the much better API here. Also with the amount of arguments and by reference passing it might be worth to pass them as a structure while you're at it.
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