Messages in this thread | | | Date | Fri, 20 Nov 2020 11:44:12 -0500 | From | Alan Stern <> | Subject | Printk specifiers for __user pointers |
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To the VSPRINTF maintainers:
Documentation/core-api/printk-formats.rst lists a large number of format specifiers for pointers of various sorts. Yet as far as I can see, there is no specifier meant for use with __user pointers.
The security implications of printing the true, unmangled value of a __user pointer are minimal, since doing so does not leak any kernel information. So %px would work, but tools like checkpatch.pl don't like it.
Should a new specifier be added? If not, should we simply use %px?
Alan Stern
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