Alejandro Colomar 379e9c32f7 lib/idmapping.c: Use long constants in prctl(2), and remove 0s ...

The prctl(2) system-call wrapper is implemented as a variadic function.
This makes it important to pass arguments to it of the right type (and
more importantly of the right width), to avoid undefined behavior.

While at it, check errors with ==-1, not <0, which is more explicit.

Also, PR_SET_KEEPCAPS(2const) doesn't need all arguments, so it can be
called with just two of them; remove unnecessary 0s.

See-also: prctl(2), PR_SET_KEEPCAPS(2const)
Link: <https://lore.kernel.org/linux-man/ddbdyaiptesjalgfmztxideej67e3yaob7ucsmbf6qvriwxiif@dohhxrqgwhrf/T/#med306b5b003f9cc7cc2de69fcdd7ee2d056d0954>
Cc: Xi Ruoyao <xry111@xry111.site>
Cc: Lukas Slebodnik <lslebodn@fedoraproject.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

2024-07-02 13:12:22 -05:00

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