Re: [PATCH] new setprocuid syscall

From: Alan Cox (
Date: Tue Feb 20 2001 - 08:52:03 EST

> Fair enough but could you explain the potential problems? And how is
> it different from sys_setpriority?

Suppose you change a tasks uid in parallel with the set of conditionals
in setuid - just as one example. Or you change uid _during_ a quota operation.
Or during sys5 ipc ops.

All of these and more make assumptions. The idea of locking uid changes with
semaphores would produce some truely horrible performance impacts

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This archive was generated by hypermail 2b29 : Fri Feb 23 2001 - 21:00:22 EST