Re: cvs commit: src/sys/kern kern_sysctl.c
On 5 Oct, Bruce M Simpson wrote:
> bms 2003/10/05 02:37:47 PDT
> FreeBSD src repository
> Modified files:
> sys/kern kern_sysctl.c
> Fix a security problem in sysctl() the long way round.
> Use pre-emption detection to avoid the need for wiring a userland buffer
> when copying opaque data structures.
> sysctl_wire_old_buffer() is now a no-op. Other consumers of this
> API should use pre-emption detection to notice update collisions.
There are a number of consumers of sysctl_wire_old_buffer() that use it
to avoid blocking while holding a mutex. In general they call
SYSCTL_OUT() multiple times while traversing a data structure. They
probably should have been fixed before neutering
Received on Sun Oct 05 2003 - 03:41:24 UTC