[PATCH] invalidate pointers right after pool_put()

[Mindaugas Rasiukevicius]

attached patch invalidates pointers right after pool_put().
I'm running a machine with this patch for several month
w/o any problems.
Is it ok to commit?

The kmem(9) and pool(9) subsystems already perform use-after-free checking
in debug/diagnostic kernels. I do not think there is a benefit in such patch,
and rtfree() part is especially ugly. What are you trying to solve?

[Manuel Bouyer]

Post by Mindaugas Rasiukevicius

attached patch invalidates pointers right after pool_put().
I'm running a machine with this patch for several month
w/o any problems.
Is it ok to commit?

The kmem(9) and pool(9) subsystems already perform use-after-free checking
in debug/diagnostic kernels. I do not think there is a benefit in such patch,

especially as in several place it zero out the local pointer but not
the one in the referencing structure or calling function, which is
more likely to perform a use after free than a local variable.