Messages in this thread | | | Date | Fri, 08 Jun 2007 06:38:20 +0200 | From | Eric Dumazet <> | Subject | Re: [patch 7/8] fdmap v2 - implement sys_socket2 |
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Davide Libenzi a écrit : > On Thu, 7 Jun 2007, Eric Dumazet wrote: >> I am afraid randomization wont really work if /sbin/init or /bin/bash for >> example uses one (or more) unseq fd : >> The 'random base' will be propagated at fork()/exec() time ? > > As I said to Uli, we can't move the base while fds are in there. We can > re-randomize it when it's empty. This can also be done (it's a trivial and > fast operation - just set fmap->base to a new value) even every time the > fd count on the map touches zero. >
Hum, I think it would be better to free fmap if it's empty, instead of change fmap->base. (Only in fork() after removal of O_CLOFORK file handles, and in exec() after removal of O_CLOEXEC file handles)
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