Cc: lkml <linux-kernel@...>, <linux-security-module@...>, Andrew Morgan <morgan@...>, Stephen Smalley <sds@...>, Mike Galbraith <efault@...>, <buraphalinuxserver@...>, <elendil@...>
Em Thu, 28 Feb 2008 11:38:17 -0600
serge@hallyn.com escreveu:
| The original justification for cap_task_kill() was as follows:
|
| check_kill_permission() does appropriate uid equivalence checks.
| However with file capabilities it becomes possible for an
| unprivileged user to execute a file with file capabilities
| resulting in a more privileged task with the same uid.
|
| However now that cap_task_kill() always returns 0 (permission
| granted) when p->uid==current->uid, the whole hook is worthless,
| and only likely to create more subtle problems in the corner cases
| where it might still be called but return -EPERM. Those cases
| are basically when uids are different but euid/suid is equivalent
| as per the check in check_kill_permission().
|
| This patch removes cap_task_kill().
2.6.24 seems to have the same bug, what about a rediff for it and
submit the patch to -stable team?
Thanks.
--
Luiz Fernando N. Capitulino
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