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authorDavid Howells <dhowells@redhat.com>2009-05-08 13:55:27 +0100
committerJames Morris <jmorris@namei.org>2009-05-11 08:15:39 +1000
commit107db7c7dd137aeb7361b8c2606ac936c0be58ff (patch)
tree7e8e024bbed52ac111a0b2ac878da1a95752c28b /security
parent5e751e992f3fb08ba35e1ca8095ec8fbf9eda523 (diff)
downloadlinux-107db7c7dd137aeb7361b8c2606ac936c0be58ff.tar.gz
CRED: Guard the setprocattr security hook against ptrace
Guard the setprocattr security hook against ptrace by taking the target task's cred_guard_mutex around it. The problem is that setprocattr() may otherwise note the lack of a debugger, and then perform an action on that basis whilst letting a debugger attach between the two points. Holding cred_guard_mutex across the test and the action prevents ptrace_attach() from doing that. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
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