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| author |   David Howells <dhowells@redhat.com> | 2009-05-08 13:55:27 +0100 |
|---|---|---|
| committer |   James Morris <jmorris@namei.org> | 2009-05-11 08:15:39 +1000 |
| commit | 107db7c7dd137aeb7361b8c2606ac936c0be58ff (patch) | |
| tree | 7e8e024bbed52ac111a0b2ac878da1a95752c28b /security | |
| parent | CRED: Rename cred_exec_mutex to reflect that it's a guard against ptrace (diff) | |
| download | linux-dev-107db7c7dd137aeb7361b8c2606ac936c0be58ff.tar.xz linux-dev-107db7c7dd137aeb7361b8c2606ac936c0be58ff.zip | |
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')
0 files changed, 0 insertions, 0 deletions