diff options
| author | Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> | 2008-10-29 14:01:11 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-01-24 16:36:23 -0800 |
| commit | 0cbb746bbeca35376d6ab56196271a827fadf55e (patch) | |
| tree | da92e77f5ec7888b02e728bf7da04b727c836ca3 | |
| parent | e377565b19b465b307c7924438b768517dab8a6a (diff) | |
'kill sig -1' must only apply to caller's namespace
commit d25141a818383b3c3b09f065698c544a7a0ec6e7 upstream.
Currently "kill <sig> -1" kills processes in all namespaces and breaks the
isolation of namespaces. Earlier attempt to fix this was discussed at:
http://lkml.org/lkml/2008/7/23/148
As suggested by Oleg Nesterov in that thread, use "task_pid_vnr() > 1"
check since task_pid_vnr() returns 0 if process is outside the caller's
namespace.
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Tested-by: Daniel Hokka Zakrisson <daniel@hozac.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | kernel/signal.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index 6f06f431bd8..3d161f0025c 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1141,7 +1141,8 @@ static int kill_something_info(int sig, struct siginfo *info, pid_t pid) struct task_struct * p; for_each_process(p) { - if (p->pid > 1 && !same_thread_group(p, current)) { + if (task_pid_vnr(p) > 1 && + !same_thread_group(p, current)) { int err = group_send_sig_info(sig, info, p); ++count; if (err != -EPERM) |