The patch titled
ptrace: do_notify_parent_cldstop: fix the wrong ->nsproxy usage
has been added to the -mm tree. Its filename is
ptrace-do_notify_parent_cldstop-fix-the-wrong-nsproxy-usage.patch
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------------------------------------------------------
Subject: ptrace: do_notify_parent_cldstop: fix the wrong ->nsproxy usage
From: Oleg Nesterov <oleg@xxxxxxxxxx>
If the non-traced sub-thread calls do_notify_parent_cldstop(), we send the
notification to group_leader->real_parent and we report group_leader's
pid.
But, if group_leader is traced we use the wrong ->parent->nsproxy->pid_ns,
the tracer and parent can live in different namespaces. Change the code
to use "parent" instead of tsk->parent.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Acked-by: Roland McGrath <roland@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/signal.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/signal.c~ptrace-do_notify_parent_cldstop-fix-the-wrong-nsproxy-usage kernel/signal.c
--- a/kernel/signal.c~ptrace-do_notify_parent_cldstop-fix-the-wrong-nsproxy-usage
+++ a/kernel/signal.c
@@ -1494,7 +1494,7 @@ static void do_notify_parent_cldstop(str
* see comment in do_notify_parent() abot the following 3 lines
*/
rcu_read_lock();
- info.si_pid = task_pid_nr_ns(tsk, tsk->parent->nsproxy->pid_ns);
+ info.si_pid = task_pid_nr_ns(tsk, parent->nsproxy->pid_ns);
info.si_uid = __task_cred(tsk)->uid;
rcu_read_unlock();
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
linux-next.patch
slow_work_thread-should-do-the-exclusive-wait.patch
rework-fix-is_single_threaded.patch
getrusage-fill-ru_maxrss-value.patch
allow_signal-kill-the-bogus-mm-check-add-a-note-about-clone_sighand.patch
ptrace-remove-pt_dtrace-from-arch-h8300.patch
ptrace-remove-pt_dtrace-from-avr32-mn10300-parisc-s390-sh-xtensa.patch
ptrace-remove-pt_dtrace-from-m68k-m68knommu.patch
ptrace-remove-pt_dtrace-from-arch-m32r.patch
ptrace-mm_need_new_owner-use-real_parent-to-search-in-the-siblings.patch
ptrace-tracehook_unsafe_exec-remove-the-stale-comment.patch
ptrace-tracehook_unsafe_exec-remove-the-stale-comment-fix.patch
ptrace-do-not-use-task-ptrace-directly-in-core-kernel.patch
ptrace-ptrace_attach-check-pf_kthread-exit_state-instead-of-mm.patch
ptrace-cleanup-check-set-of-pt_ptraced-during-attach.patch
ptrace-do-not-use-task_lock-for-attach.patch
ptrace_get_task_struct-s-tasklist-rcu-make-it-static.patch
ptrace-wait_task_zombie-s-parent-real_parent.patch
ptrace-do_notify_parent_cldstop-fix-the-wrong-nsproxy-usage.patch
signals-tracehook_notify_jctl-change.patch
utrace-core.patch
copy_process-remove-the-unneeded-clear_tsk_thread_flagtif_sigpending.patch
elf_core_dump-use-rcu_read_lock-to-access-real_parent.patch
shift-ptrace-implies-wuntraced-from-ptrace_do_wait-to-wait_task_stopped.patch
introduce-struct-wait_opts-to-simplify-do_wait-pathes.patch
do_wait-simplify-retval-tsk_result-notask_error-mess.patch
do_wait-kill-the-old-bug_on-use-while_each_thread.patch
do_wait-fix-the-theoretical-race-with-stop-trace-cont.patch
mm-exitc-reorder-wait_opts-to-remove-padding-on-64-bit-builds.patch
wait_task_-cleanups-split-wait_noreap_copyout.patch
wait_task_-cleanups-use-copy_wait_opts_to_user-in-wait_task_stopped.patch
wait_task_-cleanups-use-copy_wait_opts_to_user-in-do_wait.patch
wait_task_-cleanups-use-copy_wait_opts_to_user-in-wait_task_zombie.patch
wait_task_-cleanups-use-copy_wait_opts_to_user-in-wait_task_continued.patch
kthreads-simplify-the-startup-synchronization.patch
kthreads-rework-kthread_stop.patch
kthreads-simplify-migration_thread-exit-path.patch
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