From: "Eric W. Biederman" <ebiederm@xmission.com>
To: linux-kernel@vger.kernel.org
Cc: rjw@rjwysocki.net, Oleg Nesterov <oleg@redhat.com>,
mingo@kernel.org, vincent.guittot@linaro.org,
dietmar.eggemann@arm.com, rostedt@goodmis.org, mgorman@suse.de,
bigeasy@linutronix.de, Will Deacon <will@kernel.org>,
tj@kernel.org, linux-pm@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Richard Weinberger <richard@nod.at>,
Anton Ivanov <anton.ivanov@cambridgegreys.com>,
Johannes Berg <johannes@sipsolutions.net>,
linux-um@lists.infradead.org, Chris Zankel <chris@zankel.net>,
Max Filippov <jcmvbkbc@gmail.com>,
linux-xtensa@linux-xtensa.org, Kees Cook <keescook@chromium.org>,
Jann Horn <jannh@google.com>,
linux-ia64@vger.kernel.org,
"Eric W. Biederman" <ebiederm@xmission.com>
Subject: [PATCH v4 10/12] ptrace: Don't change __state
Date: Thu, 5 May 2022 13:26:43 -0500 [thread overview]
Message-ID: <20220505182645.497868-10-ebiederm@xmission.com> (raw)
In-Reply-To: <87a6bv6dl6.fsf_-_@email.froward.int.ebiederm.org>
Stop playing with tsk->__state to remove TASK_WAKEKILL while a ptrace
command is executing.
Instead remove TASK_WAKEKILL from the definition of TASK_TRACED, and
implement a new jobctl flag TASK_PTRACE_FROZEN. This new flag is set
in jobctl_freeze_task and cleared when ptrace_stop is awoken or in
jobctl_unfreeze_task (when ptrace_stop remains asleep).
In signal_wake_up add __TASK_TRACED to state along with TASK_WAKEKILL
when the wake up is for a fatal signal. Skip adding __TASK_TRACED
when TASK_PTRACE_FROZEN is not set. This has the same effect as
changing TASK_TRACED to __TASK_TRACED as all of the wake_ups that use
TASK_KILLABLE go through signal_wake_up.
Handle a ptrace_stop being called with a pending fatal signal.
Previously it would have been handled by schedule simply failing to
sleep. As TASK_WAKEKILL is no longer part of TASK_TRACED schedule
will sleep with a fatal_signal_pending. The code in signal_wake_up
guarantees that the code will be awaked by any fatal signal that
codes after TASK_TRACED is set.
Previously the __state value of __TASK_TRACED was changed to
TASK_RUNNING when woken up or back to TASK_TRACED when the code was
left in ptrace_stop. Now when woken up ptrace_stop now clears
JOBCTL_PTRACE_FROZEN and when left sleeping ptrace_unfreezed_traced
clears JOBCTL_PTRACE_FROZEN.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
include/linux/sched.h | 2 +-
include/linux/sched/jobctl.h | 2 ++
include/linux/sched/signal.h | 5 +++--
kernel/ptrace.c | 21 ++++++++-------------
kernel/sched/core.c | 5 +----
kernel/signal.c | 14 ++++++--------
6 files changed, 21 insertions(+), 28 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index d5e3c00b74e1..610f2fdb1e2c 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -103,7 +103,7 @@ struct task_group;
/* Convenience macros for the sake of set_current_state: */
#define TASK_KILLABLE (TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)
#define TASK_STOPPED (TASK_WAKEKILL | __TASK_STOPPED)
-#define TASK_TRACED (TASK_WAKEKILL | __TASK_TRACED)
+#define TASK_TRACED __TASK_TRACED
#define TASK_IDLE (TASK_UNINTERRUPTIBLE | TASK_NOLOAD)
diff --git a/include/linux/sched/jobctl.h b/include/linux/sched/jobctl.h
index fa067de9f1a9..d556c3425963 100644
--- a/include/linux/sched/jobctl.h
+++ b/include/linux/sched/jobctl.h
@@ -19,6 +19,7 @@ struct task_struct;
#define JOBCTL_TRAPPING_BIT 21 /* switching to TRACED */
#define JOBCTL_LISTENING_BIT 22 /* ptracer is listening for events */
#define JOBCTL_TRAP_FREEZE_BIT 23 /* trap for cgroup freezer */
+#define JOBCTL_PTRACE_FROZEN_BIT 24 /* frozen for ptrace */
#define JOBCTL_STOP_DEQUEUED (1UL << JOBCTL_STOP_DEQUEUED_BIT)
#define JOBCTL_STOP_PENDING (1UL << JOBCTL_STOP_PENDING_BIT)
@@ -28,6 +29,7 @@ struct task_struct;
#define JOBCTL_TRAPPING (1UL << JOBCTL_TRAPPING_BIT)
#define JOBCTL_LISTENING (1UL << JOBCTL_LISTENING_BIT)
#define JOBCTL_TRAP_FREEZE (1UL << JOBCTL_TRAP_FREEZE_BIT)
+#define JOBCTL_PTRACE_FROZEN (1UL << JOBCTL_PTRACE_FROZEN_BIT)
#define JOBCTL_TRAP_MASK (JOBCTL_TRAP_STOP | JOBCTL_TRAP_NOTIFY)
#define JOBCTL_PENDING_MASK (JOBCTL_STOP_PENDING | JOBCTL_TRAP_MASK)
diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index 3c8b34876744..e66948abbee4 100644
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -435,9 +435,10 @@ extern void calculate_sigpending(void);
extern void signal_wake_up_state(struct task_struct *t, unsigned int state);
-static inline void signal_wake_up(struct task_struct *t, bool resume)
+static inline void signal_wake_up(struct task_struct *t, bool fatal)
{
- signal_wake_up_state(t, resume ? TASK_WAKEKILL : 0);
+ fatal = fatal && !(t->jobctl & JOBCTL_PTRACE_FROZEN);
+ signal_wake_up_state(t, fatal ? TASK_WAKEKILL | __TASK_TRACED : 0);
}
static inline void ptrace_signal_wake_up(struct task_struct *t, bool resume)
{
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 05953ac9f7bd..83ed28262708 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -197,7 +197,7 @@ static bool ptrace_freeze_traced(struct task_struct *task)
spin_lock_irq(&task->sighand->siglock);
if (task_is_traced(task) && !looks_like_a_spurious_pid(task) &&
!__fatal_signal_pending(task)) {
- WRITE_ONCE(task->__state, __TASK_TRACED);
+ task->jobctl |= JOBCTL_PTRACE_FROZEN;
ret = true;
}
spin_unlock_irq(&task->sighand->siglock);
@@ -207,23 +207,19 @@ static bool ptrace_freeze_traced(struct task_struct *task)
static void ptrace_unfreeze_traced(struct task_struct *task)
{
- if (READ_ONCE(task->__state) != __TASK_TRACED)
- return;
-
- WARN_ON(!task->ptrace || task->parent != current);
+ unsigned long flags;
/*
- * PTRACE_LISTEN can allow ptrace_trap_notify to wake us up remotely.
- * Recheck state under the lock to close this race.
+ * The child may be awake and may have cleared
+ * JOBCTL_PTRACE_FROZEN (see ptrace_resume). The child will
+ * not set JOBCTL_PTRACE_FROZEN or enter __TASK_TRACED anew.
*/
- spin_lock_irq(&task->sighand->siglock);
- if (READ_ONCE(task->__state) == __TASK_TRACED) {
+ if (lock_task_sighand(task, &flags)) {
+ task->jobctl &= ~JOBCTL_PTRACE_FROZEN;
if (__fatal_signal_pending(task))
wake_up_state(task, __TASK_TRACED);
- else
- WRITE_ONCE(task->__state, TASK_TRACED);
+ unlock_task_sighand(task, &flags);
}
- spin_unlock_irq(&task->sighand->siglock);
}
/**
@@ -256,7 +252,6 @@ static int ptrace_check_attach(struct task_struct *child, bool ignore_state)
*/
read_lock(&tasklist_lock);
if (child->ptrace && child->parent == current) {
- WARN_ON(READ_ONCE(child->__state) == __TASK_TRACED);
/*
* child->sighand can't be NULL, release_task()
* does ptrace_unlink() before __exit_signal().
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index d575b4914925..3c351707e830 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6304,10 +6304,7 @@ static void __sched notrace __schedule(unsigned int sched_mode)
/*
* We must load prev->state once (task_struct::state is volatile), such
- * that:
- *
- * - we form a control dependency vs deactivate_task() below.
- * - ptrace_{,un}freeze_traced() can change ->state underneath us.
+ * that we form a control dependency vs deactivate_task() below.
*/
prev_state = READ_ONCE(prev->__state);
if (!(sched_mode & SM_MASK_PREEMPT) && prev_state) {
diff --git a/kernel/signal.c b/kernel/signal.c
index d2d0c753156c..a58b68a2d3c6 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2209,14 +2209,12 @@ static int ptrace_stop(int exit_code, int why, unsigned long message,
}
/*
- * schedule() will not sleep if there is a pending signal that
- * can awaken the task.
- *
- * After this point ptrace_signal_wake_up will clear TASK_TRACED
- * if ptrace_unlink happens. Handle previous ptrace_unlinks
- * here to prevent ptrace_stop sleeping in schedule.
+ * After this point ptrace_signal_wake_up or signal_wake_up
+ * will clear TASK_TRACED if ptrace_unlink happens or a fatal
+ * signal comes in. Handle previous ptrace_unlinks and fatal
+ * signals here to prevent ptrace_stop sleeping in schedule.
*/
- if (!current->ptrace)
+ if (!current->ptrace || __fatal_signal_pending(current))
return exit_code;
set_special_state(TASK_TRACED);
@@ -2305,7 +2303,7 @@ static int ptrace_stop(int exit_code, int why, unsigned long message,
current->exit_code = 0;
/* LISTENING can be set only during STOP traps, clear it */
- current->jobctl &= ~JOBCTL_LISTENING;
+ current->jobctl &= ~(JOBCTL_LISTENING | JOBCTL_PTRACE_FROZEN);
/*
* Queued signals ignored us while we were stopped for tracing.
--
2.35.3
next prev parent reply other threads:[~2022-05-05 18:36 UTC|newest]
Thread overview: 240+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-21 15:02 [PATCH v2 0/5] ptrace-vs-PREEMPT_RT and freezer rewrite Peter Zijlstra
2022-04-21 15:02 ` [PATCH v2 1/5] sched,signal,ptrace: Rework TASK_TRACED, TASK_STOPPED state Peter Zijlstra
2022-04-26 23:34 ` Eric W. Biederman
2022-04-28 10:00 ` Peter Zijlstra
2022-04-21 15:02 ` [PATCH v2 2/5] sched,ptrace: Fix ptrace_check_attach() vs PREEMPT_RT Peter Zijlstra
2022-04-21 18:23 ` Oleg Nesterov
2022-04-21 19:58 ` Peter Zijlstra
2022-04-21 18:40 ` Eric W. Biederman
2022-04-26 22:50 ` [PATCH 0/9] ptrace: cleaning up ptrace_stop Eric W. Biederman
2022-04-26 22:52 ` [PATCH 1/9] signal: Rename send_signal send_signal_locked Eric W. Biederman
2022-04-28 10:27 ` Peter Zijlstra
2022-04-26 22:52 ` [PATCH 2/9] signal: Replace __group_send_sig_info with send_signal_locked Eric W. Biederman
2022-04-26 22:52 ` [PATCH 3/9] ptrace/um: Replace PT_DTRACE with TIF_SINGLESTEP Eric W. Biederman
2022-04-27 7:10 ` Johannes Berg
2022-04-27 13:50 ` Eric W. Biederman
2022-04-26 22:52 ` [PATCH 4/9] ptrace/xtensa: Replace PT_SINGLESTEP " Eric W. Biederman
2022-04-26 23:33 ` Max Filippov
2022-04-26 22:52 ` [PATCH 5/9] signal: Protect parent child relationships by childs siglock Eric W. Biederman
2022-04-27 6:40 ` Sebastian Andrzej Siewior
2022-04-27 13:35 ` Eric W. Biederman
2022-04-26 22:52 ` [PATCH 6/9] signal: Always call do_notify_parent_cldstop with siglock held Eric W. Biederman
2022-04-27 14:10 ` Oleg Nesterov
2022-04-27 14:20 ` Eric W. Biederman
2022-04-27 14:43 ` Oleg Nesterov
2022-04-27 14:47 ` Eric W. Biederman
2022-04-28 17:44 ` Peter Zijlstra
2022-04-28 18:22 ` Oleg Nesterov
2022-04-28 18:37 ` Eric W. Biederman
2022-04-28 20:49 ` Eric W. Biederman
2022-04-28 22:19 ` Peter Zijlstra
2022-04-27 14:56 ` Oleg Nesterov
2022-04-27 15:00 ` Oleg Nesterov
2022-04-27 21:52 ` Eric W. Biederman
2022-04-28 10:38 ` Peter Zijlstra
2022-04-26 22:52 ` [PATCH 7/9] ptrace: Simplify the wait_task_inactive call in ptrace_check_attach Eric W. Biederman
2022-04-27 13:42 ` Eric W. Biederman
2022-04-27 14:27 ` Eric W. Biederman
2022-04-27 15:14 ` Oleg Nesterov
2022-04-28 10:42 ` Peter Zijlstra
2022-04-28 11:19 ` Oleg Nesterov
2022-04-28 13:54 ` Peter Zijlstra
2022-04-28 14:57 ` Oleg Nesterov
2022-04-28 16:09 ` Peter Zijlstra
2022-04-28 16:19 ` Oleg Nesterov
2022-04-26 22:52 ` [PATCH 8/9] ptrace: Use siglock instead of tasklist_lock " Eric W. Biederman
2022-04-27 15:20 ` Oleg Nesterov
2022-04-26 22:52 ` [PATCH 9/9] ptrace: Don't change __state Eric W. Biederman
2022-04-27 15:41 ` Oleg Nesterov
2022-04-27 22:35 ` Eric W. Biederman
2022-04-27 16:09 ` Oleg Nesterov
2022-04-27 16:33 ` Eric W. Biederman
2022-04-27 17:18 ` Oleg Nesterov
2022-04-27 17:21 ` Oleg Nesterov
2022-04-27 17:31 ` Eric W. Biederman
2022-04-27 23:05 ` Eric W. Biederman
2022-04-28 15:11 ` Oleg Nesterov
2022-04-28 16:50 ` Eric W. Biederman
2022-04-28 18:53 ` Oleg Nesterov
2022-04-28 10:07 ` [PATCH 0/9] ptrace: cleaning up ptrace_stop Peter Zijlstra
2022-04-29 21:46 ` [PATCH 0/12] " Eric W. Biederman
2022-04-29 21:48 ` [PATCH v2 01/12] signal: Rename send_signal send_signal_locked Eric W. Biederman
2022-05-02 7:50 ` Sebastian Andrzej Siewior
2022-04-29 21:48 ` [PATCH v2 02/12] signal: Replace __group_send_sig_info with send_signal_locked Eric W. Biederman
2022-05-02 7:58 ` Sebastian Andrzej Siewior
2022-04-29 21:48 ` [PATCH v2 03/12] ptrace/um: Replace PT_DTRACE with TIF_SINGLESTEP Eric W. Biederman
2022-04-29 21:48 ` [PATCH v2 04/12] ptrace/xtensa: Replace PT_SINGLESTEP " Eric W. Biederman
2022-04-29 21:48 ` [PATCH v2 05/12] signal: Use lockdep_assert_held instead of assert_spin_locked Eric W. Biederman
2022-04-29 21:48 ` [PATCH v2 06/12] ptrace: Reimplement PTRACE_KILL by always sending SIGKILL Eric W. Biederman
2022-05-02 14:37 ` Oleg Nesterov
2022-05-03 19:36 ` Eric W. Biederman
2022-04-29 21:48 ` [PATCH v2 07/12] ptrace: Don't change __state Eric W. Biederman
2022-04-29 22:27 ` Peter Zijlstra
2022-05-02 8:59 ` Sebastian Andrzej Siewior
2022-05-02 15:39 ` Oleg Nesterov
2022-05-02 16:35 ` Eric W. Biederman
2022-05-03 13:41 ` Oleg Nesterov
2022-05-03 20:45 ` Eric W. Biederman
2022-05-04 14:02 ` Oleg Nesterov
2022-05-04 17:37 ` Eric W. Biederman
2022-05-04 18:28 ` Eric W. Biederman
2022-05-02 15:47 ` Oleg Nesterov
2022-04-29 21:48 ` [PATCH v2 08/12] ptrace: Remove arch_ptrace_attach Eric W. Biederman
2022-04-29 21:48 ` [PATCH v2 09/12] ptrace: Always take siglock in ptrace_resume Eric W. Biederman
2022-04-29 21:48 ` [PATCH v2 10/12] ptrace: Only return signr from ptrace_stop if it was provided Eric W. Biederman
2022-05-02 10:08 ` Sebastian Andrzej Siewior
2022-04-29 21:48 ` [PATCH v2 11/12] ptrace: Always call schedule in ptrace_stop Eric W. Biederman
2022-04-29 21:48 ` [PATCH v2 12/12] sched,signal,ptrace: Rework TASK_TRACED, TASK_STOPPED state Eric W. Biederman
2022-05-02 10:18 ` Sebastian Andrzej Siewior
2022-05-02 13:38 ` [PATCH 0/12] ptrace: cleaning up ptrace_stop Sebastian Andrzej Siewior
2022-05-04 22:39 ` [PATCH v3 0/11] " Eric W. Biederman
2022-05-04 22:40 ` [PATCH v3 01/11] signal: Rename send_signal send_signal_locked Eric W. Biederman
2022-05-04 22:40 ` [PATCH v3 02/11] signal: Replace __group_send_sig_info with send_signal_locked Eric W. Biederman
2022-05-04 22:40 ` [PATCH v3 03/11] ptrace/um: Replace PT_DTRACE with TIF_SINGLESTEP Eric W. Biederman
2022-05-04 22:40 ` [PATCH v3 04/11] ptrace/xtensa: Replace PT_SINGLESTEP " Eric W. Biederman
2022-05-04 22:40 ` [PATCH v3 05/11] ptrace: Remove arch_ptrace_attach Eric W. Biederman
2022-05-04 22:40 ` [PATCH v3 06/11] signal: Use lockdep_assert_held instead of assert_spin_locked Eric W. Biederman
2022-05-04 22:40 ` [PATCH v3 07/11] ptrace: Reimplement PTRACE_KILL by always sending SIGKILL Eric W. Biederman
2022-05-04 22:40 ` [PATCH v3 08/11] ptrace: Admit ptrace_stop can generate spuriuos SIGTRAPs Eric W. Biederman
2022-05-05 14:57 ` Oleg Nesterov
2022-05-05 16:59 ` Eric W. Biederman
2022-05-05 15:01 ` Oleg Nesterov
2022-05-05 17:21 ` Eric W. Biederman
2022-05-05 17:27 ` Oleg Nesterov
2022-05-05 15:28 ` Oleg Nesterov
2022-05-05 17:53 ` Eric W. Biederman
2022-05-05 18:10 ` Oleg Nesterov
2022-05-04 22:40 ` [PATCH v3 09/11] ptrace: Don't change __state Eric W. Biederman
2022-05-05 12:50 ` Sebastian Andrzej Siewior
2022-05-05 16:48 ` Eric W. Biederman
2022-05-04 22:40 ` [PATCH v3 10/11] ptrace: Always take siglock in ptrace_resume Eric W. Biederman
2022-05-04 22:40 ` [PATCH v3 11/11] sched,signal,ptrace: Rework TASK_TRACED, TASK_STOPPED state Eric W. Biederman
2022-05-05 18:25 ` [PATCH v4 0/12] ptrace: cleaning up ptrace_stop Eric W. Biederman
2022-05-05 18:26 ` [PATCH v4 01/12] signal: Rename send_signal send_signal_locked Eric W. Biederman
2022-05-05 18:26 ` [PATCH v4 02/12] signal: Replace __group_send_sig_info with send_signal_locked Eric W. Biederman
2022-05-05 18:26 ` [PATCH v4 03/12] ptrace/um: Replace PT_DTRACE with TIF_SINGLESTEP Eric W. Biederman
2022-05-05 18:26 ` [PATCH v4 04/12] ptrace/xtensa: Replace PT_SINGLESTEP " Eric W. Biederman
2022-05-05 18:26 ` [PATCH v4 05/12] ptrace: Remove arch_ptrace_attach Eric W. Biederman
2022-05-05 18:26 ` [PATCH v4 06/12] signal: Use lockdep_assert_held instead of assert_spin_locked Eric W. Biederman
2022-05-05 18:26 ` [PATCH v4 07/12] ptrace: Reimplement PTRACE_KILL by always sending SIGKILL Eric W. Biederman
2022-05-05 18:26 ` [PATCH v4 08/12] ptrace: Document that wait_task_inactive can't fail Eric W. Biederman
2022-05-06 6:55 ` Sebastian Andrzej Siewior
2022-05-05 18:26 ` [PATCH v4 09/12] ptrace: Admit ptrace_stop can generate spuriuos SIGTRAPs Eric W. Biederman
2022-05-05 18:26 ` Eric W. Biederman [this message]
2022-05-06 15:09 ` [PATCH v4 10/12] ptrace: Don't change __state Oleg Nesterov
2022-05-06 19:42 ` Eric W. Biederman
2022-05-10 14:23 ` Oleg Nesterov
2022-05-10 15:17 ` Eric W. Biederman
2022-05-10 15:34 ` Oleg Nesterov
2022-05-05 18:26 ` [PATCH v4 11/12] ptrace: Always take siglock in ptrace_resume Eric W. Biederman
2022-05-05 18:26 ` [PATCH v4 12/12] sched,signal,ptrace: Rework TASK_TRACED, TASK_STOPPED state Eric W. Biederman
2022-06-21 13:00 ` Alexander Gordeev
2022-06-21 14:02 ` Eric W. Biederman
2022-06-21 15:15 ` Alexander Gordeev
2022-06-21 17:47 ` Eric W. Biederman
2022-06-25 16:34 ` Eric W. Biederman
2022-06-28 18:36 ` Alexander Gordeev
2022-06-28 22:42 ` Eric W. Biederman
2022-06-28 22:48 ` Steven Rostedt
2022-06-29 3:39 ` Eric W. Biederman
2022-06-29 20:25 ` Alexander Gordeev
2022-07-05 15:44 ` Peter Zijlstra
2022-07-06 6:56 ` Alexander Gordeev
2022-06-28 23:15 ` Steven Rostedt
2022-07-05 13:47 ` Sven Schnelle
2022-07-05 17:28 ` Sven Schnelle
2022-07-05 19:25 ` Peter Zijlstra
2022-07-06 7:58 ` Sven Schnelle
2022-07-06 8:59 ` Peter Zijlstra
2022-07-06 9:27 ` Sven Schnelle
2022-07-06 10:11 ` Peter Zijlstra
2022-05-06 14:14 ` [PATCH v4 0/12] ptrace: cleaning up ptrace_stop Oleg Nesterov
2022-05-06 14:38 ` Eric W. Biederman
2022-05-06 21:26 ` Kees Cook
2022-05-06 21:59 ` Eric W. Biederman
2022-05-10 14:11 ` Oleg Nesterov
2022-05-10 14:26 ` Eric W. Biederman
2022-05-10 14:45 ` Sebastian Andrzej Siewior
2022-05-10 15:18 ` Eric W. Biederman
2022-05-11 20:00 ` Eric W. Biederman
2022-05-18 22:49 ` [PATCH 00/16] ptrace: cleanups and calling do_cldstop with only siglock Eric W. Biederman
2022-05-18 22:53 ` [PATCH 01/16] signal/alpha: Remove unused definition of TASK_REAL_PARENT Eric W. Biederman
2022-05-18 22:53 ` [PATCH 02/16] signal/ia64: Remove unused definition of IA64_TASK_REAL_PARENT_OFFSET Eric W. Biederman
2022-05-18 22:53 ` [PATCH 03/16] kdb: Use real_parent when displaying a list of processes Eric W. Biederman
2022-05-19 7:56 ` Peter Zijlstra
2022-05-19 18:06 ` Eric W. Biederman
2022-05-19 20:52 ` Doug Anderson
2022-05-19 23:48 ` Eric W. Biederman
2022-05-20 23:01 ` Doug Anderson
2022-05-18 22:53 ` [PATCH 04/16] powerpc/xmon: " Eric W. Biederman
2022-05-18 22:53 ` [PATCH 05/16] ptrace: Remove dead code from __ptrace_detach Eric W. Biederman
2022-05-24 11:42 ` Oleg Nesterov
2022-05-25 14:33 ` Oleg Nesterov
2022-06-06 16:06 ` Eric W. Biederman
2022-05-18 22:53 ` [PATCH 06/16] ptrace: Remove unnecessary locking in ptrace_(get|set)siginfo Eric W. Biederman
2022-05-24 13:25 ` Oleg Nesterov
2022-05-18 22:53 ` [PATCH 07/16] signal: Wake up the designated parent Eric W. Biederman
2022-05-24 13:25 ` Oleg Nesterov
2022-05-24 16:28 ` Oleg Nesterov
2022-05-25 14:28 ` Oleg Nesterov
2022-06-06 22:10 ` Eric W. Biederman
2022-06-07 15:26 ` Oleg Nesterov
2022-05-18 22:53 ` [PATCH 08/16] ptrace: Only populate last_siginfo from ptrace Eric W. Biederman
2022-05-24 15:27 ` Oleg Nesterov
2022-06-06 22:16 ` Eric W. Biederman
2022-06-07 15:29 ` Oleg Nesterov
2022-05-18 22:53 ` [PATCH 09/16] ptrace: In ptrace_setsiginfo deal with invalid si_signo Eric W. Biederman
2022-05-18 22:53 ` [PATCH 10/16] ptrace: In ptrace_signal look at what the debugger did with siginfo Eric W. Biederman
2022-05-18 22:53 ` [PATCH 11/16] ptrace: Use si_sino as the signal number to resume with Eric W. Biederman
2022-05-18 22:53 ` [PATCH 12/16] ptrace: Stop protecting ptrace_set_signr with tasklist_lock Eric W. Biederman
2022-05-18 22:53 ` [PATCH 13/16] ptrace: Document why ptrace_setoptions does not need a lock Eric W. Biederman
2022-05-18 22:53 ` [PATCH 14/16] signal: Protect parent child relationships by childs siglock Eric W. Biederman
2022-05-18 22:53 ` [PATCH 15/16] ptrace: Use siglock instead of tasklist_lock in ptrace_check_attach Eric W. Biederman
2022-05-18 22:53 ` [PATCH 16/16] signal: Always call do_notify_parent_cldstop with siglock held Eric W. Biederman
2022-05-20 16:19 ` kernel test robot
[not found] ` <CALWUPBdFDLuT7JaNGSJ_UXbHf8y9uKdC-SkAqzd=FQC0MX4nNQ@mail.gmail.com>
2022-05-19 6:19 ` [PATCH 00/16] ptrace: cleanups and calling do_cldstop with only siglock Sebastian Andrzej Siewior
2022-05-19 18:05 ` Eric W. Biederman
2022-05-20 5:24 ` Kyle Huey
2022-06-06 16:12 ` Eric W. Biederman
2022-06-09 19:59 ` Kyle Huey
2022-05-20 7:33 ` Sebastian Andrzej Siewior
2022-05-20 19:32 ` Eric W. Biederman
2022-05-20 19:58 ` Peter Zijlstra
2022-05-20 9:19 ` Sebastian Andrzej Siewior
2022-06-22 16:43 ` [PATCH 0/3] ptrace: Stop supporting SIGKILL for PTRACE_EVENT_EXIT Eric W. Biederman
2022-06-22 16:45 ` [PATCH 1/3] signal: Ensure SIGNAL_GROUP_EXIT gets set in do_group_exit Eric W. Biederman
2022-06-22 16:46 ` [PATCH 2/3] signal: Guarantee that SIGNAL_GROUP_EXIT is set on process exit Eric W. Biederman
2022-06-23 7:49 ` kernel test robot
2022-06-22 16:47 ` [PATCH 3/3] signal: Drop signals received after a fatal signal has been processed Eric W. Biederman
2022-06-23 15:12 ` [PATCH 0/3] ptrace: Stop supporting SIGKILL for PTRACE_EVENT_EXIT Alexander Gordeev
2022-06-23 21:55 ` Eric W. Biederman
2022-07-08 22:25 ` Eric W. Biederman
2022-07-08 23:22 ` Keno Fischer
2022-07-12 20:03 ` Eric W. Biederman
2022-07-16 21:29 ` Eric W. Biederman
2022-07-16 23:21 ` Kyle Huey
2022-04-25 14:35 ` [PATCH v2 2/5] sched,ptrace: Fix ptrace_check_attach() vs PREEMPT_RT Oleg Nesterov
2022-04-25 18:33 ` Peter Zijlstra
2022-04-26 0:38 ` Eric W. Biederman
2022-04-26 5:51 ` Oleg Nesterov
2022-04-26 17:19 ` Eric W. Biederman
2022-04-26 18:11 ` Oleg Nesterov
2022-04-25 17:47 ` Oleg Nesterov
2022-04-27 0:24 ` Eric W. Biederman
2022-04-28 20:29 ` Peter Zijlstra
2022-04-28 20:59 ` Oleg Nesterov
2022-04-28 22:21 ` Peter Zijlstra
2022-04-28 22:50 ` Oleg Nesterov
2022-04-27 15:53 ` Oleg Nesterov
2022-04-27 21:57 ` Eric W. Biederman
2022-04-21 15:02 ` [PATCH v2 3/5] freezer: Have {,un}lock_system_sleep() save/restore flags Peter Zijlstra
2022-04-21 15:02 ` [PATCH v2 4/5] freezer,umh: Clean up freezer/initrd interaction Peter Zijlstra
2022-04-21 15:02 ` [PATCH v2 5/5] freezer,sched: Rewrite core freezer logic Peter Zijlstra
2022-04-21 17:26 ` Eric W. Biederman
2022-04-21 17:57 ` Oleg Nesterov
2022-04-21 19:55 ` Peter Zijlstra
2022-04-21 20:07 ` Peter Zijlstra
2022-04-22 15:52 ` Eric W. Biederman
2022-04-22 17:43 ` [PATCH v2 0/5] ptrace-vs-PREEMPT_RT and freezer rewrite Sebastian Andrzej Siewior
2022-04-22 19:15 ` Eric W. Biederman
2022-04-22 21:13 ` Sebastian Andrzej Siewior
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