lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 22 May 2019 19:39:15 -0500
From:   "Eric W. Biederman" <>
Cc:     "Eric W. Biederman" <>,
        Linux Containers <>,
        Oleg Nesterov <>,
Subject: [REVIEW][PATCH 25/26] signal: Factor force_sig_info_to_task out of force_sig_info

All callers of force_sig_info pass info.si_signo in for the signal
by definition as well as in practice.

Further all callers of force_sig_info except force_sig_fault_to_task
pass current as the target task to force_sig_info.

Factor out a static force_sig_info_to_task that
force_sig_fault_to_task can call.

This prepares the way for force_sig_info to have it's task and signal
parameters removed.

Signed-off-by: "Eric W. Biederman" <>
 kernel/signal.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/kernel/signal.c b/kernel/signal.c
index d5f9ed5da9c5..0984158cd41a 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1294,12 +1294,13 @@ int do_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p
  * We don't want to have recursive SIGSEGV's etc, for example,
  * that is why we also clear SIGNAL_UNKILLABLE.
-force_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *t)
+static int
+force_sig_info_to_task(struct kernel_siginfo *info, struct task_struct *t)
 	unsigned long int flags;
 	int ret, blocked, ignored;
 	struct k_sigaction *action;
+	int sig = info->si_signo;
 	spin_lock_irqsave(&t->sighand->siglock, flags);
 	action = &t->sighand->action[sig-1];
@@ -1324,6 +1325,11 @@ force_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *t)
 	return ret;
+int force_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *t)
+	return force_sig_info_to_task(info, t);
  * Nuke all other threads in the group.
@@ -1656,7 +1662,7 @@ int force_sig_fault_to_task(int sig, int code, void __user *addr
 	info.si_flags = flags;
 	info.si_isr = isr;
-	return force_sig_info(info.si_signo, &info, t);
+	return force_sig_info_to_task(&info, t);
 int force_sig_fault(int sig, int code, void __user *addr

Powered by blists - more mailing lists