X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fsignal.c;h=8072e568bbe0c41e68cffc8efa291488b4dcf0e7;hb=a5494dcd8b92dce64317f2f7dd0d62747c54980b;hp=ec81defde33946380518215cab07e309876360ed;hpb=6ee7e78e7c78d871409ad4df30551c9355be7d0e;p=pandora-kernel.git

diff --git a/kernel/signal.c b/kernel/signal.c
index ec81defde339..8072e568bbe0 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -24,6 +24,9 @@
 #include <linux/signal.h>
 #include <linux/capability.h>
 #include <linux/freezer.h>
+#include <linux/pid_namespace.h>
+#include <linux/nsproxy.h>
+
 #include <asm/param.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -583,7 +586,7 @@ static int check_kill_permission(int sig, struct siginfo *info,
 	error = -EPERM;
 	if ((info == SEND_SIG_NOINFO || (!is_si_special(info) && SI_FROMUSER(info)))
 	    && ((sig != SIGCONT) ||
-		(current->signal->session != t->signal->session))
+		(process_session(current) != process_session(t)))
 	    && (current->euid ^ t->suid) && (current->euid ^ t->uid)
 	    && (current->uid ^ t->suid) && (current->uid ^ t->uid)
 	    && !capable(CAP_KILL))
@@ -1093,42 +1096,21 @@ int kill_pgrp_info(int sig, struct siginfo *info, struct pid *pgrp)
 	return retval;
 }
 
-int __kill_pg_info(int sig, struct siginfo *info, pid_t pgrp)
-{
-	if (pgrp <= 0)
-		return -EINVAL;
-
-	return __kill_pgrp_info(sig, info, find_pid(pgrp));
-}
-
-int
-kill_pg_info(int sig, struct siginfo *info, pid_t pgrp)
-{
-	int retval;
-
-	read_lock(&tasklist_lock);
-	retval = __kill_pg_info(sig, info, pgrp);
-	read_unlock(&tasklist_lock);
-
-	return retval;
-}
-
 int kill_pid_info(int sig, struct siginfo *info, struct pid *pid)
 {
 	int error;
-	int acquired_tasklist_lock = 0;
 	struct task_struct *p;
 
 	rcu_read_lock();
-	if (unlikely(sig_needs_tasklist(sig))) {
+	if (unlikely(sig_needs_tasklist(sig)))
 		read_lock(&tasklist_lock);
-		acquired_tasklist_lock = 1;
-	}
+
 	p = pid_task(pid, PIDTYPE_PID);
 	error = -ESRCH;
 	if (p)
 		error = group_send_sig_info(sig, info, p);
-	if (unlikely(acquired_tasklist_lock))
+
+	if (unlikely(sig_needs_tasklist(sig)))
 		read_unlock(&tasklist_lock);
 	rcu_read_unlock();
 	return error;
@@ -1189,8 +1171,10 @@ EXPORT_SYMBOL_GPL(kill_pid_info_as_uid);
 
 static int kill_something_info(int sig, struct siginfo *info, int pid)
 {
+	int ret;
+	rcu_read_lock();
 	if (!pid) {
-		return kill_pg_info(sig, info, process_group(current));
+		ret = kill_pgrp_info(sig, info, task_pgrp(current));
 	} else if (pid == -1) {
 		int retval = 0, count = 0;
 		struct task_struct * p;
@@ -1205,12 +1189,14 @@ static int kill_something_info(int sig, struct siginfo *info, int pid)
 			}
 		}
 		read_unlock(&tasklist_lock);
-		return count ? retval : -ESRCH;
+		ret = count ? retval : -ESRCH;
 	} else if (pid < 0) {
-		return kill_pg_info(sig, info, -pid);
+		ret = kill_pgrp_info(sig, info, find_pid(-pid));
 	} else {
-		return kill_proc_info(sig, info, pid);
+		ret = kill_pid_info(sig, info, find_pid(pid));
 	}
+	rcu_read_unlock();
+	return ret;
 }
 
 /*
@@ -1308,12 +1294,6 @@ int kill_pid(struct pid *pid, int sig, int priv)
 }
 EXPORT_SYMBOL(kill_pid);
 
-int
-kill_pg(pid_t pgrp, int sig, int priv)
-{
-	return kill_pg_info(sig, __si_special(priv), pgrp);
-}
-
 int
 kill_proc(pid_t pid, int sig, int priv)
 {
@@ -1702,7 +1682,9 @@ finish_stop(int stop_count)
 		read_unlock(&tasklist_lock);
 	}
 
-	schedule();
+	do {
+		schedule();
+	} while (try_to_freeze());
 	/*
 	 * Now we don't run again until continued.
 	 */
@@ -1877,8 +1859,12 @@ relock:
 		if (sig_kernel_ignore(signr)) /* Default is nothing. */
 			continue;
 
-		/* Init gets no signals it doesn't want.  */
-		if (current == child_reaper)
+		/*
+		 * Init of a pid space gets no signals it doesn't want from
+		 * within that pid space. It can of course get signals from
+		 * its parent pid space.
+		 */
+		if (current == child_reaper(current))
 			continue;
 
 		if (sig_kernel_stop(signr)) {
@@ -1897,7 +1883,7 @@ relock:
 
 				/* signals can be posted during this window */
 
-				if (is_orphaned_pgrp(process_group(current)))
+				if (is_current_pgrp_orphaned())
 					goto relock;
 
 				spin_lock_irq(&current->sighand->siglock);
@@ -1947,7 +1933,6 @@ EXPORT_SYMBOL(recalc_sigpending);
 EXPORT_SYMBOL_GPL(dequeue_signal);
 EXPORT_SYMBOL(flush_signals);
 EXPORT_SYMBOL(force_sig);
-EXPORT_SYMBOL(kill_pg);
 EXPORT_SYMBOL(kill_proc);
 EXPORT_SYMBOL(ptrace_notify);
 EXPORT_SYMBOL(send_sig);
@@ -2274,7 +2259,7 @@ static int do_tkill(int tgid, int pid, int sig)
  *  @pid: the PID of the thread
  *  @sig: signal to be sent
  *
- *  This syscall also checks the tgid and returns -ESRCH even if the PID
+ *  This syscall also checks the @tgid and returns -ESRCH even if the PID
  *  exists but it's not belonging to the target process anymore. This
  *  method solves the problem of threads exiting and PIDs getting reused.
  */