5 files changed, 37 insertions, 10 deletions

diff --git a/kernel/cred.c b/kernel/cred.c
index a2d5504..60bc8b1 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -209,6 +209,31 @@ void exit_creds(struct task_struct *tsk)
 	}
 }
 
+/**
+ * get_task_cred - Get another task's objective credentials
+ * @task: The task to query
+ *
+ * Get the objective credentials of a task, pinning them so that they can't go
+ * away.  Accessing a task's credentials directly is not permitted.
+ *
+ * The caller must also make sure task doesn't get deleted, either by holding a
+ * ref on task or by holding tasklist_lock to prevent it from being unlinked.
+ */
+const struct cred *get_task_cred(struct task_struct *task)
+{
+	const struct cred *cred;
+
+	rcu_read_lock();
+
+	do {
+		cred = __task_cred((task));
+		BUG_ON(!cred);
+	} while (!atomic_inc_not_zero(&((struct cred *)cred)->usage));
+
+	rcu_read_unlock();
+	return cred;
+}
+
 /*
  * Allocate blank credentials, such that the credentials can be filled in at a
  * later date without risk of ENOMEM.
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index 5cb7cd1..8bc5eef 100644
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -605,13 +605,13 @@ cpu_master_loop:
 		if (dbg_kdb_mode) {
 			kgdb_connected = 1;
 			error = kdb_stub(ks);
+			kgdb_connected = 0;
 		} else {
 			error = gdb_serial_stub(ks);
 		}
 
 		if (error == DBG_PASS_EVENT) {
 			dbg_kdb_mode = !dbg_kdb_mode;
-			kgdb_connected = 0;
 		} else if (error == DBG_SWITCH_CPU_EVENT) {
 			dbg_cpu_switch(cpu, dbg_switch_cpu);
 			goto cpu_loop;
diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
index 4b17b32..e8fd686 100644
--- a/kernel/debug/gdbstub.c
+++ b/kernel/debug/gdbstub.c
@@ -621,10 +621,8 @@ static void gdb_cmd_query(struct kgdb_state *ks)
 	switch (remcom_in_buffer[1]) {
 	case 's':
 	case 'f':
-		if (memcmp(remcom_in_buffer + 2, "ThreadInfo", 10)) {
-			error_packet(remcom_out_buffer, -EINVAL);
+		if (memcmp(remcom_in_buffer + 2, "ThreadInfo", 10))
 			break;
-		}
 
 		i = 0;
 		remcom_out_buffer[0] = 'm';
@@ -665,10 +663,9 @@ static void gdb_cmd_query(struct kgdb_state *ks)
 		pack_threadid(remcom_out_buffer + 2, thref);
 		break;
 	case 'T':
-		if (memcmp(remcom_in_buffer + 1, "ThreadExtraInfo,", 16)) {
-			error_packet(remcom_out_buffer, -EINVAL);
+		if (memcmp(remcom_in_buffer + 1, "ThreadExtraInfo,", 16))
 			break;
-		}
+
 		ks->threadid = 0;
 		ptr = remcom_in_buffer + 17;
 		kgdb_hex2long(&ptr, &ks->threadid);
diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index 184cd82..ebe4a28 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -1820,9 +1820,8 @@ static int kdb_sr(int argc, const char **argv)
 {
 	if (argc != 1)
 		return KDB_ARGCOUNT;
-	sysrq_toggle_support(1);
 	kdb_trap_printk++;
-	handle_sysrq(*argv[1], NULL);
+	__handle_sysrq(*argv[1], NULL, 0);
 	kdb_trap_printk--;
 
 	return 0;
@@ -1883,6 +1882,7 @@ static int kdb_lsmod(int argc, const char **argv)
 			kdb_printf(" (Loading)");
 		else
 			kdb_printf(" (Live)");
+		kdb_printf(" 0x%p", mod->module_core);
 
 #ifdef CONFIG_MODULE_UNLOAD
 		{
@@ -2291,6 +2291,9 @@ static int kdb_ll(int argc, const char **argv)
 	while (va) {
 		char buf[80];
 
+		if (KDB_FLAG(CMD_INTERRUPT))
+			return 0;
+
 		sprintf(buf, "%s " kdb_machreg_fmt "\n", command, va);
 		diag = kdb_parse(buf);
 		if (diag)
diff --git a/kernel/module.c b/kernel/module.c
index 5d2d281..6c56282 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -787,7 +787,6 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
 
 	/* Store the name of the last unloaded module for diagnostic purposes */
 	strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
-	ddebug_remove_module(mod->name);
 
 	free_module(mod);
 	return 0;
@@ -1550,6 +1549,9 @@ static void free_module(struct module *mod)
 	remove_sect_attrs(mod);
 	mod_kobject_remove(mod);
 
+	/* Remove dynamic debug info */
+	ddebug_remove_module(mod->name);
+
 	/* Arch-specific cleanup. */
 	module_arch_cleanup(mod);