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-rw-r--r--kernel/audit.c8
-rw-r--r--kernel/auditfilter.c23
-rw-r--r--kernel/auditsc.c14
-rw-r--r--kernel/events/core.c4
-rw-r--r--kernel/irq/internals.h4
-rw-r--r--kernel/irq/irqdesc.c52
-rw-r--r--kernel/irq/proc.c22
-rw-r--r--kernel/power/Kconfig16
-rw-r--r--kernel/time/tick-sched.c2
9 files changed, 109 insertions, 36 deletions
diff --git a/kernel/audit.c b/kernel/audit.c
index aba9d9f..72ab759 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -429,7 +429,7 @@ static void kauditd_send_skb(struct sk_buff *skb)
* This function doesn't consume an skb as might be expected since it has to
* copy it anyways.
*/
-static void kauditd_send_multicast_skb(struct sk_buff *skb)
+static void kauditd_send_multicast_skb(struct sk_buff *skb, gfp_t gfp_mask)
{
struct sk_buff *copy;
struct audit_net *aunet = net_generic(&init_net, audit_net_id);
@@ -448,11 +448,11 @@ static void kauditd_send_multicast_skb(struct sk_buff *skb)
* no reason for new multicast clients to continue with this
* non-compliance.
*/
- copy = skb_copy(skb, GFP_KERNEL);
+ copy = skb_copy(skb, gfp_mask);
if (!copy)
return;
- nlmsg_multicast(sock, copy, 0, AUDIT_NLGRP_READLOG, GFP_KERNEL);
+ nlmsg_multicast(sock, copy, 0, AUDIT_NLGRP_READLOG, gfp_mask);
}
/*
@@ -1940,7 +1940,7 @@ void audit_log_end(struct audit_buffer *ab)
struct nlmsghdr *nlh = nlmsg_hdr(ab->skb);
nlh->nlmsg_len = ab->skb->len;
- kauditd_send_multicast_skb(ab->skb);
+ kauditd_send_multicast_skb(ab->skb, ab->gfp_mask);
/*
* The original kaudit unicast socket sends up messages with
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 3598e13..4f68a32 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -442,19 +442,7 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
if ((f->type == AUDIT_LOGINUID) && (f->val == AUDIT_UID_UNSET)) {
f->type = AUDIT_LOGINUID_SET;
f->val = 0;
- }
-
- if ((f->type == AUDIT_PID) || (f->type == AUDIT_PPID)) {
- struct pid *pid;
- rcu_read_lock();
- pid = find_vpid(f->val);
- if (!pid) {
- rcu_read_unlock();
- err = -ESRCH;
- goto exit_free;
- }
- f->val = pid_nr(pid);
- rcu_read_unlock();
+ entry->rule.pflags |= AUDIT_LOGINUID_LEGACY;
}
err = audit_field_valid(entry, f);
@@ -630,6 +618,13 @@ static struct audit_rule_data *audit_krule_to_data(struct audit_krule *krule)
data->buflen += data->values[i] =
audit_pack_string(&bufp, krule->filterkey);
break;
+ case AUDIT_LOGINUID_SET:
+ if (krule->pflags & AUDIT_LOGINUID_LEGACY && !f->val) {
+ data->fields[i] = AUDIT_LOGINUID;
+ data->values[i] = AUDIT_UID_UNSET;
+ break;
+ }
+ /* fallthrough if set */
default:
data->values[i] = f->val;
}
@@ -646,6 +641,7 @@ static int audit_compare_rule(struct audit_krule *a, struct audit_krule *b)
int i;
if (a->flags != b->flags ||
+ a->pflags != b->pflags ||
a->listnr != b->listnr ||
a->action != b->action ||
a->field_count != b->field_count)
@@ -764,6 +760,7 @@ struct audit_entry *audit_dupe_rule(struct audit_krule *old)
new = &entry->rule;
new->vers_ops = old->vers_ops;
new->flags = old->flags;
+ new->pflags = old->pflags;
new->listnr = old->listnr;
new->action = old->action;
for (i = 0; i < AUDIT_BITMASK_SIZE; i++)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index c75522a..37c69ab 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1877,12 +1877,18 @@ void __audit_inode(struct filename *name, const struct dentry *dentry,
}
out_alloc:
- /* unable to find the name from a previous getname(). Allocate a new
- * anonymous entry.
- */
- n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
+ /* unable to find an entry with both a matching name and type */
+ n = audit_alloc_name(context, AUDIT_TYPE_UNKNOWN);
if (!n)
return;
+ if (name)
+ /* since name is not NULL we know there is already a matching
+ * name record, see audit_getname(), so there must be a type
+ * mismatch; reuse the string path since the original name
+ * record will keep the string valid until we free it in
+ * audit_free_names() */
+ n->name = name;
+
out:
if (parent) {
n->name_len = n->name ? parent_len(n->name->name) : AUDIT_NAME_FULL;
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 113b837..4c1ee7f 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7477,11 +7477,11 @@ SYSCALL_DEFINE5(perf_event_open,
if (move_group) {
synchronize_rcu();
- perf_install_in_context(ctx, group_leader, event->cpu);
+ perf_install_in_context(ctx, group_leader, group_leader->cpu);
get_ctx(ctx);
list_for_each_entry(sibling, &group_leader->sibling_list,
group_entry) {
- perf_install_in_context(ctx, sibling, event->cpu);
+ perf_install_in_context(ctx, sibling, sibling->cpu);
get_ctx(ctx);
}
}
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 4332d76..df553b0 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -78,8 +78,12 @@ extern void unmask_threaded_irq(struct irq_desc *desc);
#ifdef CONFIG_SPARSE_IRQ
static inline void irq_mark_irq(unsigned int irq) { }
+extern void irq_lock_sparse(void);
+extern void irq_unlock_sparse(void);
#else
extern void irq_mark_irq(unsigned int irq);
+static inline void irq_lock_sparse(void) { }
+static inline void irq_unlock_sparse(void) { }
#endif
extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index a1782f8..99793b9 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -132,6 +132,16 @@ static void free_masks(struct irq_desc *desc)
static inline void free_masks(struct irq_desc *desc) { }
#endif
+void irq_lock_sparse(void)
+{
+ mutex_lock(&sparse_irq_lock);
+}
+
+void irq_unlock_sparse(void)
+{
+ mutex_unlock(&sparse_irq_lock);
+}
+
static struct irq_desc *alloc_desc(int irq, int node, struct module *owner)
{
struct irq_desc *desc;
@@ -168,6 +178,12 @@ static void free_desc(unsigned int irq)
unregister_irq_proc(irq, desc);
+ /*
+ * sparse_irq_lock protects also show_interrupts() and
+ * kstat_irq_usr(). Once we deleted the descriptor from the
+ * sparse tree we can free it. Access in proc will fail to
+ * lookup the descriptor.
+ */
mutex_lock(&sparse_irq_lock);
delete_irq_desc(irq);
mutex_unlock(&sparse_irq_lock);
@@ -574,6 +590,15 @@ void kstat_incr_irq_this_cpu(unsigned int irq)
kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
}
+/**
+ * kstat_irqs_cpu - Get the statistics for an interrupt on a cpu
+ * @irq: The interrupt number
+ * @cpu: The cpu number
+ *
+ * Returns the sum of interrupt counts on @cpu since boot for
+ * @irq. The caller must ensure that the interrupt is not removed
+ * concurrently.
+ */
unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
{
struct irq_desc *desc = irq_to_desc(irq);
@@ -582,6 +607,14 @@ unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
*per_cpu_ptr(desc->kstat_irqs, cpu) : 0;
}
+/**
+ * kstat_irqs - Get the statistics for an interrupt
+ * @irq: The interrupt number
+ *
+ * Returns the sum of interrupt counts on all cpus since boot for
+ * @irq. The caller must ensure that the interrupt is not removed
+ * concurrently.
+ */
unsigned int kstat_irqs(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
@@ -594,3 +627,22 @@ unsigned int kstat_irqs(unsigned int irq)
sum += *per_cpu_ptr(desc->kstat_irqs, cpu);
return sum;
}
+
+/**
+ * kstat_irqs_usr - Get the statistics for an interrupt
+ * @irq: The interrupt number
+ *
+ * Returns the sum of interrupt counts on all cpus since boot for
+ * @irq. Contrary to kstat_irqs() this can be called from any
+ * preemptible context. It's protected against concurrent removal of
+ * an interrupt descriptor when sparse irqs are enabled.
+ */
+unsigned int kstat_irqs_usr(unsigned int irq)
+{
+ int sum;
+
+ irq_lock_sparse();
+ sum = kstat_irqs(irq);
+ irq_unlock_sparse();
+ return sum;
+}
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index ac1ba2f..9dc9bfd 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -15,6 +15,23 @@
#include "internals.h"
+/*
+ * Access rules:
+ *
+ * procfs protects read/write of /proc/irq/N/ files against a
+ * concurrent free of the interrupt descriptor. remove_proc_entry()
+ * immediately prevents new read/writes to happen and waits for
+ * already running read/write functions to complete.
+ *
+ * We remove the proc entries first and then delete the interrupt
+ * descriptor from the radix tree and free it. So it is guaranteed
+ * that irq_to_desc(N) is valid as long as the read/writes are
+ * permitted by procfs.
+ *
+ * The read from /proc/interrupts is a different problem because there
+ * is no protection. So the lookup and the access to irqdesc
+ * information must be protected by sparse_irq_lock.
+ */
static struct proc_dir_entry *root_irq_dir;
#ifdef CONFIG_SMP
@@ -437,9 +454,10 @@ int show_interrupts(struct seq_file *p, void *v)
seq_putc(p, '\n');
}
+ irq_lock_sparse();
desc = irq_to_desc(i);
if (!desc)
- return 0;
+ goto outsparse;
raw_spin_lock_irqsave(&desc->lock, flags);
for_each_online_cpu(j)
@@ -479,6 +497,8 @@ int show_interrupts(struct seq_file *p, void *v)
seq_putc(p, '\n');
out:
raw_spin_unlock_irqrestore(&desc->lock, flags);
+outsparse:
+ irq_unlock_sparse();
return 0;
}
#endif
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 6e7708c..48b28d3 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -94,7 +94,7 @@ config PM_STD_PARTITION
config PM_SLEEP
def_bool y
depends on SUSPEND || HIBERNATE_CALLBACKS
- select PM_RUNTIME
+ select PM
config PM_SLEEP_SMP
def_bool y
@@ -130,23 +130,19 @@ config PM_WAKELOCKS_GC
depends on PM_WAKELOCKS
default y
-config PM_RUNTIME
- bool "Run-time PM core functionality"
+config PM
+ bool "Device power management core functionality"
---help---
Enable functionality allowing I/O devices to be put into energy-saving
- (low power) states at run time (or autosuspended) after a specified
- period of inactivity and woken up in response to a hardware-generated
+ (low power) states, for example after a specified period of inactivity
+ (autosuspended), and woken up in response to a hardware-generated
wake-up event or a driver's request.
Hardware support is generally required for this functionality to work
and the bus type drivers of the buses the devices are on are
- responsible for the actual handling of the autosuspend requests and
+ responsible for the actual handling of device suspend requests and
wake-up events.
-config PM
- def_bool y
- depends on PM_SLEEP || PM_RUNTIME
-
config PM_DEBUG
bool "Power Management Debug Support"
depends on PM
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 4d54b75..1363d58 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -847,7 +847,6 @@ void tick_nohz_idle_enter(void)
local_irq_enable();
}
-EXPORT_SYMBOL_GPL(tick_nohz_idle_enter);
/**
* tick_nohz_irq_exit - update next tick event from interrupt exit
@@ -974,7 +973,6 @@ void tick_nohz_idle_exit(void)
local_irq_enable();
}
-EXPORT_SYMBOL_GPL(tick_nohz_idle_exit);
static int tick_nohz_reprogram(struct tick_sched *ts, ktime_t now)
{
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