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Diffstat (limited to 'kernel')
-rw-r--r--kernel/audit_tree.c100
-rw-r--r--kernel/hw_breakpoint.c2
-rw-r--r--kernel/kfifo.c3
-rw-r--r--kernel/perf_event.c13
-rw-r--r--kernel/softirq.c15
-rw-r--r--kernel/sys.c2
-rw-r--r--kernel/sysctl_binary.c7
-rw-r--r--kernel/time/timekeeping.c2
-rw-r--r--kernel/trace/trace_kprobe.c2
-rw-r--r--kernel/trace/trace_stack.c24
10 files changed, 73 insertions, 97 deletions
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index 4b05bd9479db..028e85663f27 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -548,6 +548,11 @@ int audit_remove_tree_rule(struct audit_krule *rule)
return 0;
}
+static int compare_root(struct vfsmount *mnt, void *arg)
+{
+ return mnt->mnt_root->d_inode == arg;
+}
+
void audit_trim_trees(void)
{
struct list_head cursor;
@@ -559,7 +564,6 @@ void audit_trim_trees(void)
struct path path;
struct vfsmount *root_mnt;
struct node *node;
- struct list_head list;
int err;
tree = container_of(cursor.next, struct audit_tree, list);
@@ -577,24 +581,16 @@ void audit_trim_trees(void)
if (!root_mnt)
goto skip_it;
- list_add_tail(&list, &root_mnt->mnt_list);
spin_lock(&hash_lock);
list_for_each_entry(node, &tree->chunks, list) {
- struct audit_chunk *chunk = find_chunk(node);
- struct inode *inode = chunk->watch.inode;
- struct vfsmount *mnt;
+ struct inode *inode = find_chunk(node)->watch.inode;
node->index |= 1U<<31;
- list_for_each_entry(mnt, &list, mnt_list) {
- if (mnt->mnt_root->d_inode == inode) {
- node->index &= ~(1U<<31);
- break;
- }
- }
+ if (iterate_mounts(compare_root, inode, root_mnt))
+ node->index &= ~(1U<<31);
}
spin_unlock(&hash_lock);
trim_marked(tree);
put_tree(tree);
- list_del_init(&list);
drop_collected_mounts(root_mnt);
skip_it:
mutex_lock(&audit_filter_mutex);
@@ -603,22 +599,6 @@ skip_it:
mutex_unlock(&audit_filter_mutex);
}
-static int is_under(struct vfsmount *mnt, struct dentry *dentry,
- struct path *path)
-{
- if (mnt != path->mnt) {
- for (;;) {
- if (mnt->mnt_parent == mnt)
- return 0;
- if (mnt->mnt_parent == path->mnt)
- break;
- mnt = mnt->mnt_parent;
- }
- dentry = mnt->mnt_mountpoint;
- }
- return is_subdir(dentry, path->dentry);
-}
-
int audit_make_tree(struct audit_krule *rule, char *pathname, u32 op)
{
@@ -638,13 +618,17 @@ void audit_put_tree(struct audit_tree *tree)
put_tree(tree);
}
+static int tag_mount(struct vfsmount *mnt, void *arg)
+{
+ return tag_chunk(mnt->mnt_root->d_inode, arg);
+}
+
/* called with audit_filter_mutex */
int audit_add_tree_rule(struct audit_krule *rule)
{
struct audit_tree *seed = rule->tree, *tree;
struct path path;
- struct vfsmount *mnt, *p;
- struct list_head list;
+ struct vfsmount *mnt;
int err;
list_for_each_entry(tree, &tree_list, list) {
@@ -670,16 +654,9 @@ int audit_add_tree_rule(struct audit_krule *rule)
err = -ENOMEM;
goto Err;
}
- list_add_tail(&list, &mnt->mnt_list);
get_tree(tree);
- list_for_each_entry(p, &list, mnt_list) {
- err = tag_chunk(p->mnt_root->d_inode, tree);
- if (err)
- break;
- }
-
- list_del(&list);
+ err = iterate_mounts(tag_mount, tree, mnt);
drop_collected_mounts(mnt);
if (!err) {
@@ -714,31 +691,23 @@ int audit_tag_tree(char *old, char *new)
{
struct list_head cursor, barrier;
int failed = 0;
- struct path path;
+ struct path path1, path2;
struct vfsmount *tagged;
- struct list_head list;
- struct vfsmount *mnt;
- struct dentry *dentry;
int err;
- err = kern_path(new, 0, &path);
+ err = kern_path(new, 0, &path2);
if (err)
return err;
- tagged = collect_mounts(&path);
- path_put(&path);
+ tagged = collect_mounts(&path2);
+ path_put(&path2);
if (!tagged)
return -ENOMEM;
- err = kern_path(old, 0, &path);
+ err = kern_path(old, 0, &path1);
if (err) {
drop_collected_mounts(tagged);
return err;
}
- mnt = mntget(path.mnt);
- dentry = dget(path.dentry);
- path_put(&path);
-
- list_add_tail(&list, &tagged->mnt_list);
mutex_lock(&audit_filter_mutex);
list_add(&barrier, &tree_list);
@@ -746,7 +715,7 @@ int audit_tag_tree(char *old, char *new)
while (cursor.next != &tree_list) {
struct audit_tree *tree;
- struct vfsmount *p;
+ int good_one = 0;
tree = container_of(cursor.next, struct audit_tree, list);
get_tree(tree);
@@ -754,30 +723,19 @@ int audit_tag_tree(char *old, char *new)
list_add(&cursor, &tree->list);
mutex_unlock(&audit_filter_mutex);
- err = kern_path(tree->pathname, 0, &path);
- if (err) {
- put_tree(tree);
- mutex_lock(&audit_filter_mutex);
- continue;
+ err = kern_path(tree->pathname, 0, &path2);
+ if (!err) {
+ good_one = path_is_under(&path1, &path2);
+ path_put(&path2);
}
- spin_lock(&vfsmount_lock);
- if (!is_under(mnt, dentry, &path)) {
- spin_unlock(&vfsmount_lock);
- path_put(&path);
+ if (!good_one) {
put_tree(tree);
mutex_lock(&audit_filter_mutex);
continue;
}
- spin_unlock(&vfsmount_lock);
- path_put(&path);
-
- list_for_each_entry(p, &list, mnt_list) {
- failed = tag_chunk(p->mnt_root->d_inode, tree);
- if (failed)
- break;
- }
+ failed = iterate_mounts(tag_mount, tree, tagged);
if (failed) {
put_tree(tree);
mutex_lock(&audit_filter_mutex);
@@ -818,10 +776,8 @@ int audit_tag_tree(char *old, char *new)
}
list_del(&barrier);
list_del(&cursor);
- list_del(&list);
mutex_unlock(&audit_filter_mutex);
- dput(dentry);
- mntput(mnt);
+ path_put(&path1);
drop_collected_mounts(tagged);
return failed;
}
diff --git a/kernel/hw_breakpoint.c b/kernel/hw_breakpoint.c
index 8a5c7d55ac9f..967e66143e11 100644
--- a/kernel/hw_breakpoint.c
+++ b/kernel/hw_breakpoint.c
@@ -360,8 +360,8 @@ EXPORT_SYMBOL_GPL(register_user_hw_breakpoint);
int modify_user_hw_breakpoint(struct perf_event *bp, struct perf_event_attr *attr)
{
u64 old_addr = bp->attr.bp_addr;
+ u64 old_len = bp->attr.bp_len;
int old_type = bp->attr.bp_type;
- int old_len = bp->attr.bp_len;
int err = 0;
perf_event_disable(bp);
diff --git a/kernel/kfifo.c b/kernel/kfifo.c
index 498cabba225e..35edbe22e9a9 100644
--- a/kernel/kfifo.c
+++ b/kernel/kfifo.c
@@ -80,7 +80,7 @@ int kfifo_alloc(struct kfifo *fifo, unsigned int size, gfp_t gfp_mask)
buffer = kmalloc(size, gfp_mask);
if (!buffer) {
- _kfifo_init(fifo, 0, 0);
+ _kfifo_init(fifo, NULL, 0);
return -ENOMEM;
}
@@ -97,6 +97,7 @@ EXPORT_SYMBOL(kfifo_alloc);
void kfifo_free(struct kfifo *fifo)
{
kfree(fifo->buffer);
+ _kfifo_init(fifo, NULL, 0);
}
EXPORT_SYMBOL(kfifo_free);
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index d27746bd3a06..2ae7409bf38f 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -3259,8 +3259,6 @@ static void perf_event_task_output(struct perf_event *event,
task_event->event_id.tid = perf_event_tid(event, task);
task_event->event_id.ptid = perf_event_tid(event, current);
- task_event->event_id.time = perf_clock();
-
perf_output_put(&handle, task_event->event_id);
perf_output_end(&handle);
@@ -3268,7 +3266,7 @@ static void perf_event_task_output(struct perf_event *event,
static int perf_event_task_match(struct perf_event *event)
{
- if (event->state != PERF_EVENT_STATE_ACTIVE)
+ if (event->state < PERF_EVENT_STATE_INACTIVE)
return 0;
if (event->cpu != -1 && event->cpu != smp_processor_id())
@@ -3300,7 +3298,7 @@ static void perf_event_task_event(struct perf_task_event *task_event)
cpuctx = &get_cpu_var(perf_cpu_context);
perf_event_task_ctx(&cpuctx->ctx, task_event);
if (!ctx)
- ctx = rcu_dereference(task_event->task->perf_event_ctxp);
+ ctx = rcu_dereference(current->perf_event_ctxp);
if (ctx)
perf_event_task_ctx(ctx, task_event);
put_cpu_var(perf_cpu_context);
@@ -3331,6 +3329,7 @@ static void perf_event_task(struct task_struct *task,
/* .ppid */
/* .tid */
/* .ptid */
+ .time = perf_clock(),
},
};
@@ -3380,7 +3379,7 @@ static void perf_event_comm_output(struct perf_event *event,
static int perf_event_comm_match(struct perf_event *event)
{
- if (event->state != PERF_EVENT_STATE_ACTIVE)
+ if (event->state < PERF_EVENT_STATE_INACTIVE)
return 0;
if (event->cpu != -1 && event->cpu != smp_processor_id())
@@ -3500,7 +3499,7 @@ static void perf_event_mmap_output(struct perf_event *event,
static int perf_event_mmap_match(struct perf_event *event,
struct perf_mmap_event *mmap_event)
{
- if (event->state != PERF_EVENT_STATE_ACTIVE)
+ if (event->state < PERF_EVENT_STATE_INACTIVE)
return 0;
if (event->cpu != -1 && event->cpu != smp_processor_id())
@@ -4580,7 +4579,7 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr,
if (attr->type >= PERF_TYPE_MAX)
return -EINVAL;
- if (attr->__reserved_1 || attr->__reserved_2)
+ if (attr->__reserved_1)
return -EINVAL;
if (attr->sample_type & ~(PERF_SAMPLE_MAX-1))
diff --git a/kernel/softirq.c b/kernel/softirq.c
index a09502e2ef75..7c1a67ef0274 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -500,22 +500,17 @@ EXPORT_SYMBOL(tasklet_kill);
*/
/*
- * The trampoline is called when the hrtimer expires. If this is
- * called from the hrtimer interrupt then we schedule the tasklet as
- * the timer callback function expects to run in softirq context. If
- * it's called in softirq context anyway (i.e. high resolution timers
- * disabled) then the hrtimer callback is called right away.
+ * The trampoline is called when the hrtimer expires. It schedules a tasklet
+ * to run __tasklet_hrtimer_trampoline() which in turn will call the intended
+ * hrtimer callback, but from softirq context.
*/
static enum hrtimer_restart __hrtimer_tasklet_trampoline(struct hrtimer *timer)
{
struct tasklet_hrtimer *ttimer =
container_of(timer, struct tasklet_hrtimer, timer);
- if (hrtimer_is_hres_active(timer)) {
- tasklet_hi_schedule(&ttimer->tasklet);
- return HRTIMER_NORESTART;
- }
- return ttimer->function(timer);
+ tasklet_hi_schedule(&ttimer->tasklet);
+ return HRTIMER_NORESTART;
}
/*
diff --git a/kernel/sys.c b/kernel/sys.c
index 26a6b73a6b85..18bde979f346 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -222,6 +222,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who)
if (which > PRIO_USER || which < PRIO_PROCESS)
return -EINVAL;
+ rcu_read_lock();
read_lock(&tasklist_lock);
switch (which) {
case PRIO_PROCESS:
@@ -267,6 +268,7 @@ SYSCALL_DEFINE2(getpriority, int, which, int, who)
}
out_unlock:
read_unlock(&tasklist_lock);
+ rcu_read_unlock();
return retval;
}
diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c
index 8f5d16e0707a..8cd50d8f9bde 100644
--- a/kernel/sysctl_binary.c
+++ b/kernel/sysctl_binary.c
@@ -1331,7 +1331,7 @@ static ssize_t binary_sysctl(const int *name, int nlen,
ssize_t result;
char *pathname;
int flags;
- int acc_mode, fmode;
+ int acc_mode;
pathname = sysctl_getname(name, nlen, &table);
result = PTR_ERR(pathname);
@@ -1342,15 +1342,12 @@ static ssize_t binary_sysctl(const int *name, int nlen,
if (oldval && oldlen && newval && newlen) {
flags = O_RDWR;
acc_mode = MAY_READ | MAY_WRITE;
- fmode = FMODE_READ | FMODE_WRITE;
} else if (newval && newlen) {
flags = O_WRONLY;
acc_mode = MAY_WRITE;
- fmode = FMODE_WRITE;
} else if (oldval && oldlen) {
flags = O_RDONLY;
acc_mode = MAY_READ;
- fmode = FMODE_READ;
} else {
result = 0;
goto out_putname;
@@ -1361,7 +1358,7 @@ static ssize_t binary_sysctl(const int *name, int nlen,
if (result)
goto out_putname;
- result = may_open(&nd.path, acc_mode, fmode);
+ result = may_open(&nd.path, acc_mode, flags);
if (result)
goto out_putpath;
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 7faaa32fbf4f..e2ab064c6d41 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -880,6 +880,7 @@ void getboottime(struct timespec *ts)
set_normalized_timespec(ts, -boottime.tv_sec, -boottime.tv_nsec);
}
+EXPORT_SYMBOL_GPL(getboottime);
/**
* monotonic_to_bootbased - Convert the monotonic time to boot based.
@@ -889,6 +890,7 @@ void monotonic_to_bootbased(struct timespec *ts)
{
*ts = timespec_add_safe(*ts, total_sleep_time);
}
+EXPORT_SYMBOL_GPL(monotonic_to_bootbased);
unsigned long get_seconds(void)
{
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 6ea90c0e2c96..50b1b8239806 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -689,7 +689,7 @@ static int create_trace_probe(int argc, char **argv)
return -EINVAL;
}
/* an address specified */
- ret = strict_strtoul(&argv[0][2], 0, (unsigned long *)&addr);
+ ret = strict_strtoul(&argv[1][0], 0, (unsigned long *)&addr);
if (ret) {
pr_info("Failed to parse address.\n");
return ret;
diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index 678a5120ee30..f4bc9b27de5f 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -157,6 +157,7 @@ stack_max_size_write(struct file *filp, const char __user *ubuf,
unsigned long val, flags;
char buf[64];
int ret;
+ int cpu;
if (count >= sizeof(buf))
return -EINVAL;
@@ -171,9 +172,20 @@ stack_max_size_write(struct file *filp, const char __user *ubuf,
return ret;
local_irq_save(flags);
+
+ /*
+ * In case we trace inside arch_spin_lock() or after (NMI),
+ * we will cause circular lock, so we also need to increase
+ * the percpu trace_active here.
+ */
+ cpu = smp_processor_id();
+ per_cpu(trace_active, cpu)++;
+
arch_spin_lock(&max_stack_lock);
*ptr = val;
arch_spin_unlock(&max_stack_lock);
+
+ per_cpu(trace_active, cpu)--;
local_irq_restore(flags);
return count;
@@ -206,7 +218,13 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
static void *t_start(struct seq_file *m, loff_t *pos)
{
+ int cpu;
+
local_irq_disable();
+
+ cpu = smp_processor_id();
+ per_cpu(trace_active, cpu)++;
+
arch_spin_lock(&max_stack_lock);
if (*pos == 0)
@@ -217,7 +235,13 @@ static void *t_start(struct seq_file *m, loff_t *pos)
static void t_stop(struct seq_file *m, void *p)
{
+ int cpu;
+
arch_spin_unlock(&max_stack_lock);
+
+ cpu = smp_processor_id();
+ per_cpu(trace_active, cpu)--;
+
local_irq_enable();
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 02:20:30 +0000