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-rw-r--r--kernel/module.c3
-rw-r--r--kernel/mutex.c3
-rw-r--r--kernel/panic.c12
-rw-r--r--kernel/power/disk.c8
-rw-r--r--kernel/power/user.c9
-rw-r--r--kernel/trace/Kconfig4
-rw-r--r--kernel/trace/trace.c36
-rw-r--r--kernel/trace/trace_events.c12
-rw-r--r--kernel/trace/trace_events_filter.c14
-rw-r--r--kernel/trace/trace_events_stage_2.h4
10 files changed, 75 insertions, 30 deletions
diff --git a/kernel/module.c b/kernel/module.c
index 05f014efa32..e797812a4d9 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2388,6 +2388,9 @@ SYSCALL_DEFINE3(init_module, void __user *, umod,
blocking_notifier_call_chain(&module_notify_list,
MODULE_STATE_LIVE, mod);
+ /* We need to finish all async code before the module init sequence is done */
+ async_synchronize_full();
+
mutex_lock(&module_mutex);
/* Drop initial reference. */
module_put(mod);
diff --git a/kernel/mutex.c b/kernel/mutex.c
index 5d79781394a..507cf2b5e9f 100644
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -148,7 +148,8 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
preempt_disable();
mutex_acquire(&lock->dep_map, subclass, 0, ip);
-#if defined(CONFIG_SMP) && !defined(CONFIG_DEBUG_MUTEXES)
+#if defined(CONFIG_SMP) && !defined(CONFIG_DEBUG_MUTEXES) && \
+ !defined(CONFIG_HAVE_DEFAULT_NO_SPIN_MUTEXES)
/*
* Optimistic spinning.
*
diff --git a/kernel/panic.c b/kernel/panic.c
index 3fd8c5bf8b3..934fb377f4b 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -213,8 +213,16 @@ unsigned long get_taint(void)
void add_taint(unsigned flag)
{
- /* can't trust the integrity of the kernel anymore: */
- debug_locks = 0;
+ /*
+ * Can't trust the integrity of the kernel anymore.
+ * We don't call directly debug_locks_off() because the issue
+ * is not necessarily serious enough to set oops_in_progress to 1
+ * Also we want to keep up lockdep for staging development and
+ * post-warning case.
+ */
+ if (flag != TAINT_CRAP && flag != TAINT_WARN && __debug_locks_off())
+ printk(KERN_WARNING "Disabling lockdep due to kernel taint\n");
+
set_bit(flag, &tainted_mask);
}
EXPORT_SYMBOL(add_taint);
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 5f21ab2bbcd..0854770b63b 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -22,6 +22,7 @@
#include <linux/console.h>
#include <linux/cpu.h>
#include <linux/freezer.h>
+#include <scsi/scsi_scan.h>
#include <asm/suspend.h>
#include "power.h"
@@ -645,6 +646,13 @@ static int software_resume(void)
return 0;
/*
+ * We can't depend on SCSI devices being available after loading one of
+ * their modules if scsi_complete_async_scans() is not called and the
+ * resume device usually is a SCSI one.
+ */
+ scsi_complete_async_scans();
+
+ /*
* name_to_dev_t() below takes a sysfs buffer mutex when sysfs
* is configured into the kernel. Since the regular hibernate
* trigger path is via sysfs which takes a buffer mutex before
diff --git a/kernel/power/user.c b/kernel/power/user.c
index 6c85359364f..ed97375daae 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -24,6 +24,7 @@
#include <linux/cpu.h>
#include <linux/freezer.h>
#include <linux/smp_lock.h>
+#include <scsi/scsi_scan.h>
#include <asm/uaccess.h>
@@ -92,6 +93,7 @@ static int snapshot_open(struct inode *inode, struct file *filp)
filp->private_data = data;
memset(&data->handle, 0, sizeof(struct snapshot_handle));
if ((filp->f_flags & O_ACCMODE) == O_RDONLY) {
+ /* Hibernating. The image device should be accessible. */
data->swap = swsusp_resume_device ?
swap_type_of(swsusp_resume_device, 0, NULL) : -1;
data->mode = O_RDONLY;
@@ -99,6 +101,13 @@ static int snapshot_open(struct inode *inode, struct file *filp)
if (error)
pm_notifier_call_chain(PM_POST_HIBERNATION);
} else {
+ /*
+ * Resuming. We may need to wait for the image device to
+ * appear.
+ */
+ wait_for_device_probe();
+ scsi_complete_async_scans();
+
data->swap = -1;
data->mode = O_WRONLY;
error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 2246141bda4..417d1985e29 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -312,7 +312,7 @@ config KMEMTRACE
and profile kernel code.
This requires an userspace application to use. See
- Documentation/vm/kmemtrace.txt for more information.
+ Documentation/trace/kmemtrace.txt for more information.
Saying Y will make the kernel somewhat larger and slower. However,
if you disable kmemtrace at run-time or boot-time, the performance
@@ -403,7 +403,7 @@ config MMIOTRACE
implementation and works via page faults. Tracing is disabled by
default and can be enabled at run-time.
- See Documentation/tracers/mmiotrace.txt.
+ See Documentation/trace/mmiotrace.txt.
If you are not helping to develop drivers, say N.
config MMIOTRACE_TEST
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 9d28476a985..1ce5dc6372b 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3277,19 +3277,13 @@ static int tracing_buffers_open(struct inode *inode, struct file *filp)
info->tr = &global_trace;
info->cpu = cpu;
- info->spare = ring_buffer_alloc_read_page(info->tr->buffer);
+ info->spare = NULL;
/* Force reading ring buffer for first read */
info->read = (unsigned int)-1;
- if (!info->spare)
- goto out;
filp->private_data = info;
- return 0;
-
- out:
- kfree(info);
- return -ENOMEM;
+ return nonseekable_open(inode, filp);
}
static ssize_t
@@ -3304,6 +3298,11 @@ tracing_buffers_read(struct file *filp, char __user *ubuf,
if (!count)
return 0;
+ if (!info->spare)
+ info->spare = ring_buffer_alloc_read_page(info->tr->buffer);
+ if (!info->spare)
+ return -ENOMEM;
+
/* Do we have previous read data to read? */
if (info->read < PAGE_SIZE)
goto read;
@@ -3342,7 +3341,8 @@ static int tracing_buffers_release(struct inode *inode, struct file *file)
{
struct ftrace_buffer_info *info = file->private_data;
- ring_buffer_free_read_page(info->tr->buffer, info->spare);
+ if (info->spare)
+ ring_buffer_free_read_page(info->tr->buffer, info->spare);
kfree(info);
return 0;
@@ -3428,14 +3428,19 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
int size, i;
size_t ret;
- /*
- * We can't seek on a buffer input
- */
- if (unlikely(*ppos))
- return -ESPIPE;
+ if (*ppos & (PAGE_SIZE - 1)) {
+ WARN_ONCE(1, "Ftrace: previous read must page-align\n");
+ return -EINVAL;
+ }
+ if (len & (PAGE_SIZE - 1)) {
+ WARN_ONCE(1, "Ftrace: splice_read should page-align\n");
+ if (len < PAGE_SIZE)
+ return -EINVAL;
+ len &= PAGE_MASK;
+ }
- for (i = 0; i < PIPE_BUFFERS && len; i++, len -= size) {
+ for (i = 0; i < PIPE_BUFFERS && len; i++, len -= PAGE_SIZE) {
struct page *page;
int r;
@@ -3474,6 +3479,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
spd.partial[i].offset = 0;
spd.partial[i].private = (unsigned long)ref;
spd.nr_pages++;
+ *ppos += PAGE_SIZE;
}
spd.nr_pages = i;
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 64ec4d278ff..576f4fa2af0 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -503,6 +503,7 @@ event_filter_write(struct file *filp, const char __user *ubuf, size_t cnt,
if (copy_from_user(&buf, ubuf, cnt))
return -EFAULT;
+ buf[cnt] = '\0';
pred = kzalloc(sizeof(*pred), GFP_KERNEL);
if (!pred)
@@ -520,9 +521,10 @@ event_filter_write(struct file *filp, const char __user *ubuf, size_t cnt,
return cnt;
}
- if (filter_add_pred(call, pred)) {
+ err = filter_add_pred(call, pred);
+ if (err < 0) {
filter_free_pred(pred);
- return -EINVAL;
+ return err;
}
*ppos += cnt;
@@ -569,6 +571,7 @@ subsystem_filter_write(struct file *filp, const char __user *ubuf, size_t cnt,
if (copy_from_user(&buf, ubuf, cnt))
return -EFAULT;
+ buf[cnt] = '\0';
pred = kzalloc(sizeof(*pred), GFP_KERNEL);
if (!pred)
@@ -586,10 +589,11 @@ subsystem_filter_write(struct file *filp, const char __user *ubuf, size_t cnt,
return cnt;
}
- if (filter_add_subsystem_pred(system, pred)) {
+ err = filter_add_subsystem_pred(system, pred);
+ if (err < 0) {
filter_free_subsystem_preds(system);
filter_free_pred(pred);
- return -EINVAL;
+ return err;
}
*ppos += cnt;
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 026be412f35..e03cbf1e38f 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -215,7 +215,7 @@ static int __filter_add_pred(struct ftrace_event_call *call,
}
}
- return -ENOMEM;
+ return -ENOSPC;
}
static int is_string_field(const char *type)
@@ -319,7 +319,7 @@ int filter_add_subsystem_pred(struct event_subsystem *system,
}
if (i == MAX_FILTER_PRED)
- return -EINVAL;
+ return -ENOSPC;
events_for_each(call) {
int err;
@@ -410,16 +410,22 @@ int filter_parse(char **pbuf, struct filter_pred *pred)
}
}
+ if (!val_str) {
+ pred->field_name = NULL;
+ return -EINVAL;
+ }
+
pred->field_name = kstrdup(pred->field_name, GFP_KERNEL);
if (!pred->field_name)
return -ENOMEM;
- pred->val = simple_strtoull(val_str, &tmp, 10);
+ pred->val = simple_strtoull(val_str, &tmp, 0);
if (tmp == val_str) {
pred->str_val = kstrdup(val_str, GFP_KERNEL);
if (!pred->str_val)
return -ENOMEM;
- }
+ } else if (*tmp != '\0')
+ return -EINVAL;
return 0;
}
diff --git a/kernel/trace/trace_events_stage_2.h b/kernel/trace/trace_events_stage_2.h
index 30743f7d411..d363c6672c6 100644
--- a/kernel/trace/trace_events_stage_2.h
+++ b/kernel/trace/trace_events_stage_2.h
@@ -105,10 +105,10 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \
return 0;
#undef __entry
-#define __entry "REC"
+#define __entry REC
#undef TP_printk
-#define TP_printk(fmt, args...) "%s, %s\n", #fmt, #args
+#define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args)
#undef TP_fast_assign
#define TP_fast_assign(args...) args
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-09 14:39:24 +0000