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-rw-r--r--drivers/base/core.c5
-rw-r--r--fs/sysfs/file.c8
2 files changed, 12 insertions, 1 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 7de543d1d0b..24198ad0197 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -19,6 +19,7 @@
#include <linux/kdev_t.h>
#include <linux/notifier.h>
#include <linux/genhd.h>
+#include <linux/kallsyms.h>
#include <asm/semaphore.h>
#include "base.h"
@@ -68,6 +69,10 @@ static ssize_t dev_attr_show(struct kobject *kobj, struct attribute *attr,
if (dev_attr->show)
ret = dev_attr->show(dev, dev_attr, buf);
+ if (ret >= (ssize_t)PAGE_SIZE) {
+ print_symbol("dev_attr_show: %s returned bad count\n",
+ (unsigned long)dev_attr->show);
+ }
return ret;
}
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index a271c87c447..baa663e6938 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/kobject.h>
+#include <linux/kallsyms.h>
#include <linux/namei.h>
#include <linux/poll.h>
#include <linux/list.h>
@@ -86,7 +87,12 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
* The code works fine with PAGE_SIZE return but it's likely to
* indicate truncated result or overflow in normal use cases.
*/
- BUG_ON(count >= (ssize_t)PAGE_SIZE);
+ if (count >= (ssize_t)PAGE_SIZE) {
+ print_symbol("fill_read_buffer: %s returned bad count\n",
+ (unsigned long)ops->show);
+ /* Try to struggle along */
+ count = PAGE_SIZE - 1;
+ }
if (count >= 0) {
buffer->needs_read_fill = 0;
buffer->count = count;