diff options
| -rw-r--r-- | fs/read_write.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index 21c9d90a257e..42a027719324 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -455,15 +455,12 @@ ssize_t __kernel_read(struct file *file, void *buf, size_t count, loff_t *pos) ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos) { - mm_segment_t old_fs; - ssize_t result; + ssize_t ret; - old_fs = get_fs(); - set_fs(KERNEL_DS); - /* The cast to a user pointer is valid due to the set_fs() */ - result = vfs_read(file, (void __user *)buf, count, pos); - set_fs(old_fs); - return result; + ret = rw_verify_area(READ, file, pos, count); + if (ret) + return ret; + return __kernel_read(file, buf, count, pos); } EXPORT_SYMBOL(kernel_read); |