vfs: missed source of ->f_pos races

[pandora-kernel.git] / fs / compat.c

diff --git a/fs/compat.c b/fs/compat.c
index c987875..e07a3d3 100644 (file)
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1174,11 +1174,14 @@ compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
        struct file *file;
        int fput_needed;
        ssize_t ret;
+       loff_t pos;
 
        file = fget_light(fd, &fput_needed);
        if (!file)
                return -EBADF;
-       ret = compat_readv(file, vec, vlen, &file->f_pos);
+       pos = file->f_pos;
+       ret = compat_readv(file, vec, vlen, &pos);
+       file->f_pos = pos;
        fput_light(file, fput_needed);
        return ret;
 }
@@ -1233,11 +1236,14 @@ compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
        struct file *file;
        int fput_needed;
        ssize_t ret;
+       loff_t pos;
 
        file = fget_light(fd, &fput_needed);
        if (!file)
                return -EBADF;
-       ret = compat_writev(file, vec, vlen, &file->f_pos);
+       pos = file->f_pos;
+       ret = compat_writev(file, vec, vlen, &pos);
+       file->f_pos = pos;
        fput_light(file, fput_needed);
        return ret;
 }