Fix reading thread name from comm file

1 files changed, 10 insertions, 1 deletions

diff --git a/nptl/sysdeps/unix/sysv/linux/pthread_getname.c b/nptl/sysdeps/unix/sysv/linux/pthread_getname.c
index 6e7786f987..2c5ee6305e 100644
--- a/nptl/sysdeps/unix/sysv/linux/pthread_getname.c
+++ b/nptl/sysdeps/unix/sysv/linux/pthread_getname.c
@@ -1,5 +1,5 @@
 /* pthread_getname_np -- Get  thread name.  Linux version
-   Copyright (C) 2010 Free Software Foundation, Inc.
+   Copyright (C) 2010, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -57,6 +57,15 @@ pthread_getname_np (th, buf, len)
   ssize_t n = TEMP_FAILURE_RETRY (read_not_cancel (fd, buf, len));
   if (n < 0)
     res = errno;
+  else
+    {
+      if (buf[n - 1] == '\n')
+	buf[n - 1] = '\0';
+      else if (n == len)
+	res = ERANGE;
+      else
+	buf[n] = '\0';
+    }
 
   close_not_cancel_no_status (fd);