debian/patches/0099-fix-ss-no-header-renderer.patch

   1 When ss is invoked with the no-header flag, if the query doesn't return
   2 any result, render() is called with 'buffer' uninitialized. This
   3 currently leads to a segfault. Ensure that buffer is initialized before
   4 rendering.
   5
   6 The bug can be triggered with: ss -H sport = 100000
   7
   8 Signed-off-by: Jean-Philippe Brucker <jphilippe.brucker@xxxxxxxxx>
   9 ---
  10  misc/ss.c | 7 ++++++-
  11  1 file changed, 6 insertions(+), 1 deletion(-)
  12
  13 diff --git a/misc/ss.c b/misc/ss.c
  14 index e047f9c0..e087bef7 100644
  15 --- a/misc/ss.c
  16 +++ b/misc/ss.c
  17 @@ -1197,10 +1197,15 @@ newline:
  18  /* Render buffered output with spacing and delimiters, then free up buffers */
  19  static void render(int screen_width)
  20  {
  21 -       struct buf_token *token = (struct buf_token *)buffer.head->data;
  22 +       struct buf_token *token;
  23         int printed, line_started = 0;
  24         struct column *f;
  25
  26 +       if (!buffer.head)
  27 +               return;
  28 +
  29 +       token = (struct buf_token *)buffer.head->data;
  30 +
  31         /* Ensure end alignment of last token, it wasn't necessarily flushed */
  32         buffer.tail->end += buffer.cur->len % 2;
  33
  34 --
  35 2.16.2