commit 6135bc0: [Minor] Lua_pdf: Check sanity

[Vsevolod Stakhov]

Author: Vsevolod Stakhov
Date: 2020-01-25 16:46:04 +0000
URL: https://github.com/rspamd/rspamd/commit/6135bc06fe43b7524f01d45f134f1a85cd4aa3f9 (HEAD -> master)

[Minor] Lua_pdf: Check sanity

---
 lualib/lua_content/pdf.lua | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lualib/lua_content/pdf.lua b/lualib/lua_content/pdf.lua
index 760f042c0..9c09618c0 100644
--- a/lualib/lua_content/pdf.lua
+++ b/lualib/lua_content/pdf.lua
@@ -829,9 +829,9 @@ local function extract_outer_objects(task, input, pdf)
       -- Also get the starting span and try to match it versus obj re to get numbers
       local obj_line_potential = first - 32
       if obj_line_potential < 1 then obj_line_potential = 1 end
-
-      if end_pos > 1 and pdf.end_objects[end_pos - 1] >= obj_line_potential then
-        obj_line_potential = pdf.end_objects[end_pos - 1] + 1
+      local prev_obj_end = pdf.end_objects[end_pos - 1]
+      if end_pos > 1 and prev_obj_end >= obj_line_potential and prev_obj_end < first then
+        obj_line_potential = prev_obj_end + 1
       end
 
       local obj_line_span = input:span(obj_line_potential, first - obj_line_potential + 1)