From 76181ae940c485d80990941d064f8fdc26b3b4ee Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@gmail.com>
Date: Sun, 2 Jan 2022 11:44:45 +0900
Subject: [ruby/reline] Check capname of tigetstr/tigetflag/tigetnum

Incorrect arguments can cause SEGV.

https://github.com/ruby/reline/commit/a58748bcf9
---
 lib/reline/terminfo.rb | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'lib/reline')

diff --git a/lib/reline/terminfo.rb b/lib/reline/terminfo.rb
index 95ff082172..b053ba82c4 100644
--- a/lib/reline/terminfo.rb
+++ b/lib/reline/terminfo.rb
@@ -121,6 +121,7 @@ module Reline::Terminfo
   end
 
   def self.tigetstr(capname)
+    raise TerminfoError, "capname is not String: #{capname.inspect}" unless capname.is_a?(String)
     capability = @tigetstr.(capname)
     case capability.to_i
     when 0, -1
@@ -138,6 +139,7 @@ module Reline::Terminfo
   end
 
   def self.tigetflag(capname)
+    raise TerminfoError, "capname is not String: #{capname.inspect}" unless capname.is_a?(String)
     flag = @tigetflag.(capname).to_i
     case flag
     when -1
@@ -149,6 +151,7 @@ module Reline::Terminfo
   end
 
   def self.tigetnum(capname)
+    raise TerminfoError, "capname is not String: #{capname.inspect}" unless capname.is_a?(String)
     num = @tigetnum.(capname).to_i
     case num
     when -2
-- 
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