[Bug-readline] NULL dereferences may leads to segmentation fault in readline-6.2/histexpand.c and readline-6.2/search.c

[Pankaj Sharma]

Hi,

Release: readline-6.2

Machine : Linux 2.6.32-220.el6.x86_64

Explanation:

There are 3 issues, are identified for NULL dereferences may leads to segmentation fault in below function with respective file:

file name:

1. calling " char * get_history_event (string, caller_index, delimiting_quote)", it Dereferencing a pointer that might be null "entry" by "called current_history ();" in  file :readline-6.2/histexpand.c

2. calling " make_history_line_current (HIST_ENTRY*) ", it Dereferencing a pointer that might be null "entry" by "called current_history ();" in  file :readline-6.2/search.c

3. and  when calling "int rl_history_search_internal (count, dir)  int count, dir ; ", it Dereferencing a pointer that might be null "temp"  by "called current_history (); "in  file :readline-6.2/search.c

Solution:

So ,I have applied a fixes for NULL Check .the respective patches has been attached. 

Please review it and give your concern.

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Regards,

Pankaj Sharma, Ravish Sachdeva

Samsung India Electronics Pvt. Ltd.

 

readline-6.2.patch
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