Public bug reported:
Ubuntu version: 18.04
bcc version:0.16.17
I found several bugs in bcc , would you help me to check if these bugs are
true?thanks for your patience.
=============================================================================================
step 1 :
In file build/ar/ar.c(build is directory generated by configure) ,
function prev_mapelt line 775 :
Select the false branch at this point (tail->next!=null is
false)
step 2 :
In file build/ar/ar.c(build is directory generated by configure) ,
function prev_mapelt line 777 :
Return null to caller
step 3 :
In file build/ar/ar.c(build is directory generated by configure) ,
function move_in_map line 1332 :
Function prev_mapelt executes and stores the return value to
prev (prev can be null)
step 4 :
In file build/ar/ar.c(build is directory generated by configure) ,
function move_in_map line 1333 :
Store this->next to prev->next
==============================================================================================
step 1 :
In file build/cpp/cpp.c(build is directory generated by configure) ,
function insert_substrings line 1403 :
Allocate memory to rv (lacking failure check, 7 out of 19
memory allocations checked failures)
step 2 :
In file build/cpp/cpp.c(build is directory generated by configure) ,
function insert_substrings line 1403 :
Store 0 to rv
=============================================================================================
step 1 :
In file build/cpp/cpp.c(build is directory generated by configure) ,
function insert_substrings line 1403 :
Allocate memory to rv (lacking failure check, 7 out of 19
memory allocations checked failures)
step 2 :
In file build/cpp/cpp.c(build is directory generated by configure) ,
function insert_substrings line 1457 :
Select the false branch at this point
((cc.0.ph.lcssa25+2)>len.0.ph.ph is false)
step 3 :
In file build/cpp/cpp.c(build is directory generated by configure) ,
function insert_substrings line 1458 :
Store *(data_str) to rv[cc]
===============================================================================================
step 1 :
In file build/cpp/cpp.c(build is directory generated by configure) ,
function gen_substrings line 1271 :
Allocate memory to arg_list (lacking failure check, 7 out of
19 memory allocations checked failures)
step 2 :
In file build/cpp/cpp.c(build is directory generated by configure) ,
function gen_substrings line 1272 :
arg_list is used as the 1st parameter in function memset
(arg_list can be null)
===============================================================================================
step 1 :
In file build/cpp/cpp.c(build is directory generated by configure) ,
function gen_substrings line 1271 :
Allocate memory to arg_list (lacking failure check, 7 out of
19 memory allocations checked failures)
step 2 :
In file build/cpp/cpp.c(build is directory generated by configure) ,
function gen_substrings line 1277 :
Load value from arg_list[ac.0].name
=============================================================================================
** Affects: linux86 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1941975
Title:
Several bugs of Null Pointer Dereference/Unchecked Return Value to
NULL Pointer Dereference
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