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PSPP-BUG: [bug #61257] segv in pspp at rank.c:244

From: Irfan Ariq
Subject: PSPP-BUG: [bug #61257] segv in pspp at rank.c:244
Date: Thu, 30 Sep 2021 16:22:34 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36


                 Summary: segv in pspp at rank.c:244
                 Project: PSPP
            Submitted by: irfanariq
            Submitted on: Thu 30 Sep 2021 08:22:32 PM UTC
                Category: None
                Severity: 5 - Average
                  Status: None
             Assigned to: None
             Open/Closed: Open
                 Release: None
         Discussion Lock: Any
                  Effort: 0.00




We are currently working on fuzz testing feature, and we found a **SEGV** on

The stack traces are as follow:
==29432==ERROR: AddressSanitizer: SEGV on unknown address 0x00000000023e (pc
0x7f0927fda525 bp 0x7ffc302e4dd0 sp 0x7ffc302e4d80 T0)
==29432==The signal is caused by a WRITE memory access.
==29432==Hint: address points to the zero page.
    #0 0x7f0927fda524  (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x26524)
    #1 0x7f0928092772 in __interceptor_free
    #2 0x7f0927caae81 in destroy_rank src/language/stats/rank.c:244
    #3 0x7f0927cae651 in cmd_rank src/language/stats/rank.c:884
    #4 0x7f0927bdbd63 in do_parse_command src/language/command.c:233
    #5 0x7f0927bdb809 in cmd_parse_in_state src/language/command.c:147
    #6 0x7f0927bdb8d9 in cmd_parse src/language/command.c:162
    #7 0x556437d8ce30 in main src/ui/terminal/main.c:136
The full stack trace is attached.

**Step to reproduce**

We configured `pspp` using `CFLAGS="-g -O0 -fsanitize=address" CXXFLAGS="-g
-O0 -fsanitize=address" ./configure --prefix=$(pwd)/ --without-cairo
--without-perl-module` and built in using `make -j10`, and run it with:

./pspp <attached file> -e -V -I- -I -a --no-output device=treminal format=
The input file is attached.

- OS: Ubuntu 18.04.5 LTS
- GCC version: gcc 7.5.0
- pspp version: [pspp

Thank you.


File Attachments:

Date: Thu 30 Sep 2021 08:22:32 PM UTC  Name: full_stacktrace_poc_6.zip  Size:
729B   By: irfanariq

Date: Thu 30 Sep 2021 08:22:32 PM UTC  Name: input_pspp_poc_6.zip  Size: 650B 
 By: irfanariq



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