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List:       r-devel
Subject:    Re: [Rd] Null pointer dereference in Rf_isVector()
From:       luke-tierney () uiowa ! edu
Date:       2018-06-29 20:19:36
Message-ID: alpine.DEB.2.20.1806291519130.9156 () luke-Latitude-7480
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Thanks for the report. Fixed in R-devel and R-patched.

Best,

luke

On Thu, 28 Jun 2018, kamil@frankowicz.me wrote:

> Hello,
> 
> After some fuzz testing I found a problem with Rf_isVector() function in R 
> 3.5.0.
> 
> Platform: Ubuntu 16.04
> Compiler: Clang-4.0 (from Ubuntu's repository) + ASAN
> 
> Crashing R code:
> 
> structure(c(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
> 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
> 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
> 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, \
> 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),.Dim=c(53,4),.Dimnames=~((0)))
>  
> To reproduce:
> 1. Save crashing code to file.
> 2. Run it with command: Rscript --vanilla r_nullptr_Rf_isVector
> 
> ASAN Report:
> 
> ==11608==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000002 (pc 
> 0x0000005cc479 bp 0x000000000000 sp 0x7fff7a56d770 T0)
> ==11608==The signal is caused by a READ memory access.
> ==11608==Hint: address points to the zero page.
> #0 0x5cc478 in Rf_isVector 
> R-3.5.0/src/main/../../src/include/Rinlinedfuns.h:857:12
> #1 0x5cc478 in Rf_dimnamesgets R-3.5.0/src/main/attrib.c:1099
> #2 0x5c4f72 in Rf_setAttrib R-3.5.0/src/main/attrib.c:259:9
> #3 0x5db48d in do_attributesgets R-3.5.0/src/main/attrib.c:1373:6
> #4 0x84b939 in bcEval R-3.5.0/src/main/eval.c:7082:12
> #5 0x8171df in Rf_eval R-3.5.0/src/main/eval.c:624:8
> #6 0x8669a2 in R_execClosure R-3.5.0/src/main/eval.c
> #7 0x817d7f in Rf_eval R-3.5.0/src/main/eval.c:747:12
> #8 0x93cfa4 in Rf_ReplIteration R-3.5.0/src/main/main.c:258:2
> #9 0x941e7a in R_ReplConsole R-3.5.0/src/main/main.c:308:11
> #10 0x941e7a in run_Rmainloop R-3.5.0/src/main/main.c:1082
> #11 0x50080a in main R-3.5.0/src/main/Rmain.c:29:5
> #12 0x7fd74d55c82f in __libc_start_main 
> (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
> #13 0x42cf88 in _start (R-3.5.0/bin/exec/R+0x42cf88)
> 
> AddressSanitizer can not provide additional info.
> SUMMARY: AddressSanitizer: SEGV 
> R-3.5.0/src/main/../../src/include/Rinlinedfuns.h:857:12 in Rf_isVector
> ==11608==ABORTING
> 
> Best Regards,
> Kamil Frankowicz
> 
> ______________________________________________
> R-devel@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
> 

-- 
Luke Tierney
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
241 Schaeffer Hall                  email:   luke-tierney@uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu

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