https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81939
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-08-30
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
With an instrumented gfortran (Configured with: ../work/configure
--prefix=/opt/gcc/gcc8g --enable-languages=c,c++,fortran --with-gmp=/opt/mp-new
--with-system-zlib --with-isl=/opt/mp-new --disable-bootstrap
--disable-multilib --disable-libstdcxx CFLAGS='-L/opt/gcc/gcc8w/lib -lasan
-lubsan -fsanitize=address,undefined,leak -Og -g -fno-omit-frame-pointer'
CXXFLAGS='-fsanitize=address,undefined,leak -Og -g -fno-omit-frame-pointer'
LDFLAGS='-L/opt/gcc/gcc8w/lib -lasan -lubsan -ldl -lpthread'
) I get at runtime
=================================================================
==11558==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x6120000002f7 at pc 0x000104bf6a23 bp 0x7fff5b70eec0 sp 0x7fff5b70eeb8
WRITE of size 1 at 0x6120000002f7 thread T0
#0 0x104bf6a22 in build_float_string
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x702a22)
#1 0x104bf7cd6 in get_float_string
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x703cd6)
#2 0x104bfa687 in write_float_0
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x706687)
#3 0x104bfc83e in _gfortrani_write_f
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x70883e)
#4 0x104bd08b5 in formatted_transfer_scalar_write
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x6dc8b5)
#5 0x104bd32fe in formatted_transfer
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x6df2fe)
#6 0x104bbf67a in _gfortran_transfer_real
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x6cb67a)
#7 0x104bbf69b in _gfortran_transfer_real_write
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x6cb69b)
#8 0x1044edcdf in MAIN__
(/Users/dominiq/Documents/Fortran/g95bench/win/f90/bug/a.out+0x100000cdf)
#9 0x1044ede7c in main
(/Users/dominiq/Documents/Fortran/g95bench/win/f90/bug/a.out+0x100000e7c)
#10 0x7fffbcb65234 in start (/usr/lib/system/libdyld.dylib+0x5234)
0x6120000002f7 is located 0 bytes to the right of 311-byte region
[0x6120000001c0,0x6120000002f7)
allocated by thread T0 here:
#0 0x10606877d in wrap_malloc (/opt/gcc/gcc7a/lib/libasan.4.dylib+0x6377d)
#1 0x1044f7541 in _gfortrani_xmalloc
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x3541)
#2 0x104bef354 in select_string
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x6fb354)
#3 0x104bfa5fc in write_float_0
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x7065fc)
#4 0x104bfc83e in _gfortrani_write_f
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x70883e)
#5 0x104bd08b5 in formatted_transfer_scalar_write
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x6dc8b5)
#6 0x104bd32fe in formatted_transfer
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x6df2fe)
#7 0x104bbf67a in _gfortran_transfer_real
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x6cb67a)
#8 0x104bbf69b in _gfortran_transfer_real_write
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x6cb69b)
#9 0x1044edcdf in MAIN__
(/Users/dominiq/Documents/Fortran/g95bench/win/f90/bug/a.out+0x100000cdf)
#10 0x1044ede7c in main
(/Users/dominiq/Documents/Fortran/g95bench/win/f90/bug/a.out+0x100000e7c)
#11 0x7fffbcb65234 in start (/usr/lib/system/libdyld.dylib+0x5234)
SUMMARY: AddressSanitizer: heap-buffer-overflow
(/opt/gcc/gcc7gp/lib/libgfortran.4.dylib+0x702a22) in build_float_string
Shadow bytes around the buggy address:
0x1c2400000000: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x1c2400000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x1c2400000020: 00 00 00 00 00 00 00 00 00 00 fa fa fa fa fa fa
0x1c2400000030: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x1c2400000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x1c2400000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00[07]fa
0x1c2400000060: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x1c2400000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x1c2400000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fa
0x1c2400000090: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x1c24000000a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==11558==ABORTING
Program received signal SIGABRT: Process abort signal.
Also present in gcc7.
