https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104999
Bug ID: 104999
Summary: [12 Regression] runtime error: pointer index
expression with base 0x00000cf67720 overflowed to
0xffffffffea627728
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Blocks: 63426
Target Milestone: ---
Happens for gfortran.dg/simplify_cshift_1.f90 test-case:
Reduced to:
$ cat c.f90
program foo
type t
end type t
integer, parameter :: a(5) = [1, 2, 3, 4, 5]
integer i, b(5), c(5), v(5)
if (any(b /= v)) STOP 1
b = cshift(a, 2)
end program foo
$ ./xgcc -B. c.f90 -c
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/simplify.cc:2239:12:
runtime error: pointer index expression with base 0x00000cf01270 overflowed to
0xffffffffea5c1278
#0 0xd4c8cd in gfc_simplify_cshift(gfc_expr*, gfc_expr*, gfc_expr*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/simplify.cc:2239
#1 0xb41c2d in do_simplify
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/intrinsic.cc:4676
#2 0xb5513e in gfc_intrinsic_func_interface(gfc_expr*, int)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/intrinsic.cc:5055
#3 0xcd35fa in resolve_unknown_f
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/resolve.cc:2978
#4 0xcd35fa in resolve_function
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/resolve.cc:3335
#5 0xcd35fa in gfc_resolve_expr(gfc_expr*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/resolve.cc:7175
#6 0xcd35fa in gfc_resolve_expr(gfc_expr*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/resolve.cc:7137
#7 0xd05c2d in gfc_resolve_code(gfc_code*, gfc_namespace*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/resolve.cc:11937
#8 0xd1d868 in resolve_codes
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/resolve.cc:17551
#9 0xca8648 in gfc_resolve(gfc_namespace*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/resolve.cc:17586
#10 0xca8648 in gfc_resolve(gfc_namespace*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/resolve.cc:17565
#11 0xc60014 in resolve_all_program_units
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/parse.cc:6586
#12 0xc60014 in gfc_parse_file()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/parse.cc:6842
#13 0xe0406e in gfc_be_parse_file
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/fortran/f95-lang.cc:216
#14 0x2b5d560 in compile_file
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/toplev.cc:452
#15 0x9d8419 in do_compile
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/toplev.cc:2168
#16 0x9d8419 in toplev::main(int, char**)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/toplev.cc:2320
#17 0x9dda41 in main
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/build/gcc/main.cc:39
#18 0x7ffff78a362f in __libc_start_call_main
../sysdeps/nptl/libc_start_call_main.h:58
#19 0x7ffff78a36ef in __libc_start_main_impl ../csu/libc-start.c:392
#20 0x9ddca4 in _start
(/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-ubsan/objdir/gcc/f951+0x9ddca4)
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined
