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* [Bug libquadmath/99203] New: Undefined behaviour in libquadmath file print_fp.c function __quadmath_printf_fp
@ 2021-02-22 15:57 zeccav at gmail dot com
2021-02-23 8:59 ` [Bug libquadmath/99203] " marxin at gcc dot gnu.org
2021-12-17 9:33 ` fxcoudert at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: zeccav at gmail dot com @ 2021-02-22 15:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99203
Bug ID: 99203
Summary: Undefined behaviour in libquadmath file print_fp.c
function __quadmath_printf_fp
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libquadmath
Assignee: unassigned at gcc dot gnu.org
Reporter: zeccav at gmail dot com
Target Milestone: ---
! from fmt_en.f90
! must be compiled and run
! gfortran compiler needs not be sanitized
! must load sanitized libquadmath.so.0
! ldd a.out -> libquadmath.so.0 =>
/home/vitti/local/gcc-150221-undefined/lib64/libquadmath.so.0
!../../../gcc-150221/libquadmath/printf/printf_fp.c:762:4: runtime error:
passing zero to ctz(), which is not a valid argument
!../../../gcc-150221/libquadmath/printf/printf_fp.c:762: runtime error: passing
zero to ctz(), which is not a valid argument
! printf_fp.c:762 -> "count_trailing_zeros (cnt_l, tmp[0]);"
write(*, "(en15.2)") real(-.44444,kind=10)
write(*, "(en15.2)") real(-.44444,kind=16)
end
^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug libquadmath/99203] Undefined behaviour in libquadmath file print_fp.c function __quadmath_printf_fp 2021-02-22 15:57 [Bug libquadmath/99203] New: Undefined behaviour in libquadmath file print_fp.c function __quadmath_printf_fp zeccav at gmail dot com @ 2021-02-23 8:59 ` marxin at gcc dot gnu.org 2021-12-17 9:33 ` fxcoudert at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: marxin at gcc dot gnu.org @ 2021-02-23 8:59 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99203 Martin Liška <marxin at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Blocks| |63426 Ever confirmed|0 |1 CC| |jakub at gcc dot gnu.org, | |marxin at gcc dot gnu.org Status|UNCONFIRMED |NEW Last reconfirmed| |2021-02-23 --- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> --- Confirmed, full backtrace: /home/marxin/Programming/gcc2/libquadmath/printf/printf_fp.c:762:4: runtime error: passing zero to ctz(), which is not a valid argument #0 0x7ffff719692b in __quadmath_printf_fp /home/marxin/Programming/gcc2/libquadmath/printf/printf_fp.c:762 #1 0x7ffff71d6884 in quadmath_snprintf /home/marxin/Programming/gcc2/libquadmath/printf/quadmath-printf.c:266 #2 0x7ffff75ccbab (/usr/lib64/libgfortran.so.5+0x252bab) #3 0x7ffff75d07df (/usr/lib64/libgfortran.so.5+0x2567df) #4 0x7ffff75c72b4 (/usr/lib64/libgfortran.so.5+0x24d2b4) #5 0x7ffff75c7973 (/usr/lib64/libgfortran.so.5+0x24d973) #6 0x400d85 in checkfmt.0 (/home/marxin/Programming/testcases/a.out+0x400d85) #7 0x40160e in MAIN__ (/home/marxin/Programming/testcases/a.out+0x40160e) #8 0x4024e6 in main (/home/marxin/Programming/testcases/a.out+0x4024e6) #9 0x7ffff6fc9b24 in __libc_start_main (/lib64/libc.so.6+0x27b24) #10 0x40096d in _start (/home/marxin/Programming/testcases/a.out+0x40096d) Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426 [Bug 63426] [meta-bug] Issues found with -fsanitize=undefined ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug libquadmath/99203] Undefined behaviour in libquadmath file print_fp.c function __quadmath_printf_fp 2021-02-22 15:57 [Bug libquadmath/99203] New: Undefined behaviour in libquadmath file print_fp.c function __quadmath_printf_fp zeccav at gmail dot com 2021-02-23 8:59 ` [Bug libquadmath/99203] " marxin at gcc dot gnu.org @ 2021-12-17 9:33 ` fxcoudert at gcc dot gnu.org 1 sibling, 0 replies; 3+ messages in thread From: fxcoudert at gcc dot gnu.org @ 2021-12-17 9:33 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99203 Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |fxcoudert at gcc dot gnu.org --- Comment #2 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> --- This is present in upstream (glibc), probably should be reported there: https://sourceware.org/git/?p=glibc.git;a=blob;f=stdio-common/printf_fp.c;h=75bbadbaeb6cdc55f09ab3e806cc9ab3e958c2e6;hb=HEAD ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-12-17 9:33 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-02-22 15:57 [Bug libquadmath/99203] New: Undefined behaviour in libquadmath file print_fp.c function __quadmath_printf_fp zeccav at gmail dot com 2021-02-23 8:59 ` [Bug libquadmath/99203] " marxin at gcc dot gnu.org 2021-12-17 9:33 ` fxcoudert at gcc dot gnu.org
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