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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libquadmath/99203] Undefined behaviour in libquadmath file print_fp.c function __quadmath_printf_fp
Date: Tue, 23 Feb 2021 08:59:54 +0000 [thread overview]
Message-ID: <bug-99203-4-5n8gClMLgs@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-99203-4@http.gcc.gnu.org/bugzilla/>
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
next prev parent reply other threads:[~2021-02-23 8:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-22 15:57 [Bug libquadmath/99203] New: " zeccav at gmail dot com
2021-02-23 8:59 ` marxin at gcc dot gnu.org [this message]
2021-12-17 9:33 ` [Bug libquadmath/99203] " fxcoudert at gcc dot gnu.org
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