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Tue, 25 Mar 2025 19:26:18 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 285658] [PATCH] SIGFPE in /usr/bin/primes Date: Tue, 25 Mar 2025 19:26:18 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: 13.5-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: mfp49_freebsd@plass-family.net X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter attachments.created Message-ID: Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@FreeBSD.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D285658 Bug ID: 285658 Summary: [PATCH] SIGFPE in /usr/bin/primes Product: Base System Version: 13.5-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: mfp49_freebsd@plass-family.net Created attachment 259027 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D259027&action= =3Dedit Fix crash in /usr/bin/primes Here is one example: $ /usr/bin/primes 5000000000 5000000099 Floating point exception $=20 I tracked down the problem to the do-while loop in src/usr.bin/primes/prime= s.c, which can run beyond the end of the primes[] array when fact_lim >=3D *pr_l= imit; in my case the fetched value is zero, leading to an integer divide-by-zero. This bug appears to be quite old. Possibly it has been masked by the presence of non-zero memory after the primes array. A patch (against CURRENT) is attached. --=20 You are receiving this mail because: You are the assignee for the bug.=