https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285658
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: [email protected]
Reporter: [email protected]
Created attachment 259027
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=259027&action=edit
Fix crash in /usr/bin/primes
Here is one example:
$ /usr/bin/primes 5000000000 5000000099
Floating point exception
$
I tracked down the problem to the do-while loop in src/usr.bin/primes/primes.c,
which can run beyond the end of the primes[] array when fact_lim >= *pr_limit;
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.
--
You are receiving this mail because:
You are the assignee for the bug.
