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Subject: [Bug 198500] [gjournal] sysctl kern.geom.journal.cache.limit 32 bit
 integer overflow
Date: Tue, 10 Mar 2015 17:37:18 +0000
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X-Bugzilla-Product: Base System
X-Bugzilla-Component: kern
X-Bugzilla-Version: 11.0-CURRENT
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X-Bugzilla-Severity: Affects Some People
X-Bugzilla-Who: eugen@grosbein.net
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=198500

            Bug ID: 198500
           Summary: [gjournal] sysctl kern.geom.journal.cache.limit 32 bit
                    integer overflow
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: eugen@grosbein.net

sysctl kern.geom.journal.cache.limit shows negative value for FreeBSD/amd64
system having over 4GB RAM. That's due to:

1) the limit being u_int instead of u_long like vm.kmem_size (the limit is 1/2
of vm.kmem_size by default for amd64);
2) sysctl handler g_journal_cache_limit_sysctl() using signed int instead of
long.

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