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Subject: [Bug 224103] A possible out of bounds of memory in
 netinet/libalias/alias_sctp.c.
Date: Tue, 05 Dec 2017 07:14:38 +0000
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X-Bugzilla-Type: new
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X-Bugzilla-Product: Base System
X-Bugzilla-Component: kern
X-Bugzilla-Version: CURRENT
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X-Bugzilla-Severity: Affects Some People
X-Bugzilla-Who: logwang@tencent.com
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224103

            Bug ID: 224103
           Summary: A possible out of bounds of memory in
                    netinet/libalias/alias_sctp.c.
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: logwang@tencent.com

In AliasSctpInit():
    la->sctpNatTimer.TimerQ =3D sn_calloc(SN_TIMER_QUEUE_SIZE, sizeof(struct
sctpTimerQ));

since SN_TIMER_QUEUE_SIZE is defined as SN_MAX_TIMER+2, and sn_calloc is
defined as sn_malloc(x * n) if _SYS_MALLOC_H_ is defined, the size of callo=
ced
memory will be wrong, because the macro will be expanded to
SN_MAX_TIMER+2*sizeof(struct sctpTimerQ).

This was found when i compiled the code on Linux, i don't know whether it's=
 a
problem or not if compiled on FreeBSD system.

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