Date: Wed, 20 Jun 2001 03:06:28 -0700 (PDT) From: Brian Somers <brian@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/net if_tun.c Message-ID: <200106201006.f5KA6Sq43409@freefall.freebsd.org>
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brian 2001/06/20 03:06:28 PDT
Modified files:
sys/net if_tun.c
Log:
Close a race where we were releasing the unit resource at the start
of tunclose() rather than the end, and tunopen() grabbed that unit
before tunclose() finished (one process is allocating it while another
is freeing it!).
It may be worth hanging some sort of rw mutex around all specinfo
calls where d_close and the detach handler get a write lock and all
other functions get a read lock. This would guarantee certain levels
of ``atomicity'' (is that a word?) that people may expect (I believe
Solaris does something like this).
Revision Changes Path
1.96 +5 -3 src/sys/net/if_tun.c
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