From: "홍신 shin hong" <hongshin@gmail.com>
To: matthew@wil.cx, linux-fsdevel@vger.kernel.org
Subject: a suspected race at __posix_lock_file()
Date: Fri, 24 Jul 2009 14:56:24 +0900 [thread overview]
Message-ID: <2014bcab0907232256y18f98816r15464c024a934ae7@mail.gmail.com> (raw)
Hi. I found a suspected race condition bug at fs/locks/__posix_lock_file()
in recent Linux kernel.
This bug is similar to the one reported in ChangeLog 2.6.24 ( commit
85c59580b30c82aa771aa33b37217a6b6851bc14 ).
Big Kernel Lock(BKL) might be released and re-taken
at the call site of locks_delete_lock()
since Releasing-On-Block semantics of BKL.
Locks_delete_lock() may be blocked by kmem_cache_alloc() invocation.
Please examine the possbility of race condition of this code
and let me know your opinion.
next reply other threads:[~2009-07-24 5:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-24 5:56 홍신 shin hong [this message]
2009-07-26 22:20 ` a suspected race at __posix_lock_file() Matthew Wilcox
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