From: "Brian J. Watson" <Brian.J.Watson@compaq.com>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: fork/open race results in wasted fd
Date: Thu, 31 May 2001 13:40:21 -0700 [thread overview]
Message-ID: <3B16AC35.29944B45@compaq.com> (raw)
Two tasks (A & B) share the same files_struct. A calls open() at the same time
as B calls fork(). After A runs get_unused_fd() but before it calls
fd_install(), B runs copy_files().
It looks like the result is one of the bits is set in B's open_fds field with no
corresponding file pointer in its fd array. The fd is unusable, and attempting
to close() it would return EBADF.
Is this a known race?
-Brian (please copy me in response)
reply other threads:[~2001-05-31 20:47 UTC|newest]
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