Messages in this thread | | | Subject | Re: DoS with POSIX file locks? | From | Miklos Szeredi <> | Date | Tue, 21 Mar 2006 10:44:25 +0100 |
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> The _only_ sane way to solve it is to decree that you lose your locks if > you clone(CLONE_FILES) and then call exec(). If there are any > applications out there that rely on the current behaviour,
Apps using LinuxThreads seem to be candidates:
According to POSIX 1003.1c, a successful `exec*' in one of the threads should automatically terminate all other threads in the program. This behavior is not yet implemented in LinuxThreads. Calling `pthread_kill_other_threads_np' before `exec*' achieves much of the same behavior, except that if `exec*' ultimately fails, then all other threads are already killed.
steal_locks() was probably added as a workaround for this case, no?
I wonder how many installations still run LinuxThreads with 2.6 kernels.
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