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Original Message
Subject: fuzz tested user mode linux core dumps in fs/lockd/clntproc.c:131
Date: Sat, 27 Jul 2013 12:03:20 +0200
From: Toralf Förster
To: Andrey Vagin , Oleg Nesterov , "Eric
W. Biederman" , Andrey Vagin , Al
Viro
CC: Linux NFS mailing
Useful for
* limiting privileges
* opening block devices O_EXCL
Use dup to work around the fact /proc/self/fd
can't be opened after dropping privileges.
This proc behaviour doesn't match TLPI and might be a bug.
Qemu has a slightly more complex fdset approach
that provides fds with different acce
