cvs commit: src/sys/kern vfs_aio.c src/sys/sys event.h

Jean-Sebastien Pedron dumbbell at
Mon Jan 28 02:43:11 PST 2008

dumbbell    2008-01-28 10:43:11 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7_0)
    sys/kern             vfs_aio.c 
    sys/sys              event.h 
    sys/kern/vfs_aio.c; revision 1.237
    sys/sys/event.h; revision 1.38
    When asked to use kqueue, AIO stores its internal state in the
    `kn_sdata' member of the newly registered knote. The problem is that
    this member is overwritten by a call to kevent(2) with the EV_ADD flag,
    targetted at the same kevent/knote. For instance, a userland application
    may set the pointer to NULL, leading to a panic.
    A testcase was provided by the submitter.
    PR:   kern/118911
    Submitted by: MOROHOSHI Akihiko <moro at>
  Approved by:    re (kensmith)
  Revision   Changes    Path  +6 -4      src/sys/kern/vfs_aio.c   +2 -0      src/sys/sys/event.h

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