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    Subjectopening symlinks with O_CREAT under latest 2.5.74
    Hi,
    couple of things stopped working on my box
    where I have /dev/vc/XX as symlinks to /dev/ttyXX, and some
    things use /dev/vc/XX and some /dev/ttyXX. After last update
    hour ago things which use /dev/vc/XX stopped working for
    non-root - they now fail with EACCES error if they attempt
    to redirect its input or output through '>' or '<>' bash
    redirection operators:

    $ touch /tmp/xx
    $ ln -s /tmp/xx yy
    $ cat > yy
    -bash: yy: Permission denied

    Strace says:

    [pid 3268] open("yy", O_WRONLY|O_CREAT|O_TRUNC|O_LARGEFILE, 0666) = -1 EACCES (Permission denied)

    This command succeeds on kernel from thursday. Simillar problem is
    that

    $ rm /tmp/xx
    $ ln -s /tmp/xx yy
    $ cat > yy
    -bash: yy: No such file or directory

    while it creates /tmp/xx file on older kernels.

    Currently I suspect Trond's LOOKUP_CONTINUE change in
    '[PATCH] Add open intent information to the 'struct nameidata', but I
    did not tried reverting it yet to find whether it is culprit or no. But
    other changes than these four from Trond looks completely innocent.
    Thanks,
    Petr Vandrovec
    vandrove@vc.cvut.cz


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