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    SubjectRe: [PATCH] Reset current->pdeath_signal on SUID binary execution

    >> the attached patch fixes a flaw in the "parent process death signal"
    >> when executing SUID binaries. An unprivileged user may send arbitrary
    >> signal to a child process even if it is running with higher privileges.
    >> The idea to fix this issue is to reset pdeath_signal not only on fork,
    >> but also on the execution of a SUID binary.
    >> Michael, if we fix it this way, then the prctl() manual page should
    >> reflect that behavior.
    > the patch has been merged into 2.4 and 2.6, so the manual page needs an
    > update at some point.

    I see your patch at:

    But it's not clear to me in which 2.4.x and 2.6.x versions the change occurred (it isn't in 2.6.23-rc3 -- is it scheduled
    for 2.6.23-rc4?). Can you enlighten me?



    >> From comments it seems that we have to also reset pdeath_signal inside
    >> LSM when it comes to capability-raised executes, but I must admit that I
    >> got lost there.
    > No further comments for this one? I am not familiar enough with it.
    > Regards
    > Marcel

    Michael Kerrisk
    maintainer of Linux man pages Sections 2, 3, 4, 5, and 7

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