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prctl.2: The parent death signal is cleared on some credential changes
See kernel/cred.c::commit_creds() in the Linux 5.6 source code. Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -1079,6 +1079,12 @@ or a binary that has associated capabilities (see
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.BR capabilities (7));
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otherwise, this value is preserved across
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.BR execve (2).
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The parent-death signal setting is also cleared upon changes to
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any of the following thread credentials:
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.\" FIXME capability changes can also trigger this; see
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.\" kernel/cred.c::commit_creds inthe Linux 5.6 source.
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effective user ID, effective group ID, filesystem user ID,
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or filesystem group ID.
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.\" prctl PR_GET_PDEATHSIG
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.TP
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.BR PR_GET_PDEATHSIG " (since Linux 2.3.15)"
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