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pid_namespaces.7: Other call sequences fail with multiple threads and CLONE_NEWPID 

Reported-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2013-03-01 09:24:11 +01:00
parent 2a4b78e7e2
commit ec411de6d5
1 changed files with 7 additions and 1 deletions
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8
man7/pid_namespaces.7
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@ -197,14 +197,20 @@ the parent of a process is either in the same namespace
or resides in the immediate parent PID namespace.
Every thread in a process must be in the same PID namespace.
For this reason, the two following call sequences will fail:
For this reason, the following call sequences will fail:
.nf
unshare(CLONE_NEWPID);
clone(..., CLONE_VM, ...); /* Fails */
clone(..., CLONE_VM, ...);
unshare(CLONE_NEWPID); /* Fails */
setns(fd, CLONE_NEWPID);
clone(..., CLONE_VM, ...); /* Fails */
clone(..., CLONE_VM, ...);
setns(fd, CLONE_NEWPID); /* Fails */
.fi
Because the above