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authorEric W. Biederman <ebiederm@xmission.com>2012-12-21 07:26:06 +0400
committerEric W. Biederman <ebiederm@xmission.com>2012-12-25 10:53:14 +0400
commit8382fcac1b813ad0a4e68a838fc7ae93fa39eda0 (patch)
treea484c6a712a7361a07d9514ea86f835b70ad3414 /include/linux/pid.h
parenta49f0d1ea3ec94fc7cf33a7c36a16343b74bd565 (diff)
downloadlinux-8382fcac1b813ad0a4e68a838fc7ae93fa39eda0.tar.xz
pidns: Outlaw thread creation after unshare(CLONE_NEWPID)
The sequence: unshare(CLONE_NEWPID) clone(CLONE_THREAD|CLONE_SIGHAND|CLONE_VM) Creates a new process in the new pid namespace without setting pid_ns->child_reaper. After forking this results in a NULL pointer dereference. Avoid this and other nonsense scenarios that can show up after creating a new pid namespace with unshare by adding a new check in copy_prodcess. Pointed-out-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'include/linux/pid.h')
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