K 10 svn:author V 5 jamie K 8 svn:date V 27 2021-02-19T21:50:26.310676Z K 7 svn:log V 691 MFC jail: Handle a possible race between jail_remove(2) and fork(2) jail_remove(2) includes a loop that sends SIGKILL to all processes in a jail, but skips processes in PRS_NEW state. Thus it is possible the a process in mid-fork(2) during jail removal can survive the jail being removed. Add a prison flag PR_REMOVE, which is checked before the new process returns. If the jail is being removed, the process will then exit. Also check this flag in jail_attach(2) which has a similar issue. Reported by: trasz Approved by: kib (cherry picked from commit cc7b73065302005ebc4a19503188c8d6d5eb923d) Git Hash: c837631bd47af73d03e3d8907f1e58b88403007c Git Author: jamie@FreeBSD.org END