Date: Fri, 08 May 2026 20:22:17 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 295107] Concurrent jail starts fail when invoked via rc.d Message-ID: <bug-295107-227@https.bugs.freebsd.org/bugzilla/>
index | next in thread | raw e-mail
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295107 Bug ID: 295107 Summary: Concurrent jail starts fail when invoked via rc.d Product: Base System Version: 15.0-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: sears@cs.berkeley.edu /etc/rc.d/jail incorrectly uses the process name 'jail' to see if the jail it is attempting to start is already running. 'jail' is a short-lived CLI tool, so if you run two jail starts (for instance) at the same time, the helpers in rc.subr spuriously conclude that the jail has been started. I have scripts that reproduce the issue + test the fix, but they are AI-generated. I'll include them if requested. (I'm not sure how far the AI contribution policy extends.) I ran them against 15.0-RELEASE, and don't see any recent changes to /etc/rc.d/jail or any relevant-looking changes to rc.subr The tests just start two different jails concurrently, each with a "sleep 1" in an exec.prestart. One of the two always fails with an 'already running' error. I did not notice any obvious problems when two jails are allowed to start at the same time. (The underlying tools and kernel mechanisms seem to do the right thing.) The fix is one line. Add this comment + line to /etc/rc.d/jail above 'jail_svcj="NO"', and below 'load_rc_config $name': # Choose a non-matching string for procname to prevent rc.subr from defaulting # to "jail". Without this, operations against unrelated jails conflict if they # both (or a user) are running the 'jail' cli tool concurrently. procname=: -- You are receiving this mail because: You are the assignee for the bug.home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-295107-227>