https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=238326
--- Comment #22 from Zhenlei Huang <zlei.hu...@gmail.com> --- (In reply to Kyle Evans from comment #20) Steps to reproduce the kernel panic: Host environment: FreeBSD 12.2 Guest fresh install with kernel debug symbols, VMware Fusion 12.1.0, hardware configured with 4 Processor cores and 1G memory, system updated to 12.2-RELEASE-p3. Host and jail's /etc/rc.conf: ------------- rc.conf ------------------ # The jails share this rc.conf, let's disable the syslog service syslogd_enable="NO" #syslogd_flags="-ss" sendmail_enable="NONE" hostname="" ifconfig_em0="DHCP" dumpdev="AUTO" zfs_enable="YES" ---------------------------------------- Host's /etc/jail.conf: ------------ jail.conf ----------------- # template for all test jails # it is convenient to share host's filesystem path = "/"; exec.clean; vnet = new; vnet.interface = "epair${ifnum}b"; exec.prepare = "/sbin/ifconfig epair${ifnum} create"; exec.prepare += "/sbin/ifconfig epair${ifnum}a inet 192.168.${ifnum}.1/24 up"; exec.start = "/bin/sh /etc/rc"; # I've no ideas why opening and binding a socket would trigger the kernel panic more likely :( exec.start += "/usr/sbin/daemon /usr/bin/nc -l 0.0.0.0 9999"; exec.start += "/sbin/ifconfig epair${ifnum}b inet 192.168.${ifnum}.2/24"; exec.start += "/sbin/route add default 192.168.${ifnum}.1"; exec.stop = "/bin/sh /etc/rc.shutdown"; exec.poststop += "/sbin/ifconfig epair${ifnum}a destroy"; test1 { $ifnum = 10; } # with more jails it seems crash the host more likely test2 { $ifnum = 20; } ---------------------------------------- Then repeat stopping and starting jail service, the host crashes about once in 2 or 3 times. # service jail onestart && service jail onestop ... The kernel panic message: Fatal trap 12: page fault while in kernel mode cpuid = 2; apic id = 04 fault virtual address = 0x410 fault code = supervisor read data, page not present instruction pointer = 0x20:0xffffffff80b9f237 stack pointer = 0x28:0xfffffe0015b55370 frame pointer = 0x28:0xfffffe0015b553f0 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 93087 (ifconfig) trap number = 12 panic: page fault cpuid = 2 time = 1612193992 KDB: stack backtrace: #0 0xffffffff80c0aa85 at kdb_backtrace+0x65 #1 0xffffffff80bbed3b at vpanic+0x17b #2 0xffffffff80bbebb3 at panic+0x43 #3 0xffffffff8108e911 at trap_fatal+0x391 #4 0xffffffff8108e96f at trap_pfault+0x4f #5 0xffffffff8108dfb6 at trap+0x286 #6 0xffffffff81066938 at calltrap+0x8 #7 0xffffffff80bb9591 at _rm_rlock_hard+0x3c1 #8 0xffffffff80ce5ce6 at rtinit+0x2a6 #9 0xffffffff80d3873e at in_scrubprefix+0x29e #10 0xffffffff80d5001d at rip_ctlinput+0x8d #11 0xffffffff80c4922c at pfctlinput+0x5c #12 0xffffffff80cbb4fa at if_down+0x12a #13 0xffffffff80cb90d0 at if_detach_internal+0x150 #14 0xffffffff80cb8df0 at if_detach+0x50 #15 0xffffffff82b1ebb1 at epair_clone_destroy+0x81 #16 0xffffffff80cc0c4d at if_clone_destroyif+0xdd #17 0xffffffff80cc0b12 at if_clone_destroy+0x1a2 Uptime: 1m22s Dumping 160 out of 982 MB:..10%..20%..30%..40%..50%..60%..70%..80%..90%..100% To be clear, after update to 12.2-RELEASE-p3, it's difficult to crash the host without the below line in jail.conf: exec.start += "/usr/sbin/daemon /usr/bin/nc -l 0.0.0.0 9999"; I'll attach full core text dump later. -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ freebsd-jail@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-jail To unsubscribe, send any mail to "freebsd-jail-unsubscr...@freebsd.org"