Date: Tue, 19 Dec 2023 14:24:23 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 275840] ifconfig tun<n> destroy deadlock Message-ID: <bug-275840-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275840 Bug ID: 275840 Summary: ifconfig tun<n> destroy deadlock Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: rscheff@freebsd.org While understanding PR275798 and making heavy use of packetdrill (which cre= ates and destroys TUN interfaces) I ended up in a deadlock - initially freezing = any ifconfig tun<n> destroy, and ultimately panicing the system. Unfortunately, too much stuff had accumulated so no proper core, only this: tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun1: link state changed to UP tun1: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun1: link state changed to UP tun1: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun0: link state changed to DOWN tun0: link state changed to UP tun1: link state changed to UP tun1: link state changed to DOWN nd6_setmtu0: new link MTU on tun1 (1200) is too small for IPv6 tun2: link state changed to UP tun2: link state changed to DOWN panic: deadlres_td_sleep_q: possible deadlock detected for 0xfffff8000505a0= 00 (ifconfig), blocked for 180179 ticks cpuid =3D 6 time =3D 1702994520 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00e6b0a= d20 vpanic() at vpanic+0x132/frame 0xfffffe00e6b0ae50 panic() at panic+0x43/frame 0xfffffe00e6b0aeb0 deadlkres() at deadlkres+0x32a/frame 0xfffffe00e6b0aef0 fork_exit() at fork_exit+0x82/frame 0xfffffe00e6b0af30 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00e6b0af30 --- trap 0, rip =3D 0, rsp =3D 0, rbp =3D 0 --- KDB: enter: panic Uptime: 12h40m22s Dump failed. Partition too small (about 1478MB were needed this time). ---<<BOOT>>--- uname -a FreeBSD freebsd 15.0-CURRENT FreeBSD 15.0-CURRENT #1 snderr_sack-n266985-57ebadb55ba1: Sun Dec 17 17:29:27 CET 2023=20=20=20 This is one local small fix in tcp_output above a9504d76ccdad240b7d5761f4208e252f57042dd. --=20 You are receiving this mail because: You are the assignee for the bug.=
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