Date: Thu, 22 Aug 2019 12:01:39 +0000 From: bugzilla-noreply@freebsd.org To: testing@freebsd.org Subject: [Bug 238870] sys.netpfil.pf.names.names and sys.netpfil.pf.synproxy.synproxy cause panic Message-ID: <bug-238870-32464-vSQ34CcUQO@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-238870-32464@https.bugs.freebsd.org/bugzilla/> References: <bug-238870-32464@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D238870 --- Comment #14 from Kristof Provost <kp@freebsd.org> --- (In reply to Hans Petter Selasky from comment #13) Good point, but it's also not trivial to add this, because if_detach_intern= al() does an epoch_wait_preempt() on the net epoch. Simply adding NET_EPOCH_ENTER/EXIT around the loop produces this panic: panic: epoch_wait_preempt() called in the middle of an epoch section of the same epoch cpuid =3D 5 time =3D 1566475161 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0091dc6= 5a0 vpanic() at vpanic+0x19d/frame 0xfffffe0091dc65f0 panic() at panic+0x43/frame 0xfffffe0091dc6650 epoch_wait_preempt() at epoch_wait_preempt+0x29c/frame 0xfffffe0091dc66b0 if_detach_internal() at if_detach_internal+0x1a6/frame 0xfffffe0091dc6730 if_vmove() at if_vmove+0x4b/frame 0xfffffe0091dc6780 vnet_if_return() at vnet_if_return+0x58/frame 0xfffffe0091dc67c0 vnet_destroy() at vnet_destroy+0x124/frame 0xfffffe0091dc67f0 prison_deref() at prison_deref+0x29d/frame 0xfffffe0091dc6830 sys_jail_remove() at sys_jail_remove+0x28f/frame 0xfffffe0091dc6880 amd64_syscall() at amd64_syscall+0x2bb/frame 0xfffffe0091dc69b0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0091dc69b0 --- syscall (508, FreeBSD ELF64, sys_jail_remove), rip =3D 0x80031712a, rsp= =3D 0x7fffffffe848, rbp =3D 0x7fffffffe8d0 --- KDB: enter: panic [ thread pid 1174 tid 100507 ] Stopped at kdb_enter+0x3b: movq $0,kdb_why db> --=20 You are receiving this mail because: You are the assignee for the bug.=
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