Date: Fri, 20 Aug 2004 02:39:15 +0200 From: Andre Oppermann <andre@freebsd.org> To: Nate Lawson <nate@root.org> Cc: current@freebsd.org Subject: Re: panic on kldunload ipfw.ko Message-ID: <41254833.B531B868@freebsd.org> References: <41251502.2020607@root.org>
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Nate Lawson wrote: > > Easy to reproduce -- boot single user. kldload ipfw.ko; kldunload > ipfw.ko. Next timeout, you get the following panic: The bug is fixed in 'netinet/ip_fw_pfil.c' rev 1.5 a few minutes ago. -- Andre > panic: write, page not present > callout_reset() + 0x12c > tcp_isn_tick() + 0x3f > softclock > ithread_loop > > (gdb) l *callout_reset+0x12c > 0xc05011e8 is in callout_reset (../../../kern/kern_timeout.c:437). > 432 > 433 c->c_arg = arg; > 434 c->c_flags |= (CALLOUT_ACTIVE | CALLOUT_PENDING); > 435 c->c_func = ftn; > 436 c->c_time = ticks + to_ticks; > 437 TAILQ_INSERT_TAIL(&callwheel[c->c_time & callwheelmask], > 438 c, c_links.tqe); > 439 mtx_unlock_spin(&callout_lock); > 440 } > 441 > > (gdb) l *tcp_isn_tick+0x3f > 0xc0588c4f is in tcp_isn_tick (../../../netinet/tcp_subr.c:1368). > 1363 if (projected_offset > isn_offset) > 1364 isn_offset = projected_offset; > 1365 > 1366 isn_offset_old = isn_offset; > 1367 callout_reset(&isn_callout, 1, tcp_isn_tick, NULL); > 1368 } > 1369 > 1370 /* > 1371 * When a source quench is received, close congestion window > 1372 * to one segment. We will gradually open it again as we proceed. > > -Nate
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