Date: Mon, 12 Aug 2013 15:28:07 -0700 From: Adrian Chadd <adrian@freebsd.org> To: lev@freebsd.org Cc: freebsd-wireless@freebsd.org Subject: Re: ath as AP panics Message-ID: <CAJ-Vmok8UZyHZa_=ZVOvYoKr_9jjsfYJ%2B8x%2BVxUdub-1ezPfHg@mail.gmail.com> In-Reply-To: <809218974.20130813013544@serebryakov.spb.ru> References: <238348209.20130812212328@serebryakov.spb.ru> <CAJ-Vmo=JKZ51N-=NotZm1ba_7AUuEpdUhqP8Ah%2BAHNm-k-bifw@mail.gmail.com> <1391593482.20130812213235@serebryakov.spb.ru> <CAJ-VmokU8EdEnNuvQLXdRN0LjRjcQK%2B8rrupyojpPe2fNk6U1A@mail.gmail.com> <1769815169.20130812214148@serebryakov.spb.ru> <CAJ-VmomtRbX9d_Ejd%2BUOhpbq1c-cR=EHH%2BnU_Cxkw7N__x6V5Q@mail.gmail.com> <809218974.20130813013544@serebryakov.spb.ru>
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Ugh, I missed another m_nextpkt =3D NULL assignment. Try updating again. Thanks! -adrian On 12 August 2013 14:35, Lev Serebryakov <lev@freebsd.org> wrote: > Hello, Adrian. > You wrote 12 =C1=D7=C7=D5=D3=D4=C1 2013 =C7., 21:47:46: > >>> AC> Hm. OK. >>> AC> What I want is the code path _in_ that's queuing a frame via >>> AC> ieee80211_vap_transmit() with m_nextpkt set to NON-NULL. >>> I could set breakpoint on "printf()" from patch and get backtrace whe= n it >>> will be hit. Is it enough? > > AC> yup > > db> trace > Tracing pid 0 tid 100037 td 0xfffffe0001a95920 > ieee80211_vap_transmit() at ieee80211_vap_transmit+0x12b/frame 0xffffff81= 2205e950 > pwrsave_flushq() at pwrsave_flushq+0x19f/frame 0xffffff812205e9a0 > hostap_input() at hostap_input+0x8a9/frame 0xffffff812205ea30 > ath_rx_pkt() at ath_rx_pkt+0x3fa/frame 0xffffff812205eaa0 > ath_rx_proc() at ath_rx_proc+0x290/frame 0xffffff812205eb30 > taskqueue_run_locked() at taskqueue_run_locked+0xe6/frame 0xffffff812205e= b80 > taskqueue_thread_loop() at taskqueue_thread_loop+0xa8/frame 0xffffff81220= 5ebb0 > fork_exit() at fork_exit+0x75/frame 0xffffff812205ebf0 > fork_trampoline() at fork_trampoline+0xe/frame 0xffffff812205ebf0 > --- trap 0, rip =3D 0, rsp =3D 0xffffff812205ecb0, rbp =3D 0 --- > > And here are files/lines in r254250 with "printf() patch"): > > // No surprise here :) > (kgdb) list *(ieee80211_vap_transmit+0x12b) > 0xffffffff8059ad6b is in ieee80211_vap_transmit (/data/src/sys/net80211/i= eee80211_output.c:466). > 461 * Complain if m->m_nextpkt is set. > 462 * > 463 * The caller should've pulled this apart for us. > 464 */ > 465 if (m->m_nextpkt !=3D NULL) { > 466 printf("%s: m_nextpkt not NULL?!\n", __func__); > 467 m->m_nextpkt =3D NULL; > 468 } > 469 > 470 /* > (kgdb) list *(pwrsave_flushq+0x19f) > 0xffffffff8059f63f is in pwrsave_flushq (/data/src/sys/net80211/ieee80211= _power.c:477). > 472 > 473 /* VAP frames, aren't encapsulated */ > 474 if (ifp !=3D NULL) { > 475 while (ifp_q !=3D NULL) { > 476 m =3D ifp_q; > 477 ifp_q =3D m->m_nextpkt; > 478 KASSERT((!(m->m_flags & M_ENCAP)), > 479 ("%s: vapq with M_ENCAP frame!\n", __= func__)); > 480 (void) ieee80211_vap_xmitpkt(vap, m); > 481 } > (kgdb) list *(hostap_input+0x8a9) > 0xffffffff80588219 is in hostap_input (/data/src/sys/net80211/ieee80211_h= ostap.c:655). > 650 /* > 651 * For 4-address packets handle WDS discovery > 652 * notifications. Once a WDS link is setup frame= s > 653 * are just delivered to the WDS vap (see below). > 654 */ > 655 if (dir =3D=3D IEEE80211_FC1_DIR_DSTODS && ni->ni= _wdsvap =3D=3D NULL) { > 656 if (!ieee80211_node_is_authorized(ni)) { > 657 IEEE80211_DISCARD(vap, > 658 IEEE80211_MSG_INPUT | > 659 IEEE80211_MSG_WDS, wh, > (kgdb) list *(ath_rx_proc+0x290) > 0xffffffff80308ec0 is in ath_rx_proc (/data/src/sys/dev/ath/if_ath_rx.c:9= 95). > 990 * Process a single frame. > 991 */ > 992 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_D= MASYNC_POSTREAD); > 993 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); > 994 bf->bf_m =3D NULL; > 995 if (ath_rx_pkt(sc, rs, status, tsf, nf, HAL_RX_QU= EUE_HP, bf, m)) > 996 ngood++; > 997 rx_proc_next: > 998 TAILQ_INSERT_TAIL(&sc->sc_rxbuf, bf, bf_list); > 999 } while (ath_rxbuf_init(sc, bf) =3D=3D 0); > > > -- > // Black Lion AKA Lev Serebryakov <lev@FreeBSD.org> >
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