Date: Mon, 22 Dec 2014 19:03:37 -0800 From: Rui Paulo <rpaulo@me.com> To: FreeBSD Net <freebsd-net@freebsd.org> Subject: LOR in IGMP code Message-ID: <B4F50B42-F837-471C-A963-2F515DDE3192@me.com>
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Hi, I may look into this, but here it is. HEAD as of this week. lock order reversal: 1st 0xc2be2508 if_addr_lock (if_addr_lock) @ = /home/rpaulo/freebsd/sys/netinet/igmp.c:1716 2nd 0xc070d9bc ifnet_rw (ifnet_rw) @ = /home/rpaulo/freebsd/sys/net/if.c:243 KDB: stack backtrace: db_trace_self() at db_trace_self pc =3D 0xc0551534 lr =3D 0xc0233b58 = (db_trace_self_wrapper+0x30) sp =3D 0xdcfc5a18 fp =3D 0xdcfc5b30 r10 =3D 0xc070d9bc db_trace_self_wrapper() at db_trace_self_wrapper+0x30 pc =3D 0xc0233b58 lr =3D 0xc03a2f34 (kdb_backtrace+0x38) sp =3D 0xdcfc5b38 fp =3D 0xdcfc5b40 r4 =3D 0xc06a7a24 r5 =3D 0xc05a52a1 r6 =3D 0xc05c7a76 r7 =3D 0xc06da464 kdb_backtrace() at kdb_backtrace+0x38 pc =3D 0xc03a2f34 lr =3D 0xc03bd7e0 (witness_checkorder+0xe50) sp =3D 0xdcfc5b48 fp =3D 0xdcfc5b98 r4 =3D 0xc05c8031 witness_checkorder() at witness_checkorder+0xe50 pc =3D 0xc03bd7e0 lr =3D 0xc0369114 (__rw_rlock+0x94) sp =3D 0xdcfc5ba0 fp =3D 0xdcfc5bd0 r4 =3D 0x000000f3 r5 =3D 0xc05c7a73 r6 =3D 0xc070d9cc r7 =3D 0xc070d9bc r8 =3D 0xc2be2400 r9 =3D 0xc0705bfc r10 =3D 0x0000001c __rw_rlock() at __rw_rlock+0x94 pc =3D 0xc0369114 lr =3D 0xc042d2f0 (ifnet_byindex+0x28) sp =3D 0xdcfc5bd8 fp =3D 0xdcfc5be8 r4 =3D 0xc070d9cc r5 =3D 0x00000003 r6 =3D 0x00000000 r7 =3D 0xc0705bc0 r8 =3D 0xc2be2400 r9 =3D 0xc0705bfc r10 =3D 0x0000001c ifnet_byindex() at ifnet_byindex+0x28 pc =3D 0xc042d2f0 lr =3D 0xc0448bac (igmp_intr+0x18) sp =3D 0xdcfc5bf0 fp =3D 0xdcfc5c40 r4 =3D 0xc2bbfa00 r5 =3D 0xc2bbfa00 r6 =3D 0x00000000 igmp_intr() at igmp_intr+0x18 pc =3D 0xc0448bac lr =3D 0xc043a3a4 (netisr_dispatch_src+0xa8) sp =3D 0xdcfc5c48 fp =3D 0xdcfc5c70 r4 =3D 0x00000002 r5 =3D 0xc2bbfa00 r6 =3D 0x00000000 r7 =3D 0xc0705bc0 r8 =3D 0xc2be2400 r9 =3D 0xc0705bfc r10 =3D 0x0000001c netisr_dispatch_src() at netisr_dispatch_src+0xa8 pc =3D 0xc043a3a4 lr =3D 0xc043a734 (netisr_dispatch+0x14) sp =3D 0xdcfc5c78 fp =3D 0xdcfc5c78 r4 =3D 0xc2c27500 r5 =3D 0xc2bbfa00 r6 =3D 0x00000000 r7 =3D 0x00000000 r8 =3D 0xc2be2400 r9 =3D 0x00000016 r10 =3D 0x0000001c netisr_dispatch() at netisr_dispatch+0x14 pc =3D 0xc043a734 lr =3D 0xc04492cc = (igmp_v1v2_queue_report+0x1d8) sp =3D 0xdcfc5c80 fp =3D 0xdcfc5ca8 igmp_v1v2_queue_report() at igmp_v1v2_queue_report+0x1d8 pc =3D 0xc04492cc lr =3D 0xc0447df0 (igmp_fasttimo+0x3c4) sp =3D 0xdcfc5cb0 fp =3D 0xdcfc5d38 r4 =3D 0x00000002 r5 =3D 0xc2c25c00 r6 =3D 0xc05ca12c r7 =3D 0xc2acff60 r8 =3D 0x00000000 r9 =3D 0xc2c27500 r10 =3D 0xc070db70 igmp_fasttimo() at igmp_fasttimo+0x3c4 pc =3D 0xc0447df0 lr =3D 0xc03da754 (pffasttimo+0x4c) sp =3D 0xdcfc5d40 fp =3D 0xdcfc5d60 r4 =3D 0xc0677e40 r5 =3D 0xc0677fb0 r6 =3D 0xc070d648 r7 =3D 0xc070d610 r8 =3D 0xc070d644 r9 =3D 0x00000096 r10 =3D 0xc070d600 pffasttimo() at pffasttimo+0x4c pc =3D 0xc03da754 lr =3D 0xc03815a8 (softclock_call_cc+0x138) sp =3D 0xdcfc5d68 fp =3D 0xdcfc5dc0 r4 =3D 0x00000000 r5 =3D 0xc07046f8 softclock_call_cc() at softclock_call_cc+0x138 pc =3D 0xc03815a8 lr =3D 0xc0381708 (softclock+0x40) sp =3D 0xdcfc5dc8 fp =3D 0xdcfc5dd0 r4 =3D 0xc070d610 r5 =3D 0xc070d600 r6 =3D 0xc2516600 r7 =3D 0xc05af8e1 r8 =3D 0x000004be r9 =3D 0xc251662c r10 =3D 0x00000000 softclock() at softclock+0x40 pc =3D 0xc0381708 lr =3D 0xc033b9dc = (intr_event_execute_handlers+0xb8) sp =3D 0xdcfc5dd8 fp =3D 0xdcfc5df8 r4 =3D 0xc2859700 r5 =3D 0xc2859748 intr_event_execute_handlers() at intr_event_execute_handlers+0xb8 pc =3D 0xc033b9dc lr =3D 0xc033c32c (ithread_loop+0xa8) sp =3D 0xdcfc5e00 fp =3D 0xdcfc5e38 r4 =3D 0xc2505ec0 r5 =3D 0xc297dcc0 r6 =3D 0xc2859700 r7 =3D 0xc0669900 r8 =3D 0xc070d3e4 r9 =3D 0x00000000 r10 =3D 0xc05af8e1 ithread_loop() at ithread_loop+0xa8 pc =3D 0xc033c32c lr =3D 0xc033931c (fork_exit+0x80) sp =3D 0xdcfc5e40 fp =3D 0xdcfc5e58 r4 =3D 0xc297dcc0 r5 =3D 0xc297a6f0 r6 =3D 0xc033c284 r7 =3D 0xc2505ec0 r8 =3D 0xdcfc5e60 r9 =3D 0x00000000 r10 =3D 0x00000000 fork_exit() at fork_exit+0x80 pc =3D 0xc033931c lr =3D 0xc0553284 (swi_exit) sp =3D 0xdcfc5e60 fp =3D 0x00000000 r4 =3D 0xc033c284 r5 =3D 0xc2505ec0 r6 =3D 0x00000000 r7 =3D 0x00000000 r8 =3D 0x00000000 swi_exit() at swi_exit pc =3D 0xc0553284 lr =3D 0xc0553284 (swi_exit) sp =3D 0xdcfc5e60 fp =3D 0x00000000 -- Rui Paulo
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