Re: Panic in tcp_input

On 19.06.2013 11:10, Ian FREISLICH wrote:
> Hi
>
> I'm seeing this panic quite regularly now.  Most recent sighting on r251858.

This panic message is not very informative and very hard to extract any
meaningful hints.  Do you have a core dump and matching debug kernel?

-- 
Andre

> cpuid = 15
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xffffff846b258130
> vpanic() at vpanic+0x126/frame 0xffffff846b258170
> panic() at panic+0x43/frame 0xffffff846b2581d0
> __rw_assert() at __rw_assert+0x171/frame 0xffffff846b2581e0
> vm_page_busy() at vm_page_busy+0x27/frame 0xffffff846b258200
> vm_fault_hold() at vm_fault_hold+0x2ed/frame 0xffffff846b258450
> vm_fault() at vm_fault+0x77/frame 0xffffff846b258490
> trap_pfault() at trap_pfault+0x1b2/frame 0xffffff846b2584f0
> trap() at trap+0x586/frame 0xffffff846b258650
> calltrap() at calltrap+0x8/frame 0xffffff846b258650
> --- trap 0xc, rip = 0xffffffff8054518e, rsp = 0xffffff846b258710, rbp = 0xffffff846b258810 ---
> tcp_input() at tcp_input+0x12e/frame 0xffffff846b258810
> ip_input() at ip_input+0xca/frame 0xffffff846b258860
> netisr_dispatch_src() at netisr_dispatch_src+0x90/frame 0xffffff846b2588d0
> ether_demux() at ether_demux+0x140/frame 0xffffff846b258900
> ether_nh_input() at ether_nh_input+0x315/frame 0xffffff846b258930
> netisr_dispatch_src() at netisr_dispatch_src+0x90/frame 0xffffff846b2589a0
> ether_demux() at ether_demux+0xb2/frame 0xffffff846b2589d0
> ether_nh_input() at ether_nh_input+0x315/frame 0xffffff846b258a00
> netisr_dispatch_src() at netisr_dispatch_src+0x90/frame 0xffffff846b258a70
> igb_rxeof() at igb_rxeof+0x507/frame 0xffffff846b258ae0
> igb_msix_que() at igb_msix_que+0xf1/frame 0xffffff846b258b30
> intr_event_execute_handlers() at intr_event_execute_handlers+0x90/frame 0xffffff846b258b70
> ithread_loop() at ithread_loop+0x138/frame 0xffffff846b258bb0
> fork_exit() at fork_exit+0x84/frame 0xffffff846b258bf0
> fork_trampoline() at fork_trampoline+0xe/frame 0xffffff846b258bf0
> --- trap 0, rip = 0, rsp = 0xffffff846b258cb0, rbp = 0 ---
> Uptime: 9h1m32s
> Dumping 1847 out of 16368 MB:..1%..11%..21%..31%..41%..51%..61%..71%..81%..91%
>
> #0  doadump (textdump=1) at pcpu.h:236
> 236     pcpu.h: No such file or directory.
>          in pcpu.h
> (kgdb) #0  doadump (textdump=1) at pcpu.h:236
> #1  0xffffffff8044d327 in kern_reboot (howto=260)
>      at /usr/src/sys/kern/kern_shutdown.c:447
> #2  0xffffffff8044d835 in vpanic (fmt=<value optimized out>,
>      ap=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:754
> #3  0xffffffff8044d883 in panic (fmt=<value optimized out>)
>      at /usr/src/sys/kern/kern_shutdown.c:683
> #4  0xffffffff8044b701 in __rw_assert (c=<value optimized out>,
>      what=<value optimized out>, file=<value optimized out>,
>      line=<value optimized out>) at /usr/src/sys/kern/kern_rwlock.c:1147
> #5  0xffffffff805e1507 in vm_page_busy (m=0xfffffe0425a83c08)
>      at /usr/src/sys/vm/vm_page.c:476
> #6  0xffffffff805cfb1d in vm_fault_hold (map=0xfffffe0001000000,
>      vaddr=18446743524069429248, fault_type=7 '\a', fault_flags=0, m_hold=0x0)
>      at /usr/src/sys/vm/vm_fault.c:400
> #7  0xffffffff805cf7e7 in vm_fault (map=0xfffffe0001000000,
>      vaddr=<value optimized out>, fault_type=2 '\002', fault_flags=0)
>      at /usr/src/sys/vm/vm_fault.c:224
> #8  0xffffffff8060cfd2 in trap_pfault (frame=0xffffff846b258660, usermode=0)
>      at /usr/src/sys/amd64/amd64/trap.c:767
> #9  0xffffffff8060c866 in trap (frame=0xffffff846b258660)
>      at /usr/src/sys/amd64/amd64/trap.c:463
> #10 0xffffffff805f58b3 in calltrap ()
>      at /usr/src/sys/amd64/amd64/exception.S:228
> #11 0xffffffff8054518e in tcp_input (m=<value optimized out>, off0=Cannot access memory at address 0x14
> )
>      at counter.h:45
> #12 0xffffffff8053d61a in ip_input (m=0xfffffe0104bf0400)
>      at /usr/src/sys/netinet/ip_input.c:808
> #13 0xffffffff8051cf30 in netisr_dispatch_src (proto=<value optimized out>,
>      source=<value optimized out>, m=0xfffffe0104bf0400)
>      at /usr/src/sys/net/netisr.c:1013
> #14 0xffffffff805123d0 in ether_demux (ifp=<value optimized out>,
>      m=0xfffffe0104bf0400) at /usr/src/sys/net/if_ethersubr.c:849
> #15 0xffffffff805130f5 in ether_nh_input (m=<value optimized out>)
>      at /usr/src/sys/net/if_ethersubr.c:644
> #16 0xffffffff8051cf30 in netisr_dispatch_src (proto=<value optimized out>,
>      source=<value optimized out>, m=0xfffffe0104bf0400)
>      at /usr/src/sys/net/netisr.c:1013
> #17 0xffffffff80512342 in ether_demux (ifp=0xfffffe0035689000,
>      m=0xfffffe0104bf0400) at /usr/src/sys/net/if_ethersubr.c:758
> #18 0xffffffff805130f5 in ether_nh_input (m=<value optimized out>)
>      at /usr/src/sys/net/if_ethersubr.c:644
> #19 0xffffffff8051cf30 in netisr_dispatch_src (proto=<value optimized out>,
>      source=<value optimized out>, m=0xfffffe0104bf0400)
>      at /usr/src/sys/net/netisr.c:1013
> #20 0xffffffff803055a7 in igb_rxeof (count=1499)
>      at /usr/src/sys/dev/e1000/if_igb.c:4723
> #21 0xffffffff80305aa1 in igb_msix_que (arg=0xfffffe002c1ceb38)
>      at /usr/src/sys/dev/e1000/if_igb.c:1590
> #22 0xffffffff80422d90 in intr_event_execute_handlers (
>      p=<value optimized out>, ie=0xfffffe002e008200)
>      at /usr/src/sys/kern/kern_intr.c:1263
> #23 0xffffffff804237f8 in ithread_loop (arg=0xfffffe002e0431a0)
>      at /usr/src/sys/kern/kern_intr.c:1276
> #24 0xffffffff80420814 in fork_exit (
>      callout=0xffffffff804236c0 <ithread_loop>, arg=0xfffffe002e0431a0,
>      frame=0xffffff846b258c00) at /usr/src/sys/kern/kern_fork.c:991
> #25 0xffffffff805f5d7e in fork_trampoline ()
>      at /usr/src/sys/amd64/amd64/exception.S:602
> #26 0x0000000000000000 in ?? ()
> Current language:  auto; currently minimal
> (kgdb)
>