Re: panic "wlock already held" when changing ipv6 default route

25.03.2016, 02:11, "Guy Yur" <guyyur_at_gmail.com>:
> Hi,
>
> When changing the ipv6 default route I get a panic on wlock already held.
> Could be related to r293424 lock changes, haven't checked an older version yet.
Hi,
Yes, there is a problem when the default route next hop is filled in incorrectly, so lookup fails (e.g. matches previous one).
Will be fixed soon.

Thanks for the report.
>
> route add -inet6 default fe80::7
> route change -inet6 default fe80::7
>
> panic: rw_rlock: wlock already held for rib head lock _at_
> /usr/src/sys/net/route.c:445
> cpuid = 0
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0050ee01d0
> vpanic() at vpanic+0x182/frame 0xfffffe0050ee0250
> kassert_panic() at kassert_panic+0x126/frame 0xfffffe0050ee02c0
> __rw_rlock() at __rw_rlock+0xe7/frame 0xfffffe0050ee0360
> rtalloc1_fib() at rtalloc1_fib+0x86/frame 0xfffffe0050ee0420
> ifa_ifwithroute() at ifa_ifwithroute+0x83/frame 0xfffffe0050ee0460
> rt_getifa_fib() at rt_getifa_fib+0xe7/frame 0xfffffe0050ee0480
> rtrequest1_fib() at rtrequest1_fib+0x59c/frame 0xfffffe0050ee0570
> route_output() at route_output+0x653/frame 0xfffffe0050ee07c0
> sosend_generic() at sosend_generic+0x436/frame 0xfffffe0050ee0880
> soo_write() at soo_write+0x42/frame 0xfffffe0050ee08b0
> dofilewrite() at dofilewrite+0x87/frame 0xfffffe0050ee0900
> kern_writev() at kern_writev+0x68/frame 0xfffffe0050ee0950
> sys_write() at sys_write+0x60/frame 0xfffffe0050ee09a0
> amd64_syscall() at amd64_syscall+0x2db/frame 0xfffffe0050ee0ab0
> Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe0050ee0ab0
> --- syscall (4, FreeBSD ELF64, sys_write), rip = 0x800977b7ba, rsp =
> 0x7fffffffe2d8, rbp = 0x7fffffffeb90 ---
> KDB: enter: panic
> [ thread pid 644 tid 100054 ]
> Stopped at kdb_enter+0x3b: movq $0,kdb_why
>
> Booted into livecd with snapshot iso in a VirtualBox VM and ran the
> commands above.
> FreeBSD-11.0-CURRENT-amd64-20160308-r296485-bootonly.iso
>
> -- Guy
> _______________________________________________
> freebsd-current_at_freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org"