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Chernikov To: Bjoern A. Zeeb , FreeBSD Net In-Reply-To: References: Subject: Re: panic: starting DAD on non-tentative address 0xfffff800034a5800, MIME-Version: 1.0 X-Mailer: Yamail [ http://yandex.ru ] 5.0 Date: Wed, 03 Jun 2020 21:15:39 +0100 Message-Id: <354051591215122@mail.yandex.ru> Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=utf-8 X-Rspamd-Queue-Id: 49cgC4047Mz4bLR X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=ipfw.ru header.s=mail header.b=JlnHwrVq; dmarc=none; spf=pass (mx1.freebsd.org: domain of melifaro@ipfw.ru designates 2a02:6b8:0:801:2::111 as permitted sender) smtp.mailfrom=melifaro@ipfw.ru X-Spamd-Result: default: False [-3.54 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.99)[-0.993]; R_DKIM_ALLOW(-0.20)[ipfw.ru:s=mail]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2a02:6b8:0::/52]; NEURAL_HAM_LONG(-1.05)[-1.053]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[ipfw.ru]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[ipfw.ru:+]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-0.90)[-0.898]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:13238, ipnet:2a02:6b8::/32, country:RU]; RCVD_IN_DNSWL_LOW(-0.10)[2a02:6b8:0:801:2::111:from] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Jun 2020 20:15:46 -0000 03.06.2020, 11:46, "Bjoern A. Zeeb" : > Hi, > > got this with HEAD from a few days ago, just in case it rings a bell > with someone. I'm curious what are the conditions. Was it the first "up" for the interface? It looks like we're not locking anything in nd6_dad_timer, so potentially if one configures IPv6 address, waits for most of the dad timer, then do down/up, this can potentially happen. > Otherwise I’ll go investigate when it happens again; I’ll try to > setup netdump to get more information. > > panic: starting DAD on non-tentative address 0xfffff800034a5800 > cpuid = 1 > time = 1500939739 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > 0xfffffe003b65a690 > vpanic() at vpanic+0x182/frame 0xfffffe003b65a6e0 > panic() at panic+0x43/frame 0xfffffe003b65a740 > nd6_dad_start() at nd6_dad_start+0x3bb/frame 0xfffffe003b65a7e0 > in6_if_up() at in6_if_up+0x62/frame 0xfffffe003b65a820 > if_up() at if_up+0x69/frame 0xfffffe003b65a850 > ifhwioctl() at ifhwioctl+0xbf8/frame 0xfffffe003b65a8d0 > ifioctl() at ifioctl+0x3ac/frame 0xfffffe003b65a9a0 > kern_ioctl() at kern_ioctl+0x27b/frame 0xfffffe003b65aa00 > sys_ioctl() at sys_ioctl+0x127/frame 0xfffffe003b65aad0 > amd64_syscall() at amd64_syscall+0x140/frame 0xfffffe003b65abf0 > fast_syscall_common() at fast_syscall_common+0x101/frame > 0xfffffe003b65abf0 > --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x80047cd8a, rsp = > 0x7fffffffe258, rbp = 0x7fffffffe2b0 --- > KDB: enter: panic > [ thread pid 12247 tid 100088 ] > Stopped at kdb_enter+0x37: movq $0,0x10c9ad6(%rip) > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"