Date: Wed, 14 May 2014 14:37:40 +0100 (BST) From: Anton Shterenlikht <mexas@bris.ac.uk> To: FreeBSD-gnats-submit@freebsd.org Subject: kern/189802: amd64 current 264294 panic: breakpoint instruction fault, possibly iwn bug Message-ID: <201405141337.s4EDbehe021105@mech-cluster241.men.bris.ac.uk> Resent-Message-ID: <201405141350.s4EDo0bl076661@freefall.freebsd.org>
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>Number: 189802 >Category: kern >Synopsis: amd64 current 264294 panic: breakpoint instruction fault, possibly iwn bug >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed May 14 13:50:00 UTC 2014 >Closed-Date: >Last-Modified: >Originator: Anton Shterenlikht >Release: FreeBSD 11.0-CURRENT ia64 >Organization: >Environment: System: FreeBSD 11.0-CURRENT #11 r264294: Wed Apr 9 13:38:12 BST 2014 root@mech-aslap33.men.bris.ac.uk:/usr/obj/usr/src/sys/MINKY amd64 >Description: I'm seeing spontaneous reboots on an amd64 laptop with iwn card. I haven't enabled a dump partition yet (will try to do), so all I get is: Fatal trap 3: breakpoint instruction fault while in kernel mode cpuid = 0; apic id = 00 instruction pointer = 0x20:0xffffffff805b173e stack pointer = 0x28:0xffffffff81018590 frame pointer = 0x28:0xffffffff810185b0 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = IOPL = 0 current process = 12 (irq259: iwn0) trap number = 3 panic: breakpoint instruction fault cpuid = 0 KDB: enter: panic iwn behaves really badly, and disconnects every few minutes with: wlan0: Ethernet address: 00:21:5c:50:68:c3 wlan0: link state changed to UP iwn0: iwn_intr: fatal firmware error firmware error log: error type = "FH_ERROR" (0x0000000C) program counter = 0x0000046C source line = 0x000000D0 error data = 0x0000000802730000 branch link = 0x0000A332000004C2 interrupt link = 0x000006DE0000A37E time = 2607530651 driver status: tx ring 0: qid=0 cur=22 queued=12 tx ring 1: qid=1 cur=0 queued=0 tx ring 2: qid=2 cur=0 queued=0 tx ring 3: qid=3 cur=16 queued=0 tx ring 4: qid=4 cur=81 queued=0 tx ring 5: qid=5 cur=0 queued=0 tx ring 6: qid=6 cur=0 queued=0 tx ring 7: qid=7 cur=0 queued=0 tx ring 8: qid=8 cur=0 queued=0 tx ring 9: qid=9 cur=0 queued=0 tx ring 10: qid=10 cur=0 queued=0 tx ring 11: qid=11 cur=0 queued=0 tx ring 12: qid=12 cur=0 queued=0 tx ring 13: qid=13 cur=0 queued=0 tx ring 14: qid=14 cur=0 queued=0 tx ring 15: qid=15 cur=0 queued=0 rx ring: cur=39 ifa_del_loopback_route: deletion failed: 3 wlan0: link state changed to DOWN wlan0: Ethernet address: 00:21:5c:50:68:c3 wlan0: link state changed to UP This is a known problem: http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/176104 It is interesting to note that iwn disconnects a lot at work, and very rarely at home. I suspect that it is too sensitive to interference, or something like this. Anyway, I'll try to provide textdump if I set it up. >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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