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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