#asciilifeform | 2020-02-25

205.134.172.4:8333 : Alive: (0.132s) V=70001 (/therealbitcoin.org:0.7.0.1/) Jumpers=0x1 (TRB-Compat.) Blocks=618884

00:14

205.134.172.6:8333 : Alive: (0.142s) V=50400 (/"therealbitcoin":0.5.4/) Jumpers=0x1 (TRB-Compat.) Blocks=618884

00:15

108.31.170.3:8333 : Alive: (0.357s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618884 (Operator: asciilifeform)

00:15

188.121.168.69:8333 : Alive: (0.261s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618884

00:15

103.36.92.112:8333 : Busy? (No answer in 15 sec.)

00:15

!w probe 103.36.92.112

00:16

103.36.92.112:8333 : Alive: (0.971s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618884

~ 1 hours 27 minutes ~

01:43

http://bvt-trace.net/2020/02/a-tiny-and-incomplete-trb-wedgetrace/ << bvt's backtrace -- A tiny and incomplete TRB wedgetrace

~ 7 hours 11 minutes ~

08:54

!w poll

08:54

Polling 6 nodes...

08:54

205.134.172.6:8333 : Alive: (0.082s) V=50400 (/"therealbitcoin":0.5.4/) Jumpers=0x1 (TRB-Compat.) Blocks=618944

08:54

205.134.172.27:8333 : Alive: (0.084s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618944 (Operator: asciilifeform)

08:54

108.31.170.3:8333 : Alive: (0.099s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618944 (Operator: asciilifeform)

08:54

103.36.92.112:8333 : Alive: (0.527s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618944

08:54

188.121.168.69:8333 : Alive: (0.180s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618944

08:54

205.134.172.4:8333 : Busy? (No answer in 15 sec.)

~ 1 hours 11 minutes ~

10:06

!w poll

10:06

Polling 6 nodes...

10:06

205.134.172.27:8333 : Alive: (0.025s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618947 (Operator: asciilifeform)

10:06

205.134.172.6:8333 : Alive: (0.082s) V=50400 (/"therealbitcoin":0.5.4/) Jumpers=0x1 (TRB-Compat.) Blocks=618947

10:06

108.31.170.3:8333 : Alive: (0.188s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618947 (Operator: asciilifeform)

10:06

103.36.92.112:8333 : Alive: (0.527s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618947

10:06

188.121.168.69:8333 : Alive: (0.334s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618947

10:06

205.134.172.4:8333 : Busy? (No answer in 15 sec.)

~ 23 minutes ~

10:29

!w probe 205.134.172.4

10:29

205.134.172.4:8333 : Busy? (No answer in 15 sec.)

10:29

sumbody's wedged...

~ 1 hours 16 minutes ~

11:46

BingoBoingo

asciilifeform: ty, looking at top before restarting the explosion in RAM usage suggests it may be the phenomenon bvt documented

11:52

BingoBoingo: i'm going through his piece atm actually. dollars to doughnuts, it's underflow in unsigned int nSize = vSend.size() - nMessageStart; but atm can't prove it

11:54

the proggy i'm aboutta genesis might prove useful in replicating this effect (it so happens to contain working routines for injecting arbitrary liquishit into a noad)

11:55

BingoBoingo: i take it .4 is yours btw ? wouldja like it labeled ? ( so can see yer name highlighted when probed )

11:56

*

asciilifeform has of course list of who in cage is who, but did promise not to advertise folx w/out their req

11:56

BingoBoingo

Maybe later

11:56

aite

11:57

mmmm doughnuts.

11:57

shinohai: 4GB shitdoughnut, lol

11:58

will be interesting if it turns out that that 4GB is actually entire memory space of process and gets sent out to issuer of 'magic cmd'

~ 1 hours 11 minutes ~

13:10

http://www.loper-os.org/?p=3665 << Loper OS -- "Watchglass" Genesis.

13:20

!w poll

13:20

Polling 6 nodes...

13:20

205.134.172.6:8333 : Alive: (0.022s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618965

13:20

205.134.172.27:8333 : Alive: (0.144s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618965 (Operator: asciilifeform)

13:20

108.31.170.3:8333 : Alive: (0.097s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618965 (Operator: asciilifeform)

13:20

103.36.92.112:8333 : Alive: (0.527s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618965

13:20

188.121.168.69:8333 : Alive: (0.458s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=618965

13:20

205.134.172.4:8333 : Busy? (No answer in 15 sec.)

13:32

*

asciilifeform reground the vpatch to put proggy in named dir, as is trad.

~ 32 minutes ~

14:05

asciilifeform: nah, nSize looks correct, and pend in

14:06

sorry, fatfingered. actually, nSize would look ok after such overflow, so it may just be masking the problem

14:09

bvt: as i understand, for this effect, either a) vSend.size() b) nMessageStart c) vSend.begin() d) vSend.end() wildly outta bounds, or d) memory corruption boojum somewhere entirely else

14:09

*e)

14:13

these 4Gb of memory look like a realloc result to me, caused by an underflow somewhere in serialization code

14:14

bvt: if can find just where, i can write a liquishit sender so to reproduce.

14:20

bvt: for completeness -- could also be locking bugola: there's a number of places where e.g. nMessageStart = -1

14:22

another datapoint is that it happens when a node requests a ton of blocks, apparently could be an under/overflow if vSend.size() becomes bigger than fits in uint32?

14:24

that's what suggested 'race cond.' to me -- that it happens , apparently , strictly under max cpu load

14:27

astonishingly gnarly shitcoad, incidentally. and nobody's touched the 'message' crapola since genesis .

14:27

hm; i could wrap operator<< of vSend to check how the size() changed - if by more than 4Gb (3Gb for some slack?), we have a culprit?

14:28

bvt: of course can 'kludge' , but won't know whether nailed it until effect can be reproduced

14:29

bvt: i dun suppose you have a core dump of wedged state ?

14:30

i have it in debugger in wedged state right now, so i'd like to get a maximum value out of it before killing.

14:31

at the very least, make dump if you can

14:32

bvt: can get values of the stack vars of EndMessage at the time Hash invoked ?

14:32

ok, have 5.4Gb core.pid

14:33

info locals?

14:33

plz

14:35

bvt: i'ma set up a place you can put this turd, gimme coupla min

14:36

nothing interesting http://bvt-trace.net/2020/02/a-tiny-and-incomplete-trb-wedgetrace/#comment-135 (I'll use comments because pastes tend to disappear)

~ 19 minutes ~

14:55

bvt: http://paste.deedbot.org/?id=Me42

14:58

bvt: lemme know plox if this worx.

15:11

should finish uploading the dump in ~15min

15:11

ty bvt !

15:11

dun fughet the orig bin too plz

15:12

bvt: i'ma gzip & put it in pub in case others want to look

15:26

i'm not sure this is a good idea, given that i'm not sure what amount of information about the host may end up in the dump.

15:26

bvt: your call

15:27

bvt: whatever's in there, fwiw, already came outta yer box , i strongly suspect, when it went an' tried sending out that 4gb

15:28

at the very least, oughta give mod6 a copy (not sure whether he knows how to gdb tho?)

15:28

should be it

15:29

ty bvt

15:29

imho would be valuable to put it up publicly. if you have nuffin seekrit on that box aside from pw's, i rec to change'em, then can put up ?

~ 26 minutes ~

15:56

bvt: ?

15:57

if BingoBoingo acks, i'll make it available via my blog, you can share the data as well

15:57

ok i'ma mirror on my box then

15:57

(plenty of bw to spare)

15:57

will be up in half hr or so

15:58

just nao finished gzippin'

16:00

*

asciilifeform forgot that bvt were living in BingoBoingo's box

16:03

bvt: moving it b/w machines atm, <15m left

~ 20 minutes ~

16:23

bvt: http://nosuchlabs.com/pub/bvt-trb-wedge.tar.gz

16:23

sha512==bebfd877d7bc1e8790d6dba1a0d41b0fa591884bd07c3b08ed55b1ae87f470a707c168bafe7c070e38a9a85c762a02b3361c07eb56bc981ecffa86940ef9aa16

16:28

( of 'core.2266' : ae3eeac1e13f01a5c4f9979498ff367e4571f89e32ec1ac4d78d59428bf48fc13d750e93c83ddb92796178759b54e919c4e7f6a336364fe8fe3213b11f1c2b07 ;

16:29

of 'bitcoind-wedge2' : 793e8fe8d37620b6f9b6cb14e9e40e04cb45f1e9bce3ff3785a3ed427c455f1442bd35b17e1fd6746a6e321154ea5c81ab439e545dcd32a91cfcad52bb38bb02 . )

16:33

http://blog.mod6.net/2020/02/multiple-vpatches-tested-and-signed/ << mod6's Blog -- Multiple Vpatches Tested And Signed

16:43

bvt: i put the mirror link in your comments (atm in spam queue) .

~ 51 minutes ~

17:35

lol was trying mod6's new patchset for trb in above blogpost, phexdigit fix causes it to fail on esthlos-v: http://btc.info.gf/paste/9a33aa@raw

~ 25 minutes ~

18:00

http://qntra.net/2020/02/man-arrested-after-failing-to-destroy-motor-vehicle-in-pentagon-parking-lot/ << Qntra -- Man Arrested After Failing To Destroy Motor Vehicle In Pentagon Parking Lot

~ 24 minutes ~

18:25

^ above mystery solved, mod6 wrote in just as I was tracing problem and evidently I was missing some previous patches.

18:25

I only have up to 'aggressive_pushgetblocks' in current patchset, will sign a mirror to www as soon as all tests pass.

~ 23 minutes ~

18:49

http://fixpoint.welshcomputing.com/2020/bitcoin-transactions-and-their-signing-1/ << Fixpoint -- Bitcoin transactions and their signing, 1

18:54

BingoBoingo: possible lulzy Qntra story, I simply don't have time to write up this evening: https://archive.is/aLNq0

18:54

Run moar SehShit

18:54

*SegShit

18:55

BingoBoingo

tyvm

18:56

bvt et al : http://bvt-trace.net/2020/02/a-tiny-and-incomplete-trb-wedgetrace/#comment-137

19:09

... continued .

~ 43 minutes ~

19:53

interesting new tool release asciilifeform

19:54

Vexual: by all rights farthest thing from 'interesting'. but potentially useful imho.

20:02

potentially useful is inherently interesting

20:04

Vexual: what i meant was, there's nuffin nontrivial in there. ( ate 1 afternoon. ) ircism lifted from ye olde logotron bot, plus bit of logic to ask 'version' packet from noades & report answr.

20:06

I assumed you already had it; and irc bit was new

20:06

Vexual: had irc bit (since august), the rest new

20:07

Well then I was almost precisely wrong

20:08

imho ideally it'd probe in background (say, erry 20min) and report strictly wedged and 'behind' nodez

20:08

but would rather atm have the manually-cranked tester than nuffin

20:15

orig. started w/ aim to make injector for replaying mod6's packet capture into a node. there, ended up stuck, but realized can quickly make general-purpose node poll proggy from the pieces, for the time being.

20:18

does a testchain fit anywhere in hour head?

20:18

it's possibly illegal by now

20:19

Vexual: other than for playing w/ mining logic, wat good does 'test chain' do ?

20:19

mining is how I got there; I've been pondering your 0 fee double spend question for days

20:20

Vexual: you can make 'test chain' any time you like, just by setting up coupla nodes on a closed lan & plugging'em into ea. other

20:21

yeah, I aslo kinda assumed it might be useful for repeating wedge conditions

20:21

you'll have a hell of a time making the sort of block fillage & mempool volume seen in 'nature' tho

20:21

so doubtful re wedge conditions

20:22

copy nature

20:22

( this is even supposing 'wedge packet' is 'natural', i.e. accidental, rather than crafted, object )

20:23

good luck testing on mainchain

20:23

test yes, repeat no

20:23

Vexual: re 'doublespends' -- pocket test network of trb won't tell you much re the current miners, who quite evidently use very diff. logic than seen in trb's (which has ~0 optimization for tx selection)

20:27

I agree

20:28

re wedge -- given that apparently 0 prb nodes suffered the wedge, i'm inclined to think that this is the answer. even tho atm cannot readily say how to replicate condition.

20:30

tomorrow will take deeper look at bvt's dump, possibly derive the necessary input to replicate effect. (supposing no one does 1st while i sleep)

20:33

!w poll

20:33

Polling 0 nodes...

20:33

hrm 1s i think i moved config, lol

20:37

!w poll

20:37

Polling 6 nodes...

20:37

205.134.172.27:8333 : Alive: (0.084s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=619004 (Operator: asciilifeform)

20:37

205.134.172.4:8333 : Alive: (0.083s) V=70001 (/therealbitcoin.org:0.7.0.1/) Jumpers=0x1 (TRB-Compat.) Blocks=619004

20:37

205.134.172.6:8333 : Alive: (0.082s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=619004

20:37

108.31.170.3:8333 : Alive: (0.104s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=619004 (Operator: asciilifeform)

20:37

103.36.92.112:8333 : Alive: (0.589s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=619004

20:38

ssalghctaw pals\

20:38

188.121.168.69:8333 : Busy? (No answer in 20 sec.)

20:39

!w src

20:39

asciilifeform: my source code can be seen at: http://www.loper-os.org/?p=3665

20:39

there.

20:39

oughta be ok to leave alone nao.

20:39

:)

20:46

Vexual: have you a node ? it is a little odd that yer interested in subj, but no noad ?

20:47

nope, my strange node sits on a platter collecting dust

20:48

prolly get hot'n'loud if I dusted it off

20:48

my e.g. 'apu1', w/ 0 moving parts , makes an entirely workable noad.

20:49

is approx the size of 2 vhs cassettes laid long sides together

20:50

draws <10w

20:51

that's what lives at .27

20:52

with halvening and covid19, I might just need to spin something upi

20:53

to paraphrase the old song, 'i roll 2 nodes in 2 times of peace, and 2 in times of war, i roll 2 nodes before i roll 2 nodes, and then i roll 2 moar'

20:53

or how it went.

20:53

not sure if soviet or jamaican

20:54

was engl. so prolly the latter

20:57

!w poll

20:57

Polling 6 nodes...

20:57

205.134.172.6:8333 : Alive: (0.082s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=619005

20:57

205.134.172.4:8333 : Alive: (0.083s) V=70001 (/therealbitcoin.org:0.7.0.1/) Jumpers=0x1 (TRB-Compat.) Blocks=619005

20:57

205.134.172.27:8333 : Alive: (0.084s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=619005 (Operator: asciilifeform)

20:57

108.31.170.3:8333 : Alive: (0.160s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=619005 (Operator: asciilifeform)

20:57

103.36.92.112:8333 : Alive: (0.467s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=619005

20:57

188.121.168.69:8333 : Alive: (0.343s) V=99999 (/therealbitcoin.org:0.9.99.99/) Jumpers=0x1 (TRB-Compat.) Blocks=619005

20:58