[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-07-13 Thread Launchpad Bug Tracker
This bug was fixed in the package haproxy - 1.8.8-1ubuntu0.11

---
haproxy (1.8.8-1ubuntu0.11) bionic; urgency=medium

  * Avoid crashes on idle connections between http requests (LP:
#1884149)

 -- Christian Ehrhardt   Mon, 22 Jun
2020 10:41:43 +0200

** Changed in: haproxy (Ubuntu Bionic)
   Status: Fix Committed => Fix Released

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-07-01 Thread Christian Ehrhardt 
Thaks for the test Simon.
I have marked things verified, if in the 7 day aging period  you find any 
issues speak up here.
Otherwise this can hopefully be released in a while and help everone.

** Tags removed: verification-needed verification-needed-bionic
** Tags added: verification-done verification-done-bionic

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-07-01 Thread Simon Fels
I've just applied the package from
https://launchpad.net/ubuntu/+source/haproxy/1.8.8-1ubuntu0.11 to our
deployment and the crash is fixed. I will keep it running for a while to
see if it remains that way.

Thanks for all the work!

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-07-01 Thread Christian Ehrhardt 
Simon, this is now your time to test once the new version is built in -proposed.
Once you've done that please update the tags here.
Thanks in advance

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-07-01 Thread Robie Basak
This looks good, thanks!

One minor note. The dep3 header says: Origin: upstream,
https://github.com/haproxy/haproxy/commit/d9a130e1962c2a5352f33088c563f4248a102c48;
however that link says "This commit does not belong to any branch on
this repository." so it isn't technically "upstream". However, it also
says "cherry picked from commit ad7f0ad" and
https://github.com/haproxy/haproxy/commit/ad7f0ad1c3c9c541a4c315b24d4500405d1383ee
*is* upstream and clearly is the same change, reported as present in the
upstream master branch since what looks like their v1.9-dev2 tag. So
everything is fine after all. Recording this here in case the d9a130
commit disappears and someone wants to track it down.

** Changed in: haproxy (Ubuntu Bionic)
   Status: Triaged => Fix Committed

** Tags added: verification-needed verification-needed-bionic

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-25 Thread Christian Ehrhardt 
Thanks Simon, and keep the env around - as soon as the SRU Team accepts
this into -proposed we will need the same test again.

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-25 Thread Simon Fels
Thanks Christian! Will give the PPA a go tomorrow.

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-23 Thread Christian Ehrhardt 
Everything complete uploaded to Bionic-unapproved for the SRU Team to
take a look at it.

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-22 Thread Christian Ehrhardt 
** Description changed:

- Version 1.8.8-1ubuntu0.10 of haproxy in Ubuntu 18.04 (bionic) crashes
- with
+ [Impact]
+ 
+  * The handling of locks in haproxy led to a state that between idle http 
+connections one could have indicated a connection was destroyed. In that 
+case the code went on and accessed a just freed resource. As upstream 
+puts it "It can have random implications between requests as
+  it may lead a wrong connection's polling to be re-enabled or disabled
+  for example, especially with threads."
+ 
+  * Backport the fix from upstreams 1.8 stable branch
+ 
+ [Test Case]
+ 
+  * It is a race and might be hard to trigger.
+An haproxy config to be in front of three webservers can be seen below.
+Setting up three apaches locally didn't trigger the same bug, but we 
+know it is timing sensitive.
+ 
+  * Simon (anbox) has a setup which reliably triggers this and will run the 
+tests there.
+ 
+  * The bad case will trigger a crash as reported below.
+ 
+ [Regression Potential]
+ 
+  * This change is in >=Disco and has no further bugs reported against it 
+(no follow on change) which should make it rather safe. Also no other
+change to that file context in 1.8 stable since then.
+The change is on the locking of connections. So if we want to expect 
+regressions, then they would be at the handling of concurrent 
+connections.
+ 
+ [Other Info]
+  
+  * Strictly speaking it is a race, so triggering it depends on load and 
+machine cpu/IO speed.
+ 
+ 
+ ---
+ 
+ 
+ Version 1.8.8-1ubuntu0.10 of haproxy in Ubuntu 18.04 (bionic) crashes with
  
  
  
  Thread 2.1 "haproxy" received signal SIGSEGV, Segmentation fault.
  [Switching to Thread 0xf77b1010 (LWP 17174)]
  __pool_get_first (pool=0xaac6ddd0, pool=0xaac6ddd0) at 
include/common/memory.h:124
  124   include/common/memory.h: No such file or directory.
  (gdb) bt
  #0  __pool_get_first (pool=0xaac6ddd0, pool=0xaac6ddd0) at 
include/common/memory.h:124
  #1  pool_alloc_dirty (pool=0xaac6ddd0) at include/common/memory.h:154
  #2  pool_alloc (pool=0xaac6ddd0) at include/common/memory.h:229
  #3  conn_new () at include/proto/connection.h:655
  #4  cs_new (conn=0x0) at include/proto/connection.h:683
  #5  connect_conn_chk (t=0xaacb8820) at src/checks.c:1553
  #6  process_chk_conn (t=0xaacb8820) at src/checks.c:2135
  #7  process_chk (t=0xaacb8820) at src/checks.c:2281
  #8  0xaabca0b4 in process_runnable_tasks () at src/task.c:231
  #9  0xaab76f44 in run_poll_loop () at src/haproxy.c:2399
  #10 run_thread_poll_loop (data=) at src/haproxy.c:2461
  #11 0xaaad79ec in main (argc=, argv=0xaac61b30) at 
src/haproxy.c:3050
  
  
  
  when running on an ARM64 system. The haproxy.cfg looks like this:
  
  
  
  global
- log /dev/log local0
- log /dev/log local1 notice
- maxconn 4096
- user haproxy
- group haproxy
- spread-checks 0
- tune.ssl.default-dh-param 1024
- ssl-default-bind-ciphers 
ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:!DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:!DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:!CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA
+ log /dev/log local0
+ log /dev/log local1 notice
+ maxconn 4096
+ user haproxy
+ group haproxy
+ spread-checks 0
+ tune.ssl.default-dh-param 1024
+ ssl-default-bind-ciphers 
ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:!DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:!DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:!CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA
  
  defaults
- log global
- mode tcp
- option httplog
- option dontlognull
- retries 3
- timeout queue 2
- timeout client 5
- timeout connect 5000
- 

[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-22 Thread Christian Ehrhardt 
@Simon - I have a PPA for a preliminary test at
https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/4108/+packages

If you can give it a try let me know if it works as expected.

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  haproxy crashes on in __pool_get_first if unique-id-header is used

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-22 Thread Christian Ehrhardt 
Yeah, that one looks better.
The fix is in 1.8.14 and applies as-is to our code in Bionic.

@Simon - would you mind keeping your test system around to test a PPA
now and the SRU later on?

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  haproxy crashes on in __pool_get_first if unique-id-header is used

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-22 Thread Launchpad Bug Tracker
** Merge proposal linked:
   
https://code.launchpad.net/~paelzer/ubuntu/+source/haproxy/+git/haproxy/+merge/386162

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  haproxy crashes on in __pool_get_first if unique-id-header is used

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-22 Thread Christian Ehrhardt 
Thanks Simon,
taking a look at that change then ...

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-21 Thread Bug Watch Updater
** Changed in: haproxy (Debian)
   Status: Unknown => Fix Released

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  haproxy crashes on in __pool_get_first if unique-id-header is used

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-19 Thread Simon Fels
Just ran through the bisect:

git bisect start '--term-new=fixed' '--term-old=unfixed'
# fixed: [ebf033b47d58aa04ae9913038c9369dab8740411] [RELEASE] Released version 
1.8.19
git bisect fixed ebf033b47d58aa04ae9913038c9369dab8740411
# unfixed: [cd117685f0cff4f2f5577ef6a21eaae96ebd9f28] [RELEASE] Released 
version 1.8.8
git bisect unfixed cd117685f0cff4f2f5577ef6a21eaae96ebd9f28
# fixed: [88c166870a779985d50f6a2cf840c844bc9b64da] BUG/MINOR: tools: fix 
set_net_port() / set_host_port() on IPv4
git bisect fixed 88c166870a779985d50f6a2cf840c844bc9b64da
# unfixed: [fdc6c62dbebf4b646b4f80c383e3b00f34b0440f] MINOR: systemd: consider 
exit status 143 as successful
git bisect unfixed fdc6c62dbebf4b646b4f80c383e3b00f34b0440f
# unfixed: [ad84851746243d85f9be59703e9bee0f5c5f8eba] BUG/MEDIUM: threads: fix 
the double CAS implementation for ARMv7
git bisect unfixed ad84851746243d85f9be59703e9bee0f5c5f8eba
# fixed: [d9a130e1962c2a5352f33088c563f4248a102c48] BUG/MEDIUM: mux_pt: 
dereference the connection with care in mux_pt_wake()
git bisect fixed d9a130e1962c2a5352f33088c563f4248a102c48
# unfixed: [a1110e24e5be53ba5fe9ab82372c02a60da06cf9] BUG/MINOR: map: fix 
map_regm with backref
git bisect unfixed a1110e24e5be53ba5fe9ab82372c02a60da06cf9
# unfixed: [3c42f13badd149c9c3152d7b2e653bde5da7c17a] BUG/MEDIUM: cli/threads: 
protect all "proxy" commands against concurrent updates
git bisect unfixed 3c42f13badd149c9c3152d7b2e653bde5da7c17a
# unfixed: [d13cb1516cb5ae4cb8322ed630e1d4e1f584fd77] DOC: Fix spelling error 
in configuration doc
git bisect unfixed d13cb1516cb5ae4cb8322ed630e1d4e1f584fd77
# unfixed: [5b58c92dc9357a87aa3fe94c8121f683feb9c80e] BUG/MINOR: lua: Bad HTTP 
client request duration.
git bisect unfixed 5b58c92dc9357a87aa3fe94c8121f683feb9c80e
# first fixed commit: [d9a130e1962c2a5352f33088c563f4248a102c48] BUG/MEDIUM: 
mux_pt: dereference the connection with care in mux_pt_wake()

Cherry picking the identified commit
(d9a130e1962c2a5352f33088c563f4248a102c48) on top of 1.8.8 makes things
work. I will keep it running for a bit longer and see if it stays
stable.

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-19 Thread Simon Fels
Thanks Christian! I was planing to bisect today as I still have the
environment up and can easily reproduce.

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-19 Thread Christian Ehrhardt 
** Changed in: haproxy (Ubuntu Bionic)
 Assignee: (unassigned) => Christian Ehrhardt  (paelzer)

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-19 Thread Christian Ehrhardt 
The proper fix on the 1.8 branch for the linked issue is  [1]

While checking if that applies to the 1.8.8-1ubuntu0.10 in Bionic it
turned out that we don't even have the code that is fixed. So I'm not
entirely sure the identified Debian/Upstream bugs are really the "same
thing".

The offending commit of that is [2] and only in 1.8.18.

Without [2] there'd be a memory leak which isn't good, but not the crash
that you are seeing.

The list of interesting fixes isn't too long:
$ git log --oneline v1.8.8..v1.8.19 -- src/stream.c
109b76f51 BUG/MAJOR: stream: avoid double free on unique_id
56fd86588 BUG/MEDIUM: stream: Don't forget to free s->unique_id in 
stream_free().
ec70cf52e BUG/MINOR: stream: don't close the front connection when facing a 
backend error
4b57858a4 BUG/MEDIUM: cli: make "show sess" really thread-safe
784260e63 MINOR: stream/cli: report more info about the HTTP messages on "show 
sess all"
6d9b1b723 MINOR: stream/cli: fix the location of the waiting flag in "show sess 
all"
0539df4a0 BUILD: threads: fix minor build warnings when threads are disabled
4bf6d76a2 BUG/MEDIUM: stream: don't crash on out-of-memory
8342ef909 BUG/MEDIUM: session: fix reporting of handshake processing time in 
the logs
9e1754816 BUG/MINOR: stream: use atomic increments for the request counter

Of these the only "this could be it" seems "4bf6d76a2 BUG/MEDIUM:
stream: don't crash on out-of-memory" but you are saying this "occurs
after a first few HTTP requests going through" which doesn't sound like
usual OOM conditions.

What is the indication that we look at src/stream.c? Is it just the
expected fix that was linked - which I disagree? If so we need to look
further.

Upstream usually classifies crashes as major, the full list would be:

109b76f51 BUG/MAJOR: stream: avoid double free on unique_id
7cd8fc9eb BUG/MAJOR: spoe: Don't try to get agent config during SPOP healthcheck
4f256797f BUG/MAJOR: spoe: verify that backends used by SPOE cover all their 
callers' processes
a7f9b5545 BUG/MAJOR: config: verify that targets of track-sc and stick rules 
are present
a64e5574e BUG/MAJOR: cache: fix confusion between zero and uninitialized cache 
key
ca3a8768d BUG/MAJOR: stream-int: Update the stream expiration date in 
stream_int_notify()
69d4ddf91 BUG/MAJOR: http: http_txn_get_path() may deference an inexisting 
buffer
8e5b0923a BUG/MAJOR: kqueue: Don't reset the changes number by accident.
5877e9b88 BUG/MAJOR: thread: lua: Wrong SSL context initialization.
c28c2bfba BUG/MAJOR: stick_table: Complete incomplete SEGV fix
de9d4c677 BUG/MAJOR: Stick-tables crash with segfault when the key is not in 
the stick-table
30b244818 BUG/MAJOR: ssl: OpenSSL context is stored in non-reserved memory slot
ade2721ed BUG/MAJOR: ssl: Random crash with cipherlist capture
2b5ef62fc BUG/MAJOR: map: fix a segfault when using http-request set-map
293225b75 MAJOR: spoe: upgrade the SPOP version to 2.0 and remove the support 
for 1.0
de3b6d5db BUG/MAJOR: lua: Dead lock with sockets
e0f6d4a4e BUG/MAJOR: channel: Fix crash when trying to read from a closed socket

If you look at those does any of them seem to better match your case?

@Simon, if it is so reproducible for you, do you think you'd have a
chance to bisect between 1.8.8 [3] and 1.8.19 [4]?

[1]: 
https://github.com/haproxy/haproxy/commit/109b76f51c282ca51d0b6e6c0c9202e3c50ff1db
[2]: https://github.com/haproxy/haproxy/commit/56fd8658
[3]: 
https://git.haproxy.org/?p=haproxy-1.8.git;a=tag;h=79aa5aa12e55cf0c381a74d2715eaf4a6926e499
[4]: 
https://git.haproxy.org/?p=haproxy-1.8.git;a=tag;h=2cdefda83d22b44a561ad5e66b5417fa10461625

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Title:
  haproxy crashes on in __pool_get_first if unique-id-header is used

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-19 Thread Christian Ehrhardt 
Fixed in 1.8.19-1 and later which means >=Disco

** Also affects: haproxy (Ubuntu Bionic)
   Importance: Undecided
   Status: New

** Changed in: haproxy (Ubuntu Bionic)
   Status: New => Triaged

** Changed in: haproxy (Ubuntu)
   Status: Triaged => Fix Released

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Title:
  haproxy crashes on in __pool_get_first if unique-id-header is used

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[Bug 1884149] Re: haproxy crashes on in __pool_get_first if unique-id-header is used

2020-06-18 Thread Bug Watch Updater
** Changed in: haproxy
   Status: Unknown => Fix Released

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Title:
  haproxy crashes on in __pool_get_first if unique-id-header is used

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