[xen-4.14-testing bisection] complete test-xtf-amd64-amd64-2

[osstest service owner <osstest-admin@xxxxxxxxxxxxxx>]

branch xen-4.14-testing
xenbranch xen-4.14-testing
job test-xtf-amd64-amd64-2
testid xtf/test-pv64-xsa-221

Tree: linux git://xenbits.xen.org/linux-pvops.git
Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git
Tree: ovmf git://xenbits.xen.org/osstest/ovmf.git
Tree: qemu git://xenbits.xen.org/qemu-xen-traditional.git
Tree: qemuu git://xenbits.xen.org/qemu-xen.git
Tree: seabios git://xenbits.xen.org/osstest/seabios.git
Tree: xen git://xenbits.xen.org/xen.git
Tree: xtf git://xenbits.xen.org/xtf.git

*** Found and reproduced problem changeset ***

  Bug is in tree:  xen git://xenbits.xen.org/xen.git
  Bug introduced:  b8c2efbe7b3e8fa5f0b0a3679afccd1204949070
  Bug not present: f5469067ee0260673ca1e554ff8888512a55ccfc
  Last fail repro: http://logs.test-lab.xenproject.org/osstest/logs/154886/


  commit b8c2efbe7b3e8fa5f0b0a3679afccd1204949070
  Author: Jan Beulich <jbeulich@xxxxxxxx>
  Date:   Tue Sep 22 16:13:34 2020 +0200
  
      evtchn/x86: enforce correct upper limit for 32-bit guests
      
      The recording of d->max_evtchns in evtchn_2l_init(), in particular with
      the limited set of callers of the function, is insufficient. Neither for
      PV nor for HVM guests the bitness is known at domain_create() time, yet
      the upper bound in 2-level mode depends upon guest bitness. Recording
      too high a limit "allows" x86 32-bit domains to open not properly usable
      event channels, management of which (inside Xen) would then result in
      corruption of the shared info and vCPU info structures.
      
      Keep the upper limit dynamic for the 2-level case, introducing a helper
      function to retrieve the effective limit. This helper is now supposed to
      be private to the event channel code. The used in do_poll() and
      domain_dump_evtchn_info() weren't consistent with port uses elsewhere
      and hence get switched to port_is_valid().
      
      Furthermore FIFO mode's setup_ports() gets adjusted to loop only up to
      the prior ABI limit, rather than all the way up to the new one.
      
      Finally a word on the change to do_poll(): Accessing ->max_evtchns
      without holding a suitable lock was never safe, as it as well as
      ->evtchn_port_ops may change behind do_poll()'s back. Using
      port_is_valid() instead widens some the window for potential abuse,
      until we've dealt with the race altogether (see XSA-343).
      
      This is XSA-342.
      
      Reported-by: Julien Grall <jgrall@xxxxxxxxxx>
      Fixes: 48974e6ce52e ("evtchn: use a per-domain variable for the max 
number of event channels")
      Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
      Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
      Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>


For bisection revision-tuple graph see:
   
http://logs.test-lab.xenproject.org/osstest/results/bisect/xen-4.14-testing/test-xtf-amd64-amd64-2.xtf--test-pv64-xsa-221.html
Revision IDs in each graph node refer, respectively, to the Trees above.

----------------------------------------
Running cs-bisection-step 
--graph-out=/home/logs/results/bisect/xen-4.14-testing/test-xtf-amd64-amd64-2.xtf--test-pv64-xsa-221
 --summary-out=tmp/154888.bisection-summary --basis-template=154350 
--blessings=real,real-bisect --flight=154888 xen-4.14-testing 
test-xtf-amd64-amd64-2 xtf/test-pv64-xsa-221
Searching for failure / basis pass:
 154641 fail [host=chardonnay0] / 154350 [host=albana1] 154148 [host=godello0] 
154116 [host=huxelrebe0] 152545 [host=huxelrebe0] 152537 [host=fiano1] 152531 
[host=albana0] 152153 [host=albana1] 152124 [host=huxelrebe1] 152081 
[host=fiano1] 152061 [host=godello0] 152043 [host=godello1] 151922 
[host=elbling0] 151899 [host=fiano0] 151892 ok.
Failure / basis pass flights: 154641 / 151892
(tree with no url: minios)
Tree: linux git://xenbits.xen.org/linux-pvops.git
Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git
Tree: ovmf git://xenbits.xen.org/osstest/ovmf.git
Tree: qemu git://xenbits.xen.org/qemu-xen-traditional.git
Tree: qemuu git://xenbits.xen.org/qemu-xen.git
Tree: seabios git://xenbits.xen.org/osstest/seabios.git
Tree: xen git://xenbits.xen.org/xen.git
Tree: xtf git://xenbits.xen.org/xtf.git
Latest c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
f37a1cf023b277d0d49323bf322ce3ff0c92262d 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
Basis pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
d9a4084544134eea50f62e88d79c466ae91f0455 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
88ab0c15525ced2eefe39220742efe4769089ad8 
02d69864b51a4302a148c28d6d391238a6778b4b 
f645a19115e666ce6401ca63b7d7388571463b55
Generating revisions with ./adhoc-revtuple-generator  
git://xenbits.xen.org/linux-pvops.git#c3038e718a19fc596f7b1baba0f83d5146dc7784-c3038e718a19fc596f7b1baba0f83d5146dc7784
 
git://xenbits.xen.org/osstest/linux-firmware.git#c530a75c1e6a472b0eb9558310b518f0dfcd8860-c530a75c1e6a472b0eb9558310b518f0dfcd8860
 
git://xenbits.xen.org/osstest/ovmf.git#d9a4084544134eea50f62e88d79c466ae91f0455-fb97626fe04747ec89599dce0992def9a36e2f6b
 git://xenbits.xen.org/qemu-xen-traditional.git#3c659044118e34603161457db99\
 34a34f816d78b-3c659044118e34603161457db9934a34f816d78b 
git://xenbits.xen.org/qemu-xen.git#ea6d3cd1ed79d824e605a70c3626bc437c386260-ea6d3cd1ed79d824e605a70c3626bc437c386260
 
git://xenbits.xen.org/osstest/seabios.git#88ab0c15525ced2eefe39220742efe4769089ad8-155821a1990b6de78dde5f98fa5ab90e802021e0
 
git://xenbits.xen.org/xen.git#02d69864b51a4302a148c28d6d391238a6778b4b-f37a1cf023b277d0d49323bf322ce3ff0c92262d
 
git://xenbits.xen.org/xtf.git#f645a19115e666ce6401ca63b7d7388571463b55-17d372b763cb0b2e2e6b5\
 a637c11f3997d2533fa
Loaded 10498 nodes in revision graph
Searching for test results:
 151892 pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
d9a4084544134eea50f62e88d79c466ae91f0455 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
88ab0c15525ced2eefe39220742efe4769089ad8 
02d69864b51a4302a148c28d6d391238a6778b4b 
f645a19115e666ce6401ca63b7d7388571463b55
 151899 [host=fiano0]
 151922 [host=elbling0]
 152061 [host=godello0]
 152043 [host=godello1]
 152081 [host=fiano1]
 152124 [host=huxelrebe1]
 152153 [host=albana1]
 152531 [host=albana0]
 152537 [host=fiano1]
 152545 [host=huxelrebe0]
 154116 [host=huxelrebe0]
 154148 [host=godello0]
 154350 [host=albana1]
 154617 [host=chardonnay1]
 154641 fail c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
f37a1cf023b277d0d49323bf322ce3ff0c92262d 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154777 pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
d9a4084544134eea50f62e88d79c466ae91f0455 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
88ab0c15525ced2eefe39220742efe4769089ad8 
02d69864b51a4302a148c28d6d391238a6778b4b 
f645a19115e666ce6401ca63b7d7388571463b55
 154815 fail c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
f37a1cf023b277d0d49323bf322ce3ff0c92262d 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154821 pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
9f2d50f145191733e502667327c2129034a93099 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
c3a0fc22af90ef28e68b116c6a49d9cec57f71cf 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154831 pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
a048af3c9073e4b8108e6cf920bbb35574059639 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
c3a0fc22af90ef28e68b116c6a49d9cec57f71cf 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154841 pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
1b461403ee723dab01d5828714cca0b9396a6b3c 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
483b43c4573329a28f1c9e18f90694e5be35ddb9 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154846 pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
440121b54280ef1d7196bec1bc45eb5d5625c1cc 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
28855ebcdbfa437e60bc16c761405476fe16bc39 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154851 pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
0bc4177e6b0d7a98464913af95d3bfe4b59b7a2c 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154857 fail c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
2ee270e126458471b178ca1e5d7d8d0afc48be39 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154860 pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
f5469067ee0260673ca1e554ff8888512a55ccfc 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154868 fail c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
b8c2efbe7b3e8fa5f0b0a3679afccd1204949070 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154872 pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
f5469067ee0260673ca1e554ff8888512a55ccfc 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154877 fail c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
b8c2efbe7b3e8fa5f0b0a3679afccd1204949070 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154882 pass c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
f5469067ee0260673ca1e554ff8888512a55ccfc 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
 154886 fail c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
b8c2efbe7b3e8fa5f0b0a3679afccd1204949070 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
Searching for interesting versions
 Result found: flight 151892 (pass), for basis pass
 For basis failure, parent search stopping at 
c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
f5469067ee0260673ca1e554ff8888512a55ccfc 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa, results HASH(0x563315981980) 
HASH(0x5633159356b0) HASH(0x563315964e78) For basis failure, parent search 
stopping at c3038e718\
 a19fc596f7b1baba0f83d5146dc7784 c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
0bc4177e6b0d7a98464913af95d3bfe4b59b7a2c 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa, results HASH(0x563315977630) For 
basis failure, parent search stopping at 
c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 440121b54280ef1d7196bec1\
 bc45eb5d5625c1cc 3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
28855ebcdbfa437e60bc16c761405476fe16bc39 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa, results HASH(0x563315974400) For 
basis failure, parent search stopping at 
c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
1b461403ee723dab01d5828714cca0b9396a6b3c 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c38626\
 0 155821a1990b6de78dde5f98fa5ab90e802021e0 
483b43c4573329a28f1c9e18f90694e5be35ddb9 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa, results HASH(0x563315969488) For 
basis failure, parent search stopping at 
c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
a048af3c9073e4b8108e6cf920bbb35574059639 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
c3a0fc22af90ef28e68b116c6a49d9cec57f71cf 17d372b763cb0\
 b2e2e6b5a637c11f3997d2533fa, results HASH(0x563315944338) For basis failure, 
parent search stopping at c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
9f2d50f145191733e502667327c2129034a93099 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
c3a0fc22af90ef28e68b116c6a49d9cec57f71cf 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa, results HASH(0x56331595ab28) For 
basis failure, parent search stoppi\
 ng at c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
d9a4084544134eea50f62e88d79c466ae91f0455 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
88ab0c15525ced2eefe39220742efe4769089ad8 
02d69864b51a4302a148c28d6d391238a6778b4b 
f645a19115e666ce6401ca63b7d7388571463b55, results HASH(0x563315951bb8) 
HASH(0x563315947268) Result found: flight 154641 (fail), for basis failure (at 
ancestor ~5143)
 Repro found: flight 154777 (pass), for basis pass
 Repro found: flight 154815 (fail), for basis failure
 0 revisions at c3038e718a19fc596f7b1baba0f83d5146dc7784 
c530a75c1e6a472b0eb9558310b518f0dfcd8860 
fb97626fe04747ec89599dce0992def9a36e2f6b 
3c659044118e34603161457db9934a34f816d78b 
ea6d3cd1ed79d824e605a70c3626bc437c386260 
155821a1990b6de78dde5f98fa5ab90e802021e0 
f5469067ee0260673ca1e554ff8888512a55ccfc 
17d372b763cb0b2e2e6b5a637c11f3997d2533fa
No revisions left to test, checking graph state.
 Result found: flight 154860 (pass), for last pass
 Result found: flight 154868 (fail), for first failure
 Repro found: flight 154872 (pass), for last pass
 Repro found: flight 154877 (fail), for first failure
 Repro found: flight 154882 (pass), for last pass
 Repro found: flight 154886 (fail), for first failure

*** Found and reproduced problem changeset ***

  Bug is in tree:  xen git://xenbits.xen.org/xen.git
  Bug introduced:  b8c2efbe7b3e8fa5f0b0a3679afccd1204949070
  Bug not present: f5469067ee0260673ca1e554ff8888512a55ccfc
  Last fail repro: http://logs.test-lab.xenproject.org/osstest/logs/154886/


  commit b8c2efbe7b3e8fa5f0b0a3679afccd1204949070
  Author: Jan Beulich <jbeulich@xxxxxxxx>
  Date:   Tue Sep 22 16:13:34 2020 +0200
  
      evtchn/x86: enforce correct upper limit for 32-bit guests
      
      The recording of d->max_evtchns in evtchn_2l_init(), in particular with
      the limited set of callers of the function, is insufficient. Neither for
      PV nor for HVM guests the bitness is known at domain_create() time, yet
      the upper bound in 2-level mode depends upon guest bitness. Recording
      too high a limit "allows" x86 32-bit domains to open not properly usable
      event channels, management of which (inside Xen) would then result in
      corruption of the shared info and vCPU info structures.
      
      Keep the upper limit dynamic for the 2-level case, introducing a helper
      function to retrieve the effective limit. This helper is now supposed to
      be private to the event channel code. The used in do_poll() and
      domain_dump_evtchn_info() weren't consistent with port uses elsewhere
      and hence get switched to port_is_valid().
      
      Furthermore FIFO mode's setup_ports() gets adjusted to loop only up to
      the prior ABI limit, rather than all the way up to the new one.
      
      Finally a word on the change to do_poll(): Accessing ->max_evtchns
      without holding a suitable lock was never safe, as it as well as
      ->evtchn_port_ops may change behind do_poll()'s back. Using
      port_is_valid() instead widens some the window for potential abuse,
      until we've dealt with the race altogether (see XSA-343).
      
      This is XSA-342.
      
      Reported-by: Julien Grall <jgrall@xxxxxxxxxx>
      Fixes: 48974e6ce52e ("evtchn: use a per-domain variable for the max 
number of event channels")
      Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
      Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
      Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>

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