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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [xen-unstable bisection] complete test-amd64-amd64-xl-multivcpu
branch xen-unstable
xen branch xen-unstable
job test-amd64-amd64-xl-multivcpu
test guest-localmigrate
Tree: linux git://xenbits.xen.org/linux-pvops.git
Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git
Tree: qemu git://xenbits.xen.org/staging/qemu-xen-unstable.git
Tree: qemuu git://xenbits.xen.org/staging/qemu-upstream-unstable.git
Tree: xen git://xenbits.xen.org/xen.git
*** Found and reproduced problem changeset ***
Bug is in tree: xen git://xenbits.xen.org/xen.git
Bug introduced: d639e6a05a0f8ee0e61c6cc4eebba78934ef3648
Bug not present: 88a2372c6ba44dd42b915a95a823cf9d4d260e25
commit d639e6a05a0f8ee0e61c6cc4eebba78934ef3648
Author: Jan Beulich <jbeulich@xxxxxxxx>
Date: Mon Mar 23 16:51:14 2015 +0100
x86: allow 64-bit PV guest kernels to suppress user mode exposure of M2P
Xen L4 entries being uniformly installed into any L4 table and 64-bit
PV kernels running in ring 3 means that user mode was able to see the
read-only M2P presented by Xen to the guests. While apparently not
really representing an exploitable information leak, this still very
certainly was never meant to be that way.
Building on the fact that these guests already have separate kernel and
user mode page tables we can allow guest kernels to tell Xen that they
don't want user mode to see this table. We can't, however, do this by
default: There is no ABI requirement that kernel and user mode page
tables be separate. Therefore introduce a new VM-assist flag allowing
the guest to control respective hypervisor behavior:
- when not set, L4 tables get created with the respective slot blank,
and whenever the L4 table gets used as a kernel one the missing
mapping gets inserted,
- when set, L4 tables get created with the respective slot initialized
as before, and whenever the L4 table gets used as a user one the
mapping gets zapped.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Tim Deegan <tim@xxxxxxx>
For bisection revision-tuple graph see:
http://www.chiark.greenend.org.uk/~xensrcts/results/bisect.xen-unstable.test-amd64-amd64-xl-multivcpu.guest-localmigrate.html
Revision IDs in each graph node refer, respectively, to the Trees above.
----------------------------------------
Searching for failure / basis pass:
36772 fail [host=scape-moth] / 36622 [host=potato-beetle] 36540
[host=fire-frog] 36514 [host=bush-cricket] 35957 [host=field-cricket] 35887
[host=grain-weevil] 35810 [host=bush-cricket] 35556 ok.
Failure / basis pass flights: 36772 / 35556
(tree with no url: ovmf)
(tree with no url: seabios)
Tree: linux git://xenbits.xen.org/linux-pvops.git
Tree: linuxfirmware git://xenbits.xen.org/osstest/linux-firmware.git
Tree: qemu git://xenbits.xen.org/staging/qemu-xen-unstable.git
Tree: qemuu git://xenbits.xen.org/staging/qemu-upstream-unstable.git
Tree: xen git://xenbits.xen.org/xen.git
Latest 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
84066dd4ef4bb5983e246c629a26ef4f3394e5d5
Basis pass a74f1d1204a5c892466b52ac68ee6443c1e459d7
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
0d37748342e29854db7c9f6c47d7f58c6cfba6b2
befe0a0da90d7ac063fd8b5891c7d0caeeeefa5f
Generating revisions with ./adhoc-revtuple-generator
git://xenbits.xen.org/linux-pvops.git#a74f1d1204a5c892466b52ac68ee6443c1e459d7-8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
git://xenbits.xen.org/osstest/linux-firmware.git#c530a75c1e6a472b0eb9558310b518f0dfcd8860-c530a75c1e6a472b0eb9558310b518f0dfcd8860
git://xenbits.xen.org/staging/qemu-xen-unstable.git#a4b276b4ce49c8d70dd841ff885b900ec652b994-a4b276b4ce49c8d70dd841ff885b900ec652b994
git://xenbits.xen.org/staging/qemu-upstream-unstable.git#0d37748342e29854db7c9f6c47d7f58c6cfba6b2-42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
git://xenbits.xen.org/xen.git#befe0a0da90d7ac063fd8b5891c7d0caeeeefa5f-84066dd4ef4bb5983e246c629a26ef4f3394e5d5
+ exec
+ sh -xe
+ cd /export/home/osstest/repos/linux-pvops
+ git remote set-url origin
git://drall.uk.xensource.com:9419/git://xenbits.xen.org/linux-pvops.git
+ git fetch -p origin +refs/heads/*:refs/remotes/origin/*
+ exec
+ sh -xe
+ cd /export/home/osstest/repos/qemu-upstream-unstable
+ git remote set-url origin
git://drall.uk.xensource.com:9419/git://xenbits.xen.org/staging/qemu-upstream-unstable.git
+ git fetch -p origin +refs/heads/*:refs/remotes/origin/*
+ exec
+ sh -xe
+ cd /export/home/osstest/repos/xen
+ git remote set-url origin
git://drall.uk.xensource.com:9419/git://xenbits.xen.org/xen.git
+ git fetch -p origin +refs/heads/*:refs/remotes/origin/*
+ exec
+ sh -xe
+ cd /export/home/osstest/repos/linux-pvops
+ git remote set-url origin
git://drall.uk.xensource.com:9419/git://xenbits.xen.org/linux-pvops.git
+ git fetch -p origin +refs/heads/*:refs/remotes/origin/*
+ exec
+ sh -xe
+ cd /export/home/osstest/repos/qemu-upstream-unstable
+ git remote set-url origin
git://drall.uk.xensource.com:9419/git://xenbits.xen.org/staging/qemu-upstream-unstable.git
+ git fetch -p origin +refs/heads/*:refs/remotes/origin/*
+ exec
+ sh -xe
+ cd /export/home/osstest/repos/xen
+ git remote set-url origin
git://drall.uk.xensource.com:9419/git://xenbits.xen.org/xen.git
+ git fetch -p origin +refs/heads/*:refs/remotes/origin/*
Loaded 14502 nodes in revision graph
Searching for test results:
35556 pass a74f1d1204a5c892466b52ac68ee6443c1e459d7
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
0d37748342e29854db7c9f6c47d7f58c6cfba6b2
befe0a0da90d7ac063fd8b5891c7d0caeeeefa5f
35709 []
35758 []
35810 [host=bush-cricket]
35887 [host=grain-weevil]
35957 [host=field-cricket]
36514 [host=bush-cricket]
36540 [host=fire-frog]
36622 [host=potato-beetle]
36772 fail 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
84066dd4ef4bb5983e246c629a26ef4f3394e5d5
36728 fail irrelevant
36914 pass a74f1d1204a5c892466b52ac68ee6443c1e459d7
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
0d37748342e29854db7c9f6c47d7f58c6cfba6b2
befe0a0da90d7ac063fd8b5891c7d0caeeeefa5f
36928 pass e8f616ae4f32159f77e60f73a4267b5806c418bd
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
2bd6add4f5fa4ea2ba9297d6139e9dea42ea70a9
36921 pass 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
916735e1814d4d6df0d90b871b0666cdfaf134cd
36917 fail 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
84066dd4ef4bb5983e246c629a26ef4f3394e5d5
36924 pass 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
51f2224552cc1e6cb22b8b169999cd9711bc8cbc
36925 pass 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
e32e9c76bcfc235cb29575c542709f327ba72cb4
36929 pass e8f616ae4f32159f77e60f73a4267b5806c418bd
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
cde92647ea4f5c487059a3c89f2e3f1aec9a42d3
36931 blocked e8f616ae4f32159f77e60f73a4267b5806c418bd
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
879b181f38b0e4e3c7314de980289f4ecd1c5982
36933 blocked e8f616ae4f32159f77e60f73a4267b5806c418bd
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
72c7e0ffd15f48f346e1b740d074679d5207e5d1
36934 pass e8f616ae4f32159f77e60f73a4267b5806c418bd
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
7f0638e914a542f20e8bb369dd476dfc6c020f0a
36936 pass e7f3db14eacaf1993a70b1517582603dfdf34988
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
fe3cafd89ab7a9e171a4e8542b00f5f08c7b4f2f
36938 pass f3995eb51ca8cab80105fb01f128f10839298145
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
fe3cafd89ab7a9e171a4e8542b00f5f08c7b4f2f
36939 pass 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
1c91d6fba20c1517d78076d412d33cb41f501be5
36941 fail 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
d639e6a05a0f8ee0e61c6cc4eebba78934ef3648
36946 pass 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
4fa6b0bacf9cbd37b67b4895906f9e3b1336a8fc
36948 pass 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
4366f3e99f64fbbe44e3cdac9ae7dbdd72296bc9
36950 pass 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
78d22f2dfcff39336ba0861f4bb5f8d0f380b7d4
36952 pass 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
88a2372c6ba44dd42b915a95a823cf9d4d260e25
36954 fail 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
d639e6a05a0f8ee0e61c6cc4eebba78934ef3648
36955 pass 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
88a2372c6ba44dd42b915a95a823cf9d4d260e25
36958 fail 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
d639e6a05a0f8ee0e61c6cc4eebba78934ef3648
36961 pass 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
88a2372c6ba44dd42b915a95a823cf9d4d260e25
36962 fail 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
d639e6a05a0f8ee0e61c6cc4eebba78934ef3648
Searching for interesting versions
Result found: flight 35556 (pass), for basis pass
Result found: flight 36772 (fail), for basis failure
Repro found: flight 36914 (pass), for basis pass
Repro found: flight 36917 (fail), for basis failure
0 revisions at 8a5f782c33c04ea5c9b3ca6fb32d6039e2e5c0c9
c530a75c1e6a472b0eb9558310b518f0dfcd8860
a4b276b4ce49c8d70dd841ff885b900ec652b994
42ffdf360dd9df66b0a4a7ada059c02a3cf3a8de
88a2372c6ba44dd42b915a95a823cf9d4d260e25
No revisions left to test, checking graph state.
Result found: flight 36952 (pass), for last pass
Result found: flight 36954 (fail), for first failure
Repro found: flight 36955 (pass), for last pass
Repro found: flight 36958 (fail), for first failure
Repro found: flight 36961 (pass), for last pass
Repro found: flight 36962 (fail), for first failure
*** Found and reproduced problem changeset ***
Bug is in tree: xen git://xenbits.xen.org/xen.git
Bug introduced: d639e6a05a0f8ee0e61c6cc4eebba78934ef3648
Bug not present: 88a2372c6ba44dd42b915a95a823cf9d4d260e25
+ exec
+ sh -xe
+ cd /export/home/osstest/repos/xen
+ git remote set-url origin
git://drall.uk.xensource.com:9419/git://xenbits.xen.org/xen.git
+ git fetch -p origin +refs/heads/*:refs/remotes/origin/*
commit d639e6a05a0f8ee0e61c6cc4eebba78934ef3648
Author: Jan Beulich <jbeulich@xxxxxxxx>
Date: Mon Mar 23 16:51:14 2015 +0100
x86: allow 64-bit PV guest kernels to suppress user mode exposure of M2P
Xen L4 entries being uniformly installed into any L4 table and 64-bit
PV kernels running in ring 3 means that user mode was able to see the
read-only M2P presented by Xen to the guests. While apparently not
really representing an exploitable information leak, this still very
certainly was never meant to be that way.
Building on the fact that these guests already have separate kernel and
user mode page tables we can allow guest kernels to tell Xen that they
don't want user mode to see this table. We can't, however, do this by
default: There is no ABI requirement that kernel and user mode page
tables be separate. Therefore introduce a new VM-assist flag allowing
the guest to control respective hypervisor behavior:
- when not set, L4 tables get created with the respective slot blank,
and whenever the L4 table gets used as a kernel one the missing
mapping gets inserted,
- when set, L4 tables get created with the respective slot initialized
as before, and whenever the L4 table gets used as a user one the
mapping gets zapped.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Tim Deegan <tim@xxxxxxx>
Revision graph left in
/home/xc_osstest/results/bisect.xen-unstable.test-amd64-amd64-xl-multivcpu.guest-localmigrate.{dot,ps,png,html}.
----------------------------------------
36962: tolerable ALL FAIL
flight 36962 xen-unstable real-bisect [real]
http://www.chiark.greenend.org.uk/~xensrcts/logs/36962/
Failures :-/ but no regressions.
Tests which did not succeed,
including tests which could not be run:
test-amd64-amd64-xl-multivcpu 12 guest-localmigrate fail baseline untested
jobs:
test-amd64-amd64-xl-multivcpu fail
------------------------------------------------------------
sg-report-flight on osstest.cam.xci-test.com
logs: /home/xc_osstest/logs
images: /home/xc_osstest/images
Logs, config files, etc. are available at
http://www.chiark.greenend.org.uk/~xensrcts/logs
Test harness code can be found at
http://xenbits.xensource.com/gitweb?p=osstest.git;a=summary
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