bisecting cause commit starting from c4b9850b3676869ac0def5885d781d17f64b3a86
building syzkaller on 8c88c9c1c99c8cd8dabc951164c820b9c9f25114
testing commit c4b9850b3676869ac0def5885d781d17f64b3a86 with gcc (GCC) 8.1.0
all runs: crashed: INFO: task syz-executor can't die for more than 143 seconds.
testing release v5.3
testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0
run #0: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor917484260" "root@10.128.15.202:./syz-executor917484260"]: exit status 1
Connection timed out during banner exchange
lost connection

run #1: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor104608157" "root@10.128.15.204:./syz-executor104608157"]: exit status 1
Connection timed out during banner exchange
lost connection

run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
# git bisect start c4b9850b3676869ac0def5885d781d17f64b3a86 v5.3
Bisecting: 9265 revisions left to test after this (roughly 13 steps)
[574cc4539762561d96b456dbc0544d8898bd4c6e] Merge tag 'drm-next-2019-09-18' of git://anongit.freedesktop.org/drm/drm
testing commit 574cc4539762561d96b456dbc0544d8898bd4c6e with gcc (GCC) 8.1.0
all runs: crashed: no output from test machine
# git bisect bad 574cc4539762561d96b456dbc0544d8898bd4c6e
Bisecting: 5224 revisions left to test after this (roughly 12 steps)
[6cfae0c26b21dce323fe8799b66cf4bc996e3565] Merge tag 'char-misc-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
testing commit 6cfae0c26b21dce323fe8799b66cf4bc996e3565 with gcc (GCC) 8.1.0
run #0: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor641852684" "root@10.128.0.191:./syz-executor641852684"]: exit status 1
Connection timed out during banner exchange
lost connection

run #1: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor108987422" "root@10.128.0.242:./syz-executor108987422"]: exit status 1
Connection timed out during banner exchange
lost connection

run #2: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor963732530" "root@10.128.0.94:./syz-executor963732530"]: exit status 1
Connection timed out during banner exchange
lost connection

run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
# git bisect good 6cfae0c26b21dce323fe8799b66cf4bc996e3565
Bisecting: 2582 revisions left to test after this (roughly 11 steps)
[7d14df2d280fb7411eba2eb96682da0683ad97f6] Merge tag 'for-5.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
testing commit 7d14df2d280fb7411eba2eb96682da0683ad97f6 with gcc (GCC) 8.1.0
all runs: crashed: no output from test machine
# git bisect bad 7d14df2d280fb7411eba2eb96682da0683ad97f6
Bisecting: 1320 revisions left to test after this (roughly 10 steps)
[70911d96380692d6fdbae7c7421da844166047c1] mt76: mt7615: add radar pattern test knob to debugfs
testing commit 70911d96380692d6fdbae7c7421da844166047c1 with gcc (GCC) 8.1.0
all runs: crashed: no output from test machine
# git bisect bad 70911d96380692d6fdbae7c7421da844166047c1
Bisecting: 660 revisions left to test after this (roughly 9 steps)
[65dedd7fe1f224e9989181d161e23f0a544d304f] RDS: limit the number of times we loop in rds_send_xmit
testing commit 65dedd7fe1f224e9989181d161e23f0a544d304f with gcc (GCC) 8.1.0
all runs: crashed: no output from test machine
# git bisect bad 65dedd7fe1f224e9989181d161e23f0a544d304f
Bisecting: 329 revisions left to test after this (roughly 8 steps)
[cb1b5226cbdf0bc01dcdd8d422d4051fec1b77ef] fm10k: remove needless initialization of size local variable
testing commit cb1b5226cbdf0bc01dcdd8d422d4051fec1b77ef with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip cb1b5226cbdf0bc01dcdd8d422d4051fec1b77ef
Bisecting: 329 revisions left to test after this (roughly 8 steps)
[bfcd8d791ec18496772d117774398e336917f56e] bnxt_en: Add fast path logic for TPA on 57500 chips.
testing commit bfcd8d791ec18496772d117774398e336917f56e with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip bfcd8d791ec18496772d117774398e336917f56e
Bisecting: 329 revisions left to test after this (roughly 8 steps)
[105333435b4f3b21ffc325f32fae17719310db64] netfilter: connlabels: prefer static lock initialiser
testing commit 105333435b4f3b21ffc325f32fae17719310db64 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 105333435b4f3b21ffc325f32fae17719310db64
Bisecting: 329 revisions left to test after this (roughly 8 steps)
[842a2eb28f14b184c7a653448f402f5273e6ff5c] net/mlx5e: Print a warning when LRO feature is dropped or not allowed
testing commit 842a2eb28f14b184c7a653448f402f5273e6ff5c with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 842a2eb28f14b184c7a653448f402f5273e6ff5c
Bisecting: 329 revisions left to test after this (roughly 8 steps)
[558e93c93f7843297752db6c491517b311bfb19a] i40e: Remove unicast log when VF is leaving multicast mode.
testing commit 558e93c93f7843297752db6c491517b311bfb19a with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 558e93c93f7843297752db6c491517b311bfb19a
Bisecting: 329 revisions left to test after this (roughly 8 steps)
[b54c9d5bd6e38edac9ce3a3f95f14a1292b5268d] net: Use skb_frag_off accessors
testing commit b54c9d5bd6e38edac9ce3a3f95f14a1292b5268d with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip b54c9d5bd6e38edac9ce3a3f95f14a1292b5268d
Bisecting: 329 revisions left to test after this (roughly 8 steps)
[9e8fb25254f76cb483303d8e9a97ed80a65418fe] Merge branch 'net-l3-l4-functional-tests'
testing commit 9e8fb25254f76cb483303d8e9a97ed80a65418fe with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 9e8fb25254f76cb483303d8e9a97ed80a65418fe
Bisecting: 329 revisions left to test after this (roughly 8 steps)
[8d72ab119f42f25abb393093472ae0ca275088b6] stmmac: no need to check return value of debugfs_create functions
testing commit 8d72ab119f42f25abb393093472ae0ca275088b6 with gcc (GCC) 8.1.0
run #0: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor088089346" "root@10.128.0.245:./syz-executor088089346"]: exit status 1
Connection timed out during banner exchange
lost connection

run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
# git bisect good 8d72ab119f42f25abb393093472ae0ca275088b6
Bisecting: 89 revisions left to test after this (roughly 6 steps)
[72ef80b5ee131e96172f19e74b4f98fa3404efe8] Merge branch 'bpf-libbpf-read-sysfs-btf'
testing commit 72ef80b5ee131e96172f19e74b4f98fa3404efe8 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 72ef80b5ee131e96172f19e74b4f98fa3404efe8
Bisecting: 89 revisions left to test after this (roughly 6 steps)
[043b8413e8c0c0ffbf8be268eb73716e05a96064] net: devlink: remove redundant rtnl lock assert
testing commit 043b8413e8c0c0ffbf8be268eb73716e05a96064 with gcc (GCC) 8.1.0
run #0: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor259520005" "root@10.128.0.86:./syz-executor259520005"]: exit status 1
Connection timed out during banner exchange
lost connection

run #1: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor998530976" "root@10.128.0.188:./syz-executor998530976"]: exit status 1
Connection timed out during banner exchange
lost connection

run #2: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor831656575" "root@10.128.0.193:./syz-executor831656575"]: exit status 1
Connection timed out during banner exchange
lost connection

run #3: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor009182420" "root@10.128.0.211:./syz-executor009182420"]: exit status 1
Connection timed out during banner exchange
lost connection

run #4: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor261949475" "root@10.128.0.29:./syz-executor261949475"]: exit status 1
Connection timed out during banner exchange
lost connection

run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
# git bisect good 043b8413e8c0c0ffbf8be268eb73716e05a96064
Bisecting: 20 revisions left to test after this (roughly 5 steps)
[c162610c7db2e9611a7b3ec806f9c97fcfec0b0b] Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
testing commit c162610c7db2e9611a7b3ec806f9c97fcfec0b0b with gcc (GCC) 8.1.0
all runs: crashed: no output from test machine
# git bisect bad c162610c7db2e9611a7b3ec806f9c97fcfec0b0b
Bisecting: 13 revisions left to test after this (roughly 4 steps)
[2a475c409fe81a76fb26a6b023509d648237bbe6] kbuild: remove all netfilter headers from header-test blacklist.
testing commit 2a475c409fe81a76fb26a6b023509d648237bbe6 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 2a475c409fe81a76fb26a6b023509d648237bbe6
Bisecting: 13 revisions left to test after this (roughly 4 steps)
[47e640af2e492cc28778dd6f894d50313f7fba75] netfilter: add missing IS_ENABLED(CONFIG_NF_TABLES) check to header-file.
testing commit 47e640af2e492cc28778dd6f894d50313f7fba75 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 47e640af2e492cc28778dd6f894d50313f7fba75
Bisecting: 13 revisions left to test after this (roughly 4 steps)
[65b27995a4ab8fc51b4adc6b4dcdca20f7a595bb] net: phy: let phy_speed_down/up support speeds >1Gbps
testing commit 65b27995a4ab8fc51b4adc6b4dcdca20f7a595bb with gcc (GCC) 8.1.0
run #0: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor767277966" "root@10.128.0.8:./syz-executor767277966"]: exit status 1
Connection timed out during banner exchange
lost connection

run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
# git bisect good 65b27995a4ab8fc51b4adc6b4dcdca20f7a595bb
Bisecting: 11 revisions left to test after this (roughly 4 steps)
[20a9379d9a03ee0712d225035308973ecc5f6783] netfilter: remove "#ifdef __KERNEL__" guards from some headers.
testing commit 20a9379d9a03ee0712d225035308973ecc5f6783 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 20a9379d9a03ee0712d225035308973ecc5f6783
Bisecting: 11 revisions left to test after this (roughly 4 steps)
[1b90af292e71b20d03b837d39406acfbdc5d4b2a] ipvs: Improve robustness to the ipvs sysctl
testing commit 1b90af292e71b20d03b837d39406acfbdc5d4b2a with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 1b90af292e71b20d03b837d39406acfbdc5d4b2a
Bisecting: 11 revisions left to test after this (roughly 4 steps)
[5785cf15fd74ec3b1a076fd39bc67382a8455fe7] netfilter: nf_tables: add missing prototypes.
testing commit 5785cf15fd74ec3b1a076fd39bc67382a8455fe7 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 5785cf15fd74ec3b1a076fd39bc67382a8455fe7
Bisecting: 11 revisions left to test after this (roughly 4 steps)
[d55d70894c6d4709b9ae61109a9fa7c319586b53] r8152: use alloc_pages for rx buffer
testing commit d55d70894c6d4709b9ae61109a9fa7c319586b53 with gcc (GCC) 8.1.0
run #0: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor337626188" "root@10.128.15.215:./syz-executor337626188"]: exit status 1
Connection timed out during banner exchange
lost connection

run #1: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor198238523" "root@10.128.0.203:./syz-executor198238523"]: exit status 1
Connection timed out during banner exchange
lost connection

run #2: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor912984926" "root@10.128.15.209:./syz-executor912984926"]: exit status 1
Connection timed out during banner exchange
lost connection

run #3: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor099368818" "root@10.128.0.172:./syz-executor099368818"]: exit status 1
Connection timed out during banner exchange
lost connection

run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
# git bisect good d55d70894c6d4709b9ae61109a9fa7c319586b53
Bisecting: 9 revisions left to test after this (roughly 3 steps)
[0abc8bf4f2842e409926096f0fa009b468cbd855] netfilter: add missing IS_ENABLED(CONFIG_NF_CONNTRACK) checks to some header-files.
testing commit 0abc8bf4f2842e409926096f0fa009b468cbd855 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 0abc8bf4f2842e409926096f0fa009b468cbd855
Bisecting: 9 revisions left to test after this (roughly 3 steps)
[78458e3e08cda2aacaec9fde8c295dfc2f88618a] netfilter: add missing IS_ENABLED(CONFIG_NETFILTER) checks to some header-files.
testing commit 78458e3e08cda2aacaec9fde8c295dfc2f88618a with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 78458e3e08cda2aacaec9fde8c295dfc2f88618a
Bisecting: 9 revisions left to test after this (roughly 3 steps)
[7e59b3fea2a2510b52761c20ccc71d3e9f6b7db8] netfilter: remove unnecessary spaces
testing commit 7e59b3fea2a2510b52761c20ccc71d3e9f6b7db8 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 7e59b3fea2a2510b52761c20ccc71d3e9f6b7db8
Bisecting: 9 revisions left to test after this (roughly 3 steps)
[9211bfbff80a7604273086fec5685efcdc10be2b] netfilter: add missing IS_ENABLED(CONFIG_BRIDGE_NETFILTER) checks to header-file.
testing commit 9211bfbff80a7604273086fec5685efcdc10be2b with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 9211bfbff80a7604273086fec5685efcdc10be2b
Bisecting: 9 revisions left to test after this (roughly 3 steps)
[b753c5a7f99f390fc100de18647ce0dcacdceafc] Merge branch 'r8152-RX-improve'
testing commit b753c5a7f99f390fc100de18647ce0dcacdceafc with gcc (GCC) 8.1.0
run #0: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor705661416" "root@10.128.15.226:./syz-executor705661416"]: exit status 1
Connection timed out during banner exchange
lost connection

run #1: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor557293914" "root@10.128.10.61:./syz-executor557293914"]: exit status 1
Connection timed out during banner exchange
lost connection

run #2: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor629514993" "root@10.128.10.6:./syz-executor629514993"]: exit status 1
Connection timed out during banner exchange
lost connection

run #3: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor494956956" "root@10.128.1.23:./syz-executor494956956"]: exit status 1
Connection timed out during banner exchange
lost connection

run #4: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor111277237" "root@10.128.15.222:./syz-executor111277237"]: exit status 1
Connection timed out during banner exchange
lost connection

run #5: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor605671087" "root@10.128.0.177:./syz-executor605671087"]: exit status 1
Connection timed out during banner exchange
lost connection

run #6: OK
run #7: OK
run #8: OK
run #9: OK
# git bisect good b753c5a7f99f390fc100de18647ce0dcacdceafc
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[a1b2f04ea527397fcacacd09e0d690927feef429] netfilter: add missing includes to a number of header-files.
testing commit a1b2f04ea527397fcacacd09e0d690927feef429 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip a1b2f04ea527397fcacacd09e0d690927feef429
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[0a30ba509fdeea740bedb81ce3bee4f74a759654] netfilter: nf_nat_proto: make tables static
testing commit 0a30ba509fdeea740bedb81ce3bee4f74a759654 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 0a30ba509fdeea740bedb81ce3bee4f74a759654
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[bd96b4c75675e616eefef6d85d163530eef9c5e5] netfilter: inline four headers files into another one.
testing commit bd96b4c75675e616eefef6d85d163530eef9c5e5 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip bd96b4c75675e616eefef6d85d163530eef9c5e5
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[bd8699e9e29287b5571b32b68c3dcd05985fa9b1] netfilter: nft_bitwise: add offload support
testing commit bd8699e9e29287b5571b32b68c3dcd05985fa9b1 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip bd8699e9e29287b5571b32b68c3dcd05985fa9b1
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[43dd16efc7f235f153804500a4363769bd2276fc] netfilter: nf_tables: store data in offload context registers
testing commit 43dd16efc7f235f153804500a4363769bd2276fc with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 43dd16efc7f235f153804500a4363769bd2276fc
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[e84fb4b3666dabd3917952fb33588daa891a6ad3] netfilter: conntrack: use shared sysctl constants
testing commit e84fb4b3666dabd3917952fb33588daa891a6ad3 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip e84fb4b3666dabd3917952fb33588daa891a6ad3
Bisecting: 8 revisions left to test after this (roughly 3 steps)
[8c0bb7873815bf8c3c4dfb24e8ebf4fefb4c35d2] netfilter: synproxy: rename mss synproxy_options field
testing commit 8c0bb7873815bf8c3c4dfb24e8ebf4fefb4c35d2 with gcc (GCC) 8.1.0
all runs: boot failed: WARNING: workqueue cpumask: online intersect > possible intersect
# git bisect skip 8c0bb7873815bf8c3c4dfb24e8ebf4fefb4c35d2
There are only 'skip'ped commits left to test.
The first bad commit could be any of:
9211bfbff80a7604273086fec5685efcdc10be2b
47e640af2e492cc28778dd6f894d50313f7fba75
a1b2f04ea527397fcacacd09e0d690927feef429
0abc8bf4f2842e409926096f0fa009b468cbd855
bd96b4c75675e616eefef6d85d163530eef9c5e5
43dd16efc7f235f153804500a4363769bd2276fc
78458e3e08cda2aacaec9fde8c295dfc2f88618a
20a9379d9a03ee0712d225035308973ecc5f6783
bd8699e9e29287b5571b32b68c3dcd05985fa9b1
2a475c409fe81a76fb26a6b023509d648237bbe6
7e59b3fea2a2510b52761c20ccc71d3e9f6b7db8
1b90af292e71b20d03b837d39406acfbdc5d4b2a
5785cf15fd74ec3b1a076fd39bc67382a8455fe7
0a30ba509fdeea740bedb81ce3bee4f74a759654
e84fb4b3666dabd3917952fb33588daa891a6ad3
105333435b4f3b21ffc325f32fae17719310db64
8c0bb7873815bf8c3c4dfb24e8ebf4fefb4c35d2
c162610c7db2e9611a7b3ec806f9c97fcfec0b0b
We cannot bisect more!
revisions tested: 37, total time: 10h47m25.106415566s (build: 3h33m52.823725455s, test: 7h2m47.127827646s)
bisection is inconclusive, the first bad commit could be any of:
9211bfbff80a7604273086fec5685efcdc10be2b
47e640af2e492cc28778dd6f894d50313f7fba75
a1b2f04ea527397fcacacd09e0d690927feef429
0abc8bf4f2842e409926096f0fa009b468cbd855
bd96b4c75675e616eefef6d85d163530eef9c5e5
43dd16efc7f235f153804500a4363769bd2276fc
78458e3e08cda2aacaec9fde8c295dfc2f88618a
20a9379d9a03ee0712d225035308973ecc5f6783
bd8699e9e29287b5571b32b68c3dcd05985fa9b1
2a475c409fe81a76fb26a6b023509d648237bbe6
7e59b3fea2a2510b52761c20ccc71d3e9f6b7db8
1b90af292e71b20d03b837d39406acfbdc5d4b2a
5785cf15fd74ec3b1a076fd39bc67382a8455fe7
0a30ba509fdeea740bedb81ce3bee4f74a759654
e84fb4b3666dabd3917952fb33588daa891a6ad3
105333435b4f3b21ffc325f32fae17719310db64
8c0bb7873815bf8c3c4dfb24e8ebf4fefb4c35d2
c162610c7db2e9611a7b3ec806f9c97fcfec0b0b