ci starts bisection 2022-10-05 13:23:36.218500317 +0000 UTC m=+13214.551972967
bisecting cause commit starting from 0326074ff4652329f2a1a9c8685104576bd8d131
building syzkaller on 267e3bb1576b2f9fa97ae49305aaaa80768ba385
testing commit 0326074ff4652329f2a1a9c8685104576bd8d131 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 5ff3f02f5f8915bb7430e0d050450d5db109919a5a9526c95aca9849c0813d5e
run #0: crashed: KASAN: invalid-free in tcp_disconnect
run #1: crashed: KASAN: invalid-free in tcp_disconnect
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: KASAN: invalid-free in tcp_disconnect
run #4: crashed: KASAN: invalid-free in tcp_disconnect
run #5: crashed: KASAN: invalid-free in tcp_disconnect
run #6: crashed: KASAN: invalid-free in tcp_disconnect
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: INFO: rcu detected stall in corrupted
run #9: crashed: INFO: rcu detected stall in corrupted
run #10: crashed: INFO: rcu detected stall in corrupted
run #11: crashed: INFO: rcu detected stall in corrupted
run #12: crashed: INFO: rcu detected stall in corrupted
run #13: crashed: INFO: rcu detected stall in corrupted
run #14: crashed: INFO: rcu detected stall in corrupted
run #15: crashed: INFO: rcu detected stall in corrupted
run #16: crashed: INFO: rcu detected stall in corrupted
run #17: crashed: INFO: rcu detected stall in corrupted
run #18: crashed: INFO: rcu detected stall in corrupted
run #19: crashed: INFO: rcu detected stall in corrupted
testing release v6.0
testing commit 4fe89d07dcc2804c8b562f6c7896a45643d34b2f gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: cf7b183dd8d6888a7becd05d45120be27cb236020f8c78b6fa504ed3723c4ee0
run #0: crashed: possible deadlock in rds_tcp_reset_callbacks
run #1: crashed: possible deadlock in rds_tcp_reset_callbacks
run #2: crashed: possible deadlock in rds_tcp_reset_callbacks
run #3: crashed: possible deadlock in rds_tcp_reset_callbacks
run #4: crashed: possible deadlock in rds_tcp_reset_callbacks
run #5: crashed: possible deadlock in rds_tcp_reset_callbacks
run #6: crashed: possible deadlock in rds_tcp_reset_callbacks
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: crashed: possible deadlock in rds_tcp_reset_callbacks
run #9: crashed: INFO: rcu detected stall in corrupted
testing release v5.19
testing commit 3d7cb6b04c3f3115719235cc6866b10326de34cd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 74601db1f813ef5cd5fc8eceb5fb1c4296827e4fc43bf9a76f78d8ab74ffdb15
run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: exit status NUM
run #1: crashed: WARNING in inet_sock_destruct
run #2: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
reproducer seems to be flaky
testing release v5.18
testing commit 4b0986a3613c92f4ec1bdc7f60ec66fea135991f gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 5bb361030dd8f131e032f6a81109d54f28a958bcbb5124e71843d382c53a053f
run #0: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #1: crashed: WARNING in inet_sock_destruct
run #2: crashed: WARNING in inet_sock_destruct
run #3: crashed: WARNING in inet_sock_destruct
run #4: crashed: WARNING in inet_sock_destruct
run #5: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #6: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #7: crashed: WARNING in inet_sock_destruct
run #8: crashed: WARNING in inet_sock_destruct
run #9: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #10: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing release v5.17
testing commit f443e374ae131c168a065ea1748feac6b2e76613 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 78a152039b172d03d0c4271fc9968476ad246c984e352fb3db3aecb23d48a87b
run #0: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #1: crashed: WARNING in inet_sock_destruct
run #2: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #3: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #4: crashed: WARNING in sk_destruct
run #5: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #6: crashed: WARNING in sk_destruct
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing release v5.16
testing commit df0cc57e057f18e44dac8e6c18aba47ab53202f9 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 471da6b529eb747771b9575ad81841f0c4380f0e6eab406b8bb49c6787b47bdf
run #0: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #1: crashed: WARNING in inet_sock_destruct
run #2: crashed: WARNING in inet_sock_destruct
run #3: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #4: crashed: WARNING in inet_sock_destruct
run #5: crashed: WARNING in inet_sock_destruct
run #6: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #7: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing release v5.15
testing commit 8bb7eca972ad531c9b149c0a51ab43a417385813 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: f3c1ee4f57b61459e30d8752e76047edafbcddd374176502ad360678e3414990
all runs: OK
# git bisect start df0cc57e057f18e44dac8e6c18aba47ab53202f9 8bb7eca972ad531c9b149c0a51ab43a417385813
Bisecting: 7870 revisions left to test after this (roughly 13 steps)
[2219b0ceefe835b92a8a74a73fe964aa052742a2] Merge tag 'soc-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

testing commit 2219b0ceefe835b92a8a74a73fe964aa052742a2 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 54d17a2ff2fbaba97f63d2c7bb825974e73480479f493c5a57b499b71fb4cf2a
run #0: crashed: WARNING in inet_sock_destruct
run #1: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 2219b0ceefe835b92a8a74a73fe964aa052742a2
Bisecting: 2946 revisions left to test after this (roughly 12 steps)
[fc02cb2b37fe2cbf1d3334b9f0f0eab9431766c4] Merge tag 'net-next-for-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

testing commit fc02cb2b37fe2cbf1d3334b9f0f0eab9431766c4 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: d0b08f9cd212a71e11b5d1c58f72d502979b384de98b43a58846db3d32f9e91a
run #0: crashed: WARNING in inet_sock_destruct
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
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad fc02cb2b37fe2cbf1d3334b9f0f0eab9431766c4
Bisecting: 2251 revisions left to test after this (roughly 11 steps)
[b7b98f868987cd3e86c9bd9a6db048614933d7a0] Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

testing commit b7b98f868987cd3e86c9bd9a6db048614933d7a0 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 68c3b48a0d9fa8da6de02114531efeff77a38fbaf754c49ad11bcaedf90ad6c5
all runs: crashed: WARNING in skb_try_coalesce
# git bisect bad b7b98f868987cd3e86c9bd9a6db048614933d7a0
Bisecting: 1156 revisions left to test after this (roughly 10 steps)
[9fd3d5dced976640f588e0a866b9611db2d2cb37] net: ethernet: ave: Add compatible string and SoC-dependent data for NX1 SoC

testing commit 9fd3d5dced976640f588e0a866b9611db2d2cb37 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 424413cd8f1f4757a0d8ffb2b3e0ab8c638def956cff65d263c08658f229b496
run #0: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #1: crashed: WARNING in inet_sock_destruct
run #2: crashed: WARNING in inet_sock_destruct
run #3: crashed: WARNING in inet_sock_destruct
run #4: crashed: WARNING in inet_sock_destruct
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 9fd3d5dced976640f588e0a866b9611db2d2cb37
Bisecting: 578 revisions left to test after this (roughly 9 steps)
[a96d317fb1a30b9f323548eb2ff05d4e4600ead9] ethernet: use eth_hw_addr_set()

testing commit a96d317fb1a30b9f323548eb2ff05d4e4600ead9 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 0dc4483474b0ed9d6fd4df03246d75ba3bb13fbbc1ae7a4feda109b60bbe11dd
run #0: crashed: WARNING in inet_sock_destruct
run #1: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #2: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #3: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #4: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #5: crashed: WARNING in inet_sock_destruct
run #6: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #7: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad a96d317fb1a30b9f323548eb2ff05d4e4600ead9
Bisecting: 288 revisions left to test after this (roughly 8 steps)
[6c2509d4463640c4b91d5937b5b2ff5ca07f6567] net/mlx5e: Add error flow for ethtool -X command

testing commit 6c2509d4463640c4b91d5937b5b2ff5ca07f6567 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 5b04db1981b7869f84e0ac3f0a1283d5ea49e93f6f768c264f6943a73dfa835e
run #0: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.39:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.39 port 22 timed out
lost connection

run #1: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.1.80:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.1.80 port 22 timed out
lost connection

run #2: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.10.54:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.10.54 port 22 timed out
lost connection

run #3: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.154:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.154 port 22 timed out
lost connection

run #4: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.82:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.82 port 22 timed out
lost connection

run #5: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.68:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.68 port 22 timed out
lost connection

run #6: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.10.55:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.10.55 port 22 timed out
lost connection

run #7: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.10.56:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.10.56 port 22 timed out
lost connection

run #8: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.10.57:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.10.57 port 22 timed out
lost connection

run #9: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.10.60:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.10.60 port 22 timed out
lost connection

run #10: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.10.62:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.10.62 port 22 timed out
lost connection

run #11: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.156:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.156 port 22 timed out
lost connection

run #12: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.192:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.192 port 22 timed out
lost connection

run #13: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.195:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.195 port 22 timed out
lost connection

run #14: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.194:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.194 port 22 timed out
lost connection

run #15: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.195:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.195 port 22 timed out
lost connection

run #16: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.196:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.196 port 22 timed out
lost connection

run #17: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.197:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.197 port 22 timed out
lost connection

run #18: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.1.14:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.1.14 port 22 timed out
lost connection

run #19: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.198:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.198 port 22 timed out
lost connection

# git bisect skip 6c2509d4463640c4b91d5937b5b2ff5ca07f6567
Bisecting: 288 revisions left to test after this (roughly 8 steps)
[fc13d8c03773e48cd775aecdbd281b1cbad87ac2] net: bcmgenet: pull mac_config from adjust_link

testing commit fc13d8c03773e48cd775aecdbd281b1cbad87ac2 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 126e14134af23e0961f1aeffd300b811406621665c63aea331c0d2a6548215f9
all runs: basic kernel testing failed: WARNING in devlink_nl_region_notify
# git bisect skip fc13d8c03773e48cd775aecdbd281b1cbad87ac2
Bisecting: 288 revisions left to test after this (roughly 8 steps)
[4a907f659461908cd546bca083b373f6de20aa24] selftests: net: mscc: ocelot: rename the VLAN modification test to ingress

testing commit 4a907f659461908cd546bca083b373f6de20aa24 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 64538620384fcd9c49de3e6e5cfe0e40195786c2f7a0a47df80e39854ba3b24f
run #0: crashed: KFENCE: use-after-free in tcp_cdg_cwnd_event
run #1: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #2: crashed: KASAN: use-after-free Write in tcp_cdg_cwnd_event
run #3: crashed: WARNING in inet_sock_destruct
run #4: crashed: WARNING in inet_sock_destruct
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 4a907f659461908cd546bca083b373f6de20aa24
Bisecting: 286 revisions left to test after this (roughly 8 steps)
[40bc6063796ec77b6073861f9a1993be20d5befd] tcp: tracking packets with CE marks in BW rate sample

testing commit 40bc6063796ec77b6073861f9a1993be20d5befd gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: f92e07a6eb814de66353e5d1247fa54055fda33efc60772cc9b70c56f9f745cb
run #0: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.72:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.72 port 22 timed out
lost connection

run #1: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.151:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.151 port 22 timed out
lost connection

run #2: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.187:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.187 port 22 timed out
lost connection

run #3: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.191:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.191 port 22 timed out
lost connection

run #4: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.205:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.205 port 22 timed out
lost connection

run #5: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.1.85:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.1.85 port 22 timed out
lost connection

run #6: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.1.99:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.1.99 port 22 timed out
lost connection

run #7: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.10.7:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.10.7 port 22 timed out
lost connection

run #8: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.197:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.197 port 22 timed out
lost connection

run #9: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.201:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.201 port 22 timed out
lost connection

run #10: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.204:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.204 port 22 timed out
lost connection

run #11: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.192:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.192 port 22 timed out
lost connection

run #12: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.206:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.206 port 22 timed out
lost connection

run #13: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.210:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.210 port 22 timed out
lost connection

run #14: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.211:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.211 port 22 timed out
lost connection

run #15: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.214:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.214 port 22 timed out
lost connection

run #16: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.215:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.215 port 22 timed out
lost connection

run #17: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.15.217:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.15.217 port 22 timed out
lost connection

run #18: basic kernel testing failed: failed to copy syz-execprog 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" "/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/bin/linux_amd64/syz-execprog" "root@10.128.0.213:./syz-execprog"]: exit status 1
Connection timed out during banner exchange
Connection to 10.128.0.213 port 22 timed out
lost connection

run #19: OK
# git bisect skip 40bc6063796ec77b6073861f9a1993be20d5befd
Bisecting: 286 revisions left to test after this (roughly 8 steps)
[e876a0367c379519f8558342fda30e74e0295893] Merge branch 'bpf-xsk-selftests'

testing commit e876a0367c379519f8558342fda30e74e0295893 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 04b2914f9d64ef03e57eb71713a0eab448e95d6638b479b7d8a7820f715f0099
run #0: crashed: WARNING in sk_stream_kill_queues
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
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad e876a0367c379519f8558342fda30e74e0295893
Bisecting: 13 revisions left to test after this (roughly 4 steps)
[53cb3cec2f1e2c2c0c3624f20675d01e84a8bbac] selftests: xsx: Introduce test name in test spec

testing commit 53cb3cec2f1e2c2c0c3624f20675d01e84a8bbac gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 04b2914f9d64ef03e57eb71713a0eab448e95d6638b479b7d8a7820f715f0099
all runs: OK
# git bisect good 53cb3cec2f1e2c2c0c3624f20675d01e84a8bbac
Bisecting: 6 revisions left to test after this (roughly 3 steps)
[8ce7192b508df2c54932e245bbc6ce04cfe174a7] selftests: xsk: Eliminate MAX_SOCKS define

testing commit 8ce7192b508df2c54932e245bbc6ce04cfe174a7 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 04b2914f9d64ef03e57eb71713a0eab448e95d6638b479b7d8a7820f715f0099
run #0: OK
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: crashed: KASAN: use-after-free Read in __d_alloc
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
# git bisect bad 8ce7192b508df2c54932e245bbc6ce04cfe174a7
Bisecting: 3 revisions left to test after this (roughly 2 steps)
[55be575dc13ccfc9bf27ebb5af938b70206a9eb5] selftests: xsk: Replace second_step global variable

testing commit 55be575dc13ccfc9bf27ebb5af938b70206a9eb5 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 04b2914f9d64ef03e57eb71713a0eab448e95d6638b479b7d8a7820f715f0099
all runs: OK
# git bisect good 55be575dc13ccfc9bf27ebb5af938b70206a9eb5
Bisecting: 1 revision left to test after this (roughly 1 step)
[af6731d1e1c69b4ee32063acd51ec86ece0a1ced] selftests: xsk: Make xdp_flags and bind_flags local

testing commit af6731d1e1c69b4ee32063acd51ec86ece0a1ced gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 04b2914f9d64ef03e57eb71713a0eab448e95d6638b479b7d8a7820f715f0099
all runs: OK
# git bisect good af6731d1e1c69b4ee32063acd51ec86ece0a1ced
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[e2d850d5346c3cd751b032a7dccdd472013b8a84] selftests: xsx: Make pthreads local scope

testing commit e2d850d5346c3cd751b032a7dccdd472013b8a84 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 04b2914f9d64ef03e57eb71713a0eab448e95d6638b479b7d8a7820f715f0099
run #0: crashed: WARNING in sk_stream_kill_queues
run #1: crashed: WARNING in sk_stream_kill_queues
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: crashed: KASAN: use-after-free Read in __d_alloc
run #18: OK
run #19: OK
# git bisect bad e2d850d5346c3cd751b032a7dccdd472013b8a84
e2d850d5346c3cd751b032a7dccdd472013b8a84 is the first bad commit
commit e2d850d5346c3cd751b032a7dccdd472013b8a84
Author: Magnus Karlsson <magnus.karlsson@intel.com>
Date:   Tue Sep 7 09:19:21 2021 +0200

    selftests: xsx: Make pthreads local scope
    
    Make the pthread_t variables local scope instead of global. No reason
    for them to be global.
    
    Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
    Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
    Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
    Link: https://lore.kernel.org/bpf/20210907071928.9750-14-magnus.karlsson@gmail.com

 tools/testing/selftests/bpf/xdpxceiver.c | 1 +
 tools/testing/selftests/bpf/xdpxceiver.h | 2 --
 2 files changed, 1 insertion(+), 2 deletions(-)

culprit signature: 04b2914f9d64ef03e57eb71713a0eab448e95d6638b479b7d8a7820f715f0099
parent  signature: 04b2914f9d64ef03e57eb71713a0eab448e95d6638b479b7d8a7820f715f0099
Reproducer flagged being flaky
revisions tested: 22, total time: 6h7m52.942753883s (build: 2h29m34.228727057s, test: 3h35m8.425416469s)
first bad commit: e2d850d5346c3cd751b032a7dccdd472013b8a84 selftests: xsx: Make pthreads local scope
recipients (to): ["daniel@iogearbox.net" "maciej.fijalkowski@intel.com" "magnus.karlsson@intel.com"]
recipients (cc): []
crash: KASAN: use-after-free Read in __d_alloc
==================================================================
BUG: KASAN: use-after-free in memcpy include/linux/fortify-string.h:191 [inline]
BUG: KASAN: use-after-free in __d_alloc+0x161/0x950 fs/dcache.c:1775
Read of size 5 at addr ffff888075825520 by task kdevtmpfs/22

CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x57/0x7d lib/dump_stack.c:105
 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:256
 __kasan_report mm/kasan/report.c:442 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
 memcpy+0x20/0x60 mm/kasan/shadow.c:65
 memcpy include/linux/fortify-string.h:191 [inline]
 __d_alloc+0x161/0x950 fs/dcache.c:1775
 d_alloc+0x3f/0x200 fs/dcache.c:1823
 __lookup_hash+0x97/0x140 fs/namei.c:1554
 kern_path_locked+0x146/0x300 fs/namei.c:2567
 handle_remove+0x9a/0x4fa drivers/base/devtmpfs.c:312
 handle drivers/base/devtmpfs.c:382 [inline]
 devtmpfs_work_loop drivers/base/devtmpfs.c:395 [inline]
 devtmpfsd+0x176/0x24e drivers/base/devtmpfs.c:437
 kthread+0x38b/0x460 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Allocated by task 22:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 __kasan_slab_alloc+0x83/0xb0 mm/kasan/common.c:467
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook mm/slab.h:519 [inline]
 slab_alloc_node mm/slub.c:2959 [inline]
 slab_alloc mm/slub.c:2967 [inline]
 kmem_cache_alloc+0x285/0x4a0 mm/slub.c:2972
 getname_kernel+0x48/0x330 fs/namei.c:226
 kern_path_locked+0x6f/0x300 fs/namei.c:2558
 handle_remove+0x9a/0x4fa drivers/base/devtmpfs.c:312
 handle drivers/base/devtmpfs.c:382 [inline]
 devtmpfs_work_loop drivers/base/devtmpfs.c:395 [inline]
 devtmpfsd+0x176/0x24e drivers/base/devtmpfs.c:437
 kthread+0x38b/0x460 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Freed by task 22:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360
 ____kasan_slab_free mm/kasan/common.c:366 [inline]
 ____kasan_slab_free mm/kasan/common.c:328 [inline]
 __kasan_slab_free+0xff/0x130 mm/kasan/common.c:374
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1628 [inline]
 slab_free_freelist_hook+0xe3/0x250 mm/slub.c:1653
 slab_free mm/slub.c:3213 [inline]
 kmem_cache_free+0x8a/0x5b0 mm/slub.c:3229
 putname include/linux/err.h:41 [inline]
 filename_parentat fs/namei.c:2547 [inline]
 kern_path_locked+0xa7/0x300 fs/namei.c:2558
 handle_remove+0x9a/0x4fa drivers/base/devtmpfs.c:312
 handle drivers/base/devtmpfs.c:382 [inline]
 devtmpfs_work_loop drivers/base/devtmpfs.c:395 [inline]
 devtmpfsd+0x176/0x24e drivers/base/devtmpfs.c:437
 kthread+0x38b/0x460 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

The buggy address belongs to the object at ffff888075825500
 which belongs to the cache names_cache of size 4096
The buggy address is located 32 bytes inside of
 4096-byte region [ffff888075825500, ffff888075826500)
The buggy address belongs to the page:
page:ffffea0001d60800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x75820
head:ffffea0001d60800 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff8880105cb3c0
raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4808, ts 150388224828, free_ts 150033993203
 prep_new_page mm/page_alloc.c:2436 [inline]
 get_page_from_freelist+0xa6f/0x2f50 mm/page_alloc.c:4168
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5390
 alloc_slab_page mm/slub.c:1691 [inline]
 allocate_slab+0x32e/0x4b0 mm/slub.c:1831
 new_slab mm/slub.c:1894 [inline]
 new_slab_objects mm/slub.c:2640 [inline]
 ___slab_alloc+0x473/0x7b0 mm/slub.c:2803
 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2843
 slab_alloc_node mm/slub.c:2925 [inline]
 slab_alloc mm/slub.c:2967 [inline]
 kmem_cache_alloc+0x3e1/0x4a0 mm/slub.c:2972
 getname_flags.part.0+0x4a/0x440 fs/namei.c:138
 getname_flags include/linux/audit.h:319 [inline]
 getname fs/namei.c:217 [inline]
 __do_sys_unlink fs/namei.c:4217 [inline]
 __se_sys_unlink fs/namei.c:4215 [inline]
 __x64_sys_unlink+0x93/0xe0 fs/namei.c:4215
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1346 [inline]
 free_pcp_prepare+0x2c5/0x780 mm/page_alloc.c:1397
 free_unref_page_prepare mm/page_alloc.c:3332 [inline]
 free_unref_page+0x19/0x690 mm/page_alloc.c:3411
 unfreeze_partials+0x16c/0x1b0 mm/slub.c:2421
 put_cpu_partial+0x13d/0x230 mm/slub.c:2457
 qlink_free mm/kasan/quarantine.c:146 [inline]
 qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
 __kasan_slab_alloc+0x95/0xb0 mm/kasan/common.c:444
 kasan_slab_alloc include/linux/kasan.h:254 [inline]
 slab_post_alloc_hook mm/slab.h:519 [inline]
 slab_alloc_node mm/slub.c:2959 [inline]
 slab_alloc mm/slub.c:2967 [inline]
 __kmalloc+0x1f4/0x330 mm/slub.c:4111
 kmalloc_array include/linux/slab.h:631 [inline]
 kcalloc include/linux/slab.h:660 [inline]
 ext4_find_extent+0x7de/0xc70 fs/ext4/extents.c:865
 ext4_ext_map_blocks+0x19c/0x4f20 fs/ext4/extents.c:4066
 ext4_map_blocks+0x559/0x1280 fs/ext4/inode.c:637
 ext4_convert_unwritten_extents+0x287/0x450 fs/ext4/extents.c:4773
 ext4_convert_unwritten_io_end_vec+0xf8/0x200 fs/ext4/extents.c:4812
 ext4_end_io_end fs/ext4/page-io.c:184 [inline]
 ext4_do_flush_completed_IO fs/ext4/page-io.c:257 [inline]
 ext4_end_io_rsv_work+0x260/0x5a0 fs/ext4/page-io.c:271
 process_one_work+0x87f/0x1450 kernel/workqueue.c:2297
 worker_thread+0x598/0x1040 kernel/workqueue.c:2444

Memory state around the buggy address:
 ffff888075825400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888075825480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888075825500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                               ^
 ffff888075825580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888075825600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================