ci2 starts bisection 2024-03-21 09:55:34.872240826 +0000 UTC m=+18506.386805576
bisecting fixing commit since a3eb3a74aa8c94e6c8130b55f3b031f29162868c
building syzkaller on 25905f5d0a2a7883bd33491997556193582c6059
ensuring issue is reproducible on original commit a3eb3a74aa8c94e6c8130b55f3b031f29162868c

testing commit a3eb3a74aa8c94e6c8130b55f3b031f29162868c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 185836dac4d731549092169b67af7782f01aa96caa279f1034bc6a213fc7d941
run #0: crashed: INFO: task hung in unix_dgram_sendmsg
run #1: crashed: INFO: task hung in unix_dgram_sendmsg
run #2: crashed: INFO: task hung in unix_dgram_sendmsg
run #3: crashed: INFO: task hung in unix_dgram_sendmsg
run #4: crashed: INFO: task hung in unix_dgram_sendmsg
run #5: crashed: INFO: task hung in unix_dgram_sendmsg
run #6: crashed: INFO: task hung in unix_dgram_sendmsg
run #7: crashed: INFO: task hung in unix_dgram_sendmsg
run #8: crashed: INFO: task hung in unix_dgram_sendmsg
run #9: crashed: INFO: task hung in unix_dgram_sendmsg
run #10: crashed: INFO: task hung in unix_dgram_sendmsg
run #11: crashed: INFO: task hung in unix_dgram_sendmsg
run #12: crashed: INFO: task hung in unix_dgram_sendmsg
run #13: crashed: INFO: task hung in unix_dgram_sendmsg
run #14: crashed: INFO: task hung in unix_dgram_sendmsg
run #15: crashed: INFO: task hung in unix_dgram_sendmsg
run #16: crashed: INFO: task hung in unix_dgram_sendmsg
run #17: crashed: INFO: task hung in unix_dgram_sendmsg
run #18: crashed: INFO: task hung in unix_dgram_sendmsg
run #19: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor4008817255" "root@10.128.1.184:./syz-executor4008817255"]: exit status 255
Executing: program /usr/bin/ssh host 10.128.1.184, user root, command sftp
OpenSSH_9.2p1 Debian-2+deb12u1, OpenSSL 3.0.11 19 Sep 2023
debug1: Reading configuration data /dev/null
debug1: Connecting to 10.128.1.184 [10.128.1.184] port 22.
debug1: fd 3 clearing O_NONBLOCK
debug1: Connection established.
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa_sk type -1
debug1: identity file /root/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /root/.ssh/id_ed25519 type -1
debug1: identity file /root/.ssh/id_ed25519-cert type -1
debug1: identity file /root/.ssh/id_ed25519_sk type -1
debug1: identity file /root/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /root/.ssh/id_xmss type -1
debug1: identity file /root/.ssh/id_xmss-cert type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_9.2p1 Debian-2+deb12u1
Connection timed out during banner exchange
Connection to 10.128.1.184 port 22 timed out
scp: Connection closed

representative crash: INFO: task hung in unix_dgram_sendmsg, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit a3eb3a74aa8c94e6c8130b55f3b031f29162868c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: a1fd99dbaa206f88ed61cb81e9c6d619bf95d8791c5474b0005ff03265a2e94a
all runs: crashed: INFO: task hung in unix_dgram_sendmsg
representative crash: INFO: task hung in unix_dgram_sendmsg, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
kconfig minimization: base=3820 full=7452 leaves diff=1987
split chunks (needed=false): <1987>
split chunk #0 of len 1987 into 5 parts
testing without sub-chunk 1/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit a3eb3a74aa8c94e6c8130b55f3b031f29162868c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 0896ceb1d5187550d05745a648966713dd9f4248f089ea25dbfa70fe3b4cd84e
run #0: crashed: INFO: task hung in unix_stream_sendmsg
run #1: crashed: INFO: task hung in unix_dgram_sendmsg
run #2: crashed: INFO: task hung in unix_dgram_sendmsg
run #3: crashed: INFO: task hung in unix_dgram_sendmsg
run #4: crashed: INFO: task hung in unix_stream_sendmsg
run #5: crashed: INFO: task hung in unix_stream_sendmsg
run #6: crashed: INFO: task hung in unix_stream_sendmsg
run #7: crashed: INFO: task hung in unix_dgram_sendmsg
run #8: crashed: INFO: task hung in unix_dgram_sendmsg
run #9: crashed: INFO: task hung in unix_dgram_sendmsg
representative crash: INFO: task hung in unix_stream_sendmsg, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit a3eb3a74aa8c94e6c8130b55f3b031f29162868c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: b9f629f626033d2e244511699c32d7fb554cdb80c9557e89c9597edd7d5d81f4
run #0: crashed: INFO: task hung in unix_dgram_sendmsg
run #1: crashed: INFO: task hung in unix_dgram_sendmsg
run #2: crashed: INFO: task hung in unix_dgram_sendmsg
run #3: crashed: INFO: task hung in unix_dgram_sendmsg
run #4: crashed: INFO: task hung in unix_stream_sendmsg
run #5: crashed: INFO: task hung in unix_stream_sendmsg
run #6: crashed: INFO: task hung in unix_dgram_sendmsg
run #7: crashed: INFO: task hung in unix_dgram_sendmsg
run #8: crashed: INFO: task hung in unix_dgram_sendmsg
run #9: crashed: INFO: task hung in unix_stream_sendmsg
representative crash: INFO: task hung in unix_dgram_sendmsg, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit a3eb3a74aa8c94e6c8130b55f3b031f29162868c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 33dea841f8e509b4ae1d39abead7853b1a27588ea688b08434f336100b746917
run #0: crashed: INFO: task hung in unix_stream_sendmsg
run #1: crashed: INFO: task hung in unix_stream_sendmsg
run #2: crashed: INFO: task hung in unix_stream_sendmsg
run #3: crashed: INFO: task hung in unix_stream_sendmsg
run #4: crashed: INFO: task hung in unix_stream_sendmsg
run #5: crashed: INFO: task hung in unix_stream_sendmsg
run #6: crashed: INFO: task hung in unix_stream_sendmsg
run #7: crashed: INFO: task hung in unix_stream_sendmsg
run #8: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor817902172" "root@10.128.0.188:./syz-executor817902172"]: exit status 255
Executing: program /usr/bin/ssh host 10.128.0.188, user root, command sftp
OpenSSH_9.2p1 Debian-2+deb12u1, OpenSSL 3.0.11 19 Sep 2023
debug1: Reading configuration data /dev/null
debug1: Connecting to 10.128.0.188 [10.128.0.188] port 22.
debug1: fd 3 clearing O_NONBLOCK
debug1: Connection established.
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa_sk type -1
debug1: identity file /root/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /root/.ssh/id_ed25519 type -1
debug1: identity file /root/.ssh/id_ed25519-cert type -1
debug1: identity file /root/.ssh/id_ed25519_sk type -1
debug1: identity file /root/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /root/.ssh/id_xmss type -1
debug1: identity file /root/.ssh/id_xmss-cert type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_9.2p1 Debian-2+deb12u1
Connection timed out during banner exchange
Connection to 10.128.0.188 port 22 timed out
scp: Connection closed

run #9: OK
representative crash: INFO: task hung in unix_stream_sendmsg, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit a3eb3a74aa8c94e6c8130b55f3b031f29162868c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 9af745897f97c541de86c465cdc50b73fa0a3ab095c538a1400adf6073bd44ec
run #0: crashed: INFO: rcu detected stall in corrupted
run #1: crashed: INFO: rcu detected stall in corrupted
run #2: crashed: INFO: rcu detected stall in corrupted
run #3: crashed: INFO: rcu detected stall in corrupted
run #4: crashed: INFO: rcu detected stall in corrupted
run #5: crashed: INFO: rcu detected stall in corrupted
run #6: crashed: INFO: rcu detected stall in corrupted
run #7: crashed: INFO: rcu detected stall in corrupted
run #8: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor19296360" "root@10.128.0.234:./syz-executor19296360"]: exit status 255
Executing: program /usr/bin/ssh host 10.128.0.234, user root, command sftp
OpenSSH_9.2p1 Debian-2+deb12u1, OpenSSL 3.0.11 19 Sep 2023
debug1: Reading configuration data /dev/null
debug1: Connecting to 10.128.0.234 [10.128.0.234] port 22.
debug1: connect to address 10.128.0.234 port 22: Connection timed out
ssh: connect to host 10.128.0.234 port 22: Connection timed out
scp: Connection closed

run #9: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "/tmp/syz-executor2987465549" "root@10.128.1.22:./syz-executor2987465549"]: exit status 255
Executing: program /usr/bin/ssh host 10.128.1.22, user root, command sftp
OpenSSH_9.2p1 Debian-2+deb12u1, OpenSSL 3.0.11 19 Sep 2023
debug1: Reading configuration data /dev/null
debug1: Connecting to 10.128.1.22 [10.128.1.22] port 22.
debug1: connect to address 10.128.1.22 port 22: Connection timed out
ssh: connect to host 10.128.1.22 port 22: Connection timed out
scp: Connection closed

representative crash: INFO: rcu detected stall in corrupted, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG KASAN], they are not needed
testing commit a3eb3a74aa8c94e6c8130b55f3b031f29162868c gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 81d757545019b0f6806b339aff65b22c84b7824e97e48dbcd4dafdc14477ee5c
all runs: crashed: INFO: rcu detected stall in corrupted
representative crash: INFO: rcu detected stall in corrupted, types: [HANG]
the chunk can be dropped
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
determining the merge base between a3eb3a74aa8c94e6c8130b55f3b031f29162868c and 23956900041d968f9ad0f30db6dede4daccd7aa9
830b3c68c1fb1e9176028d02ef86f3cf76aa2476/Linux 6.1 is a merge base, check if it has the bug
testing commit 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 50b639a6fd082969972bf0aa833d0a42cf0b28972dc917fec7be150ce57943f0
all runs: OK
false negative chance: 0.000
reproducer does not crash the merge base, so there's no known bad commit
revisions tested: 8, total time: 1h53m34.957861599s (build: 31m57.030617979s, test: 1h18m39.398782544s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.1