ci2 starts bisection 2024-03-20 22:23:15.417045113 +0000 UTC m=+27167.680770803
bisecting fixing commit since 458ce51d0356ee60c93f9f807d9827cf2a41643d
building syzkaller on 352ab9047be19ed1d8367b9113b7bde280c90124
ensuring issue is reproducible on original commit 458ce51d0356ee60c93f9f807d9827cf2a41643d

testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: eda0978899ce418bcfe31aacd49b456c6f3d405ac05fc4394d6a4b62b4c2d06e
all runs: crashed: INFO: task hung in unix_dgram_sendmsg
representative crash: INFO: task hung in unix_dgram_sendmsg, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 67184c784ad65ef0a3759a630f89d87f7b2abfb2e95efee0d9e169e1fd31f680
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 [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
kconfig minimization: base=3703 full=7265 leaves diff=1981
split chunks (needed=false): <1981>
split chunk #0 of len 1981 into 5 parts
testing without sub-chunk 1/5
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 7ed8aecd02cd6c37c00759998753d281046e6b8121730d8a73f5b5edd88fb279
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_stream_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_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
representative crash: INFO: task hung in unix_dgram_sendmsg, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 3c3b06c88f9bd9484a428ea2b261642485846d0676c31a2b1d1c35a560318a81
all runs: crashed: INFO: task hung in unix_dgram_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 [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 9a297adc294a0c8dd9da5a32532c8739acb9539b48b183881145a15951b2aa10
all runs: crashed: INFO: task hung in unix_dgram_sendmsg
representative crash: INFO: task hung in unix_dgram_sendmsg, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 46f8cf9d41f0cb0b722ba635c35340562a86bde8fd3f28f0f7a93a53edd7ed10
all runs: crashed: INFO: rcu detected stall in unix_release
representative crash: INFO: rcu detected stall in unix_release, 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 458ce51d0356ee60c93f9f807d9827cf2a41643d gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4737f97e17473eb57c7a9014f8940997b96d4214816587b8608d51dbb42f0ce5
all runs: crashed: INFO: rcu detected stall in unix_release
representative crash: INFO: rcu detected stall in unix_release, 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 458ce51d0356ee60c93f9f807d9827cf2a41643d and a4145ce1e7bc247fd6f2846e8699473448717b37
8bb7eca972ad531c9b149c0a51ab43a417385813/Linux 5.15 is a merge base, check if it has the bug
testing commit 8bb7eca972ad531c9b149c0a51ab43a417385813 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 4b4041fbe518dbe91a3c1698aebca3e9744dbe1a8b24007d73dab925f6887a9e
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: 1h45m53.328079042s (build: 55m47.387029421s, test: 47m55.229713386s)
crash still not fixed or there were kernel test errors
commit msg: Linux 5.15