ci2 starts bisection 2025-02-18 02:31:20.399944221 +0000 UTC m=+19879.870615354
bisecting fixing commit since 563edd786f0a115e983594efe6b0ae26fb7678fa
building syzkaller on d3ccff6372e07c6aabd02b5da419aa6492b5f0ad
ensuring issue is reproducible on original commit 563edd786f0a115e983594efe6b0ae26fb7678fa

testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 59134aab450937ad38e9dd75e512a38a179593d0aaed7b3178664a2a992037b0
run #0: crashed: kernel BUG in submit_bh_wbc
run #1: crashed: kernel BUG in submit_bh_wbc
run #2: crashed: kernel BUG in submit_bh_wbc
run #3: crashed: kernel BUG in submit_bh_wbc
run #4: crashed: kernel BUG in submit_bh_wbc
run #5: crashed: kernel BUG in submit_bh_wbc
run #6: crashed: kernel BUG in submit_bh_wbc
run #7: crashed: kernel BUG in submit_bh_wbc
run #8: crashed: kernel BUG in submit_bh_wbc
run #9: crashed: kernel BUG in submit_bh_wbc
run #10: crashed: kernel BUG in submit_bh_wbc
run #11: crashed: kernel BUG in submit_bh_wbc
run #12: crashed: kernel BUG in submit_bh_wbc
run #13: crashed: kernel BUG in submit_bh_wbc
run #14: crashed: kernel BUG in submit_bh_wbc
run #15: crashed: kernel BUG in submit_bh_wbc
run #16: crashed: kernel BUG in submit_bh_wbc
run #17: crashed: kernel BUG in submit_bh_wbc
run #18: crashed: kernel BUG in submit_bh_wbc
run #19: OK
representative crash: kernel BUG in submit_bh_wbc, types: [BUG]
check whether we can drop unnecessary instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 8d1cd588250e62d02aeb0ab9eb1ada6dd0ec33786684d0f249f66c1c8a2dfd2f
run #0: crashed: kernel BUG in submit_bh_wbc
run #1: crashed: kernel BUG in submit_bh_wbc
run #2: crashed: kernel BUG in submit_bh_wbc
run #3: crashed: kernel BUG in submit_bh_wbc
run #4: crashed: kernel BUG in submit_bh_wbc
run #5: crashed: kernel BUG in submit_bh_wbc
run #6: crashed: kernel BUG in submit_bh_wbc
run #7: crashed: kernel BUG in submit_bh_wbc
run #8: crashed: kernel BUG in submit_bh_wbc
run #9: OK
representative crash: kernel BUG in submit_bh_wbc, types: [BUG]
the bug reproduces without the instrumentation
disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed
kconfig minimization: base=3823 full=7500 leaves diff=2069
split chunks (needed=false): <2069>
split chunk #0 of len 2069 into 5 parts
testing without sub-chunk 1/5
disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 17f45973b47bdb71e94cabe6858a632d577cab1e2ae867d8d41c01a5177a68c8
run #0: crashed: kernel BUG in submit_bh_wbc
run #1: crashed: kernel BUG in submit_bh_wbc
run #2: crashed: kernel BUG in submit_bh_wbc
run #3: crashed: kernel BUG in submit_bh_wbc
run #4: crashed: kernel BUG in submit_bh_wbc
run #5: crashed: kernel BUG in submit_bh_wbc
run #6: crashed: kernel BUG in submit_bh_wbc
run #7: crashed: kernel BUG in submit_bh_wbc
run #8: OK
run #9: OK
representative crash: kernel BUG in submit_bh_wbc, types: [BUG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed
testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 0ac0a5c3d29a87c430b4c36f55a2533bf860f9e332e06558c48e81dd99deab33
run #0: crashed: kernel BUG in submit_bh_wbc
run #1: crashed: kernel BUG in submit_bh_wbc
run #2: crashed: kernel BUG in submit_bh_wbc
run #3: crashed: kernel BUG in submit_bh_wbc
run #4: crashed: kernel BUG in submit_bh_wbc
run #5: crashed: kernel BUG in submit_bh_wbc
run #6: crashed: kernel BUG in submit_bh_wbc
run #7: crashed: kernel BUG in submit_bh_wbc
run #8: ignore: lost connection to test machine
run #9: crashed: kernel BUG in submit_bh_wbc
representative crash: kernel BUG in submit_bh_wbc, types: [BUG]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 6779ddb01e4feafe01374909ecd208e07e908d379f2275eb3a2c001c4013916b
run #0: crashed: kernel BUG in submit_bh_wbc
run #1: crashed: kernel BUG in submit_bh_wbc
run #2: crashed: kernel BUG in submit_bh_wbc
run #3: crashed: kernel BUG in submit_bh_wbc
run #4: crashed: kernel BUG in submit_bh_wbc
run #5: crashed: kernel BUG in submit_bh_wbc
run #6: crashed: kernel BUG in submit_bh_wbc
run #7: crashed: kernel BUG in submit_bh_wbc
run #8: crashed: kernel BUG in submit_bh_wbc
run #9: OK
representative crash: kernel BUG in submit_bh_wbc, types: [BUG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed
testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 19362d722b72527e143357a8666beadc0510cb545d5a5a9f92503b297d0fd07a
run #0: crashed: kernel BUG in submit_bh_wbc
run #1: crashed: kernel BUG in submit_bh_wbc
run #2: crashed: kernel BUG in submit_bh_wbc
run #3: crashed: kernel BUG in submit_bh_wbc
run #4: crashed: no output from test machine
run #5: crashed: kernel BUG in submit_bh_wbc
run #6: crashed: kernel BUG in submit_bh_wbc
run #7: crashed: kernel BUG in submit_bh_wbc
run #8: crashed: kernel BUG in submit_bh_wbc
run #9: OK
representative crash: kernel BUG in submit_bh_wbc, types: [BUG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
testing commit 563edd786f0a115e983594efe6b0ae26fb7678fa gcc
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 6a57fd3367abd9cff3da191514899353bf7b30b8ebcc77a69c3d9d84af190d49
all runs: crashed: kernel BUG in submit_bh_wbc
representative crash: kernel BUG in submit_bh_wbc, types: [BUG]
the chunk can be dropped
disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
determining the merge base between 563edd786f0a115e983594efe6b0ae26fb7678fa and 2408a807bfc3f738850ef5ad5e3fd59d66168996
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: 4066f79bcd9526bb95be081a194b25157c49e1246794a4b64ff5ad5220b6cfcc
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: 3h3m48.274872787s (build: 1h31m40.6328877s, test: 1h28m24.050135319s)
crash still not fixed or there were kernel test errors
commit msg: Linux 6.1