ci starts bisection 2025-08-06 11:27:12.910258132 +0000 UTC m=+67.794983682
bisecting cause commit starting from 347e9f5043c89695b01e66b3ed111755afcf1911
building syzkaller on 03fcfc4b7385b545a89a3fc62bef4e1ec7532e0d
ensuring issue is reproducible on original commit 347e9f5043c89695b01e66b3ed111755afcf1911

testing commit 347e9f5043c89695b01e66b3ed111755afcf1911 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 34c77ed0930260f6de02873610bfb011dda6dc9329aec4e5b61be9910bfde08d
all runs: crashed: INFO: task hung in blk_trace_setup
representative crash: INFO: task hung in blk_trace_setup, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep memleak], they are not needed
testing commit 347e9f5043c89695b01e66b3ed111755afcf1911 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: ce58f5f7ab5d373b87150993120b6a33818721c8300c1ee8e56751c282b6e4dd
all runs: OK
false negative chance: 0.000
kconfig minimization: base=4095 full=8481 leaves diff=2188
split chunks (needed=false): <2188>
split chunk #0 of len 2188 into 5 parts
testing without sub-chunk 1/5
testing commit 347e9f5043c89695b01e66b3ed111755afcf1911 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: ab9f9e4b17007883e7f573b5bc6e53f7f01d9a620e5fefbbc7fb562fe1445176
all runs: crashed: INFO: task hung in blk_trace_setup
representative crash: INFO: task hung in blk_trace_setup, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
testing commit 347e9f5043c89695b01e66b3ed111755afcf1911 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 7c71d9ed7ac5b0894e22a6bfbb3070f87e1e3f90915db8ef725b57754dc7a2bb
run #0: crashed: INFO: task hung in blk_trace_setup
run #1: crashed: INFO: task hung in blk_trace_setup
run #2: crashed: INFO: task hung in blk_trace_setup
run #3: crashed: INFO: task hung in blk_trace_setup
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
representative crash: INFO: task hung in blk_trace_setup, types: [HANG]
the chunk can be dropped
testing without sub-chunk 3/5
testing commit 347e9f5043c89695b01e66b3ed111755afcf1911 gcc
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
kernel signature: 6a0ce376246e396329c6b1cde65876e3abe3a78bf4ffc5dc85b66e18311309e8
repro testing failure: failed to create VM pool: failed to create GCE image: failed to get create image operation operation-1754500182516-63bb568232157-c04291ae-96684a12: googleapi: Error 503: Authentication backend unavailable., backendError
reproducer is flaky (1.00 repro chance estimate)
revisions tested: 5, total time: 5h43m43.448714561s (build: 1h12m46.518591718s, test: 37m6.334267128s)
error: config minimization failed: repro testing failure: failed to create VM pool: failed to create GCE image: failed to get create image operation operation-1754500182516-63bb568232157-c04291ae-96684a12: googleapi: Error 503: Authentication backend unavailable., backendError