ci starts bisection 2026-06-29 00:08:30.485720183 +0000 UTC m=+192539.033928695
bisecting fixing commit since d60ec36cab338dfe2ae40d73e9c8d6c4af70d2b8
building syzkaller on 2b01f00eb6f21b4f227c78c2e10ecec55f5e7d76
ensuring issue is reproducible on original commit d60ec36cab338dfe2ae40d73e9c8d6c4af70d2b8

testing commit d60ec36cab338dfe2ae40d73e9c8d6c4af70d2b8 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 55320cc80b7bd3a08c1fa70c04ccc61394a549a736f7b9291bd156242b0037e1
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
check whether we can drop unnecessary instrumentation
disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit d60ec36cab338dfe2ae40d73e9c8d6c4af70d2b8 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: fb572105ab31e68a3ed8eea3ba5e8ee4eb3fb99e0b5ba8740a7e88c0ea7083f8
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the bug reproduces without the instrumentation
disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
kconfig minimization: base=4137 full=8374 leaves diff=2101
split chunks (needed=false): <2101>
split chunk #0 of len 2101 into 5 parts
testing without sub-chunk 1/5
disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit d60ec36cab338dfe2ae40d73e9c8d6c4af70d2b8 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 36fdd2e1ab7f07b56d6c5c5dca9b396edcf65dd90177515253774622d34ee3c1
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed
testing commit d60ec36cab338dfe2ae40d73e9c8d6c4af70d2b8 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 2c6376ac2d8eff16daa8161dd6895c9ab84c1de215c5f5b93434352e2aa2d9ea
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit d60ec36cab338dfe2ae40d73e9c8d6c4af70d2b8 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: ec5e447c6c2d447c5f89b995905c5182d79a5b4439b5f03f6931830c985187aa
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed
testing commit d60ec36cab338dfe2ae40d73e9c8d6c4af70d2b8 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 7e601106279788343d46bb26ee3597b83d93a9e7b5b702e54f5ab46222745928
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
testing commit d60ec36cab338dfe2ae40d73e9c8d6c4af70d2b8 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 36087b322608d2fc3a2e617bf5ffe07328bae62b2d6f03777f63fa39a6bfa79c
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
the chunk can be dropped
disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
testing current HEAD dc59e4fea9d83f03bad6bddf3fa2e52491777482
testing commit dc59e4fea9d83f03bad6bddf3fa2e52491777482 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: a6f65001fb3162e0fd94cb9f8bf155ab695b8c8af7a4cef802e47de7b58683ae
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h34m27.120980664s (build: 1h10m32.58546474s, test: 35m53.102193763s)
crash still not fixed or there were kernel test errors
commit msg: Linux 7.2-rc1
crash: lost connection to test machine