ci starts bisection 2026-07-19 21:35:50.479864808 +0000 UTC m=+160951.114007682
bisecting fixing commit since 8c13415c8a4383447c21ec832b20b3b283f0e01a
building syzkaller on d7ffd47b8f76bd5cf05ca432102140d6c277a065
ensuring issue is reproducible on original commit 8c13415c8a4383447c21ec832b20b3b283f0e01a

testing commit 8c13415c8a4383447c21ec832b20b3b283f0e01a gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: e22fead966d49e55c683369a510bb8dd5fc7faa980c71726fcd444c745449d7f
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 [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit 8c13415c8a4383447c21ec832b20b3b283f0e01a gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 0fda13f2d889fa010490d080818280542946d6086161d96d85d887e4498d677a
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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
kconfig minimization: base=4147 full=8597 leaves diff=2146
split chunks (needed=false): <2146>
split chunk #0 of len 2146 into 5 parts
testing without sub-chunk 1/5
disabling configs for [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed
testing commit 8c13415c8a4383447c21ec832b20b3b283f0e01a gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: d047010f6323148d9c422b9afd1de4b85e35b00a2703dfd8a5dd8c512f2fa706
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 [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit 8c13415c8a4383447c21ec832b20b3b283f0e01a gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 2d900441819e130183c7d9dff09d1be84c3ddf8bfb4f506d9ec53edf5b9d5b9c
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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
testing commit 8c13415c8a4383447c21ec832b20b3b283f0e01a gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: fe1bfc239ff27a30e00940fc3138f05f2e382083e043df084de4dd40f4ebe680
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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
testing commit 8c13415c8a4383447c21ec832b20b3b283f0e01a gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: dad8eb7e83409f78f8e183f172755fba90f893541a9c30805a6f129b2e42bb49
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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 8c13415c8a4383447c21ec832b20b3b283f0e01a gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: dbb21c29c35d2fb67d351f2a102ae3bb937b9505125eeead1b2bd848e4cb4ae9
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 [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing current HEAD 1590cf0329716306e948a8fc29f1d3ee87d3989f
testing commit 1590cf0329716306e948a8fc29f1d3ee87d3989f gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: b556bafa4f55851d60efa1409e076eb155e3b949bb62d4596efb840db0a87a00
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: 5h40m10.807801319s (build: 2h36m1.417639116s, test: 31m25.752998439s)
crash still not fixed or there were kernel test errors
commit msg: Linux 7.2-rc4
crash: lost connection to test machine