ci starts bisection 2026-07-12 06:39:50.711919192 +0000 UTC m=+103765.496724830
bisecting fixing commit since c8993263ffd3831c96f258ca76e59303122a47bb
building syzkaller on a15a64a66dd37b7f9c31f5c3efb1524bb9863162
ensuring issue is reproducible on original commit c8993263ffd3831c96f258ca76e59303122a47bb

testing commit c8993263ffd3831c96f258ca76e59303122a47bb gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 39de60377f1861720b19e2c1f8c4d11c51ac13d8c52fd96c9d3825492900aa62
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 c8993263ffd3831c96f258ca76e59303122a47bb gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 7039a47dfa3a98659d07b1f6d1729451048ee2bfa214a27cf8a55cc17cf23f34
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 [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
kconfig minimization: base=4147 full=8589 leaves diff=2148
split chunks (needed=false): <2148>
split chunk #0 of len 2148 into 5 parts
testing without sub-chunk 1/5
disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit c8993263ffd3831c96f258ca76e59303122a47bb gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 54c15af9fc68a27a70afc1c7f25eae5a3ae83bc6a1ddcc447fc89be465aec844
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 [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit c8993263ffd3831c96f258ca76e59303122a47bb gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: af41e85a0bb210c56b9c6d48b993e3d8257e48dffedf544b184afd5cf169ed1a
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 [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit c8993263ffd3831c96f258ca76e59303122a47bb gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: e761c9c97a4b6de046b1c530d71ad800a63907ed3e3a7c1ba44e0df3d3bfa4e5
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 [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit c8993263ffd3831c96f258ca76e59303122a47bb gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: ab7f0f68b27b69d782a18f0c856511edfab133e3ccdbf083ef5da31859b55e3a
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 [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit c8993263ffd3831c96f258ca76e59303122a47bb gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 981bf506d3bf21b05e5b64548a9813eff409c0e07d12ccbfb96e828f931a9008
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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
testing current HEAD 9a3a07d06e7d74f4aecc51396c771149336ac55d
testing commit 9a3a07d06e7d74f4aecc51396c771149336ac55d gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 357c25c33af01f1459cb7f4fb852254c1bd232fcd4730fda06c421f5a5f592db
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: 3h59m12.217345716s (build: 2h37m16.72783879s, test: 31m9.802974066s)
crash still not fixed or there were kernel test errors
commit msg: Merge branch 'bpf-fix-warning-in-bpf_trampoline_multi_detach'
crash: lost connection to test machine