ci2 starts bisection 2026-07-14 10:08:10.860878397 +0000 UTC m=+37350.467902208
bisecting fixing commit since 5862221fddede6bb15566ab3c1f23a3c353da5e1
building syzkaller on f250db59430dfb0102692e53ab92e84e82178c3e
ensuring issue is reproducible on original commit 5862221fddede6bb15566ab3c1f23a3c353da5e1

testing commit 5862221fddede6bb15566ab3c1f23a3c353da5e1 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 960c8e1e5b425862e4eececa232c0f3326491c8c782bd3594fb446212857deb3
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 [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit 5862221fddede6bb15566ab3c1f23a3c353da5e1 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: f7112b0110c5a80cfe503916e34f8ecc5cbabba2e1e75f0d143d61c1a78b29bc
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=4140 full=8382 leaves diff=2107
split chunks (needed=false): <2107>
split chunk #0 of len 2107 into 5 parts
testing without sub-chunk 1/5
disabling configs for [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
testing commit 5862221fddede6bb15566ab3c1f23a3c353da5e1 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: eb40773fb409ab23ed89a83ca0f0356b44b32a2dfaf900786ab5d5fc20a4aa90
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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 5862221fddede6bb15566ab3c1f23a3c353da5e1 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 3df38b354cd8b95723ea7b8774e2a1550e15127dfdebd7c08fb21fcb10572f5e
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 5862221fddede6bb15566ab3c1f23a3c353da5e1 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: d72d0b0e6f0ba8f37267664dda6fb93f3170f06423232e45c38935a3abfaae71
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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit 5862221fddede6bb15566ab3c1f23a3c353da5e1 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 378e42c0902ffb1409c10249d0d6e64d52cdea9b23d1cb8b5dfa8e1e4b12b422
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 5862221fddede6bb15566ab3c1f23a3c353da5e1 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: b5f2971831ce87f088a853f292e3dace4a2b1486bcdc611d56b7d746b888ad19
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 [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed
testing current HEAD 3b029c035b34bbc693405ddf759f0e9b920c27f1
testing commit 3b029c035b34bbc693405ddf759f0e9b920c27f1 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 4e334788afbd9f39b0588be47b2436f65c47dc06e16bcfcc4d78a7edb5a255a3
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: 1h35m39.931132511s (build: 38m40.285047216s, test: 32m58.972599449s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'cgroup-for-7.2-rc3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
crash: lost connection to test machine