ci2 starts bisection 2026-07-13 21:22:06.478044969 +0000 UTC m=+35313.216328926
bisecting fixing commit since 37816488247ddddbc3de113c78c83572274b1e2e
building syzkaller on 32a0e5edfeef60e894c453dc9e9ae45528626ef1
ensuring issue is reproducible on original commit 37816488247ddddbc3de113c78c83572274b1e2e

testing commit 37816488247ddddbc3de113c78c83572274b1e2e gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: b953eddb17bb8de1ddecd1a1fadaf74f5eee8031320b937ad26e6010c1de4c9e
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 37816488247ddddbc3de113c78c83572274b1e2e gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: d77c8dc690cce5c65a1d08584bb31a6cef71181612d00cbab319fb4d27ffdd51
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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
kconfig minimization: base=4140 full=8349 leaves diff=2207
split chunks (needed=false): <2207>
split chunk #0 of len 2207 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 37816488247ddddbc3de113c78c83572274b1e2e gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: c2c557047e7327f7e495ca5c1392097736b99b7f79cd704487101e2550a5164f
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 37816488247ddddbc3de113c78c83572274b1e2e gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 2236579824960df602260f68ab258908ef09fe2c9b76b29d2e807f64f5495349
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 37816488247ddddbc3de113c78c83572274b1e2e gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 9af5619aee7ff3f467379fe4b094ca87d1661cd6e77dd6b24a2bc74798cb7936
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 37816488247ddddbc3de113c78c83572274b1e2e gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: a6df1a4ee188e03fc90ddd0d0247c3192b1c93e164879a74e3186c768dfb0108
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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit 37816488247ddddbc3de113c78c83572274b1e2e gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 10056731dfbb6967ceaaf4f0fa307c71efd34a8b56fa1db66d1e14836b77d7d8
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 [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing current HEAD 0f26556c5eeea62cc934fa8938b148aa5844a6b6
testing commit 0f26556c5eeea62cc934fa8938b148aa5844a6b6 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 1f903e1e1d43da5068fb80994ef427768c4515e9146264691022709f5b57be30
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: 2h18m8.891967614s (build: 1h6m39.532759811s, test: 44m39.329543686s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'nfsd-7.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
crash: lost connection to test machine