ci starts bisection 2026-06-18 14:26:00.465415528 +0000 UTC m=+14774.827407574
bisecting cause commit starting from b85966adbf5de0668a815c6e3527f87e0c387fb4
building syzkaller on b62b3ded1759f79b37600c5ffe2b0a81b919b0b0
ensuring issue is reproducible on original commit b85966adbf5de0668a815c6e3527f87e0c387fb4

testing commit b85966adbf5de0668a815c6e3527f87e0c387fb4 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: e81ae696c0a1a3e5c0fcf06eb9d6b7e2eee22dcdf0bdabf46bdfa553059bb5d6
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 b85966adbf5de0668a815c6e3527f87e0c387fb4 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 969b71f98ea495995e7cf733d324142452806fd382850527a77b8fe8c2cd5bb4
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=4144 full=8586 leaves diff=2145
split chunks (needed=false): <2145>
split chunk #0 of len 2145 into 5 parts
testing without sub-chunk 1/5
disabling configs for [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit b85966adbf5de0668a815c6e3527f87e0c387fb4 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 3a14a95269dcc00e265c877dba3dbf27bea6438d5022fede6ea8df49aeda3618
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 [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit b85966adbf5de0668a815c6e3527f87e0c387fb4 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 279e94651a036e4390be6da1425e31ce92b019923122cbf09750941abe95d08a
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 b85966adbf5de0668a815c6e3527f87e0c387fb4 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 69e25595d4c5bc0cce989da81cb663fcffb798d65f8e815dc52a4b72f3460d8a
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 [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit b85966adbf5de0668a815c6e3527f87e0c387fb4 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: cfaf3ba1d4d719a135e67dac36fa371d4d7f4af20d0c44eaca274831d4881447
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 b85966adbf5de0668a815c6e3527f87e0c387fb4 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 747c286db75a9a08c69fa2af6124430bc817534a93fab8493a61d5bff0ed66d6
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
picked [v7.1 v7.0 v6.19 v6.17 v6.15 v6.13 v6.11 v6.9 v6.6 v6.3 v6.0 v5.17 v5.14 v5.11 v5.8 v5.5 v5.2 v4.20 v4.19] out of 44 release tags
testing release v7.1
revisions tested: 7, total time: 12h2m35.08656179s (build: 10h52m18.377563155s, test: 27m23.46349071s)
error: bisection is taking too long (>12h0m0s), aborting