ci starts bisection 2026-06-16 21:17:42.47398954 +0000 UTC m=+17604.418681675
bisecting fixing commit since f5459048c38a00fc583658d6dcd0f894aff6df8f
building syzkaller on 38c8e24669882aabb2ec15315fbe22eb28592b44
ensuring issue is reproducible on original commit f5459048c38a00fc583658d6dcd0f894aff6df8f

testing commit f5459048c38a00fc583658d6dcd0f894aff6df8f gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 7ad05f4f43c69488bacf19e48d1c3aa4ef6437a173c1669c2b5f10eafc215f43
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 [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed
testing commit f5459048c38a00fc583658d6dcd0f894aff6df8f gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 884f80978a53413e3029d02cb378df99b66be453ea81cc004d38e204392394f5
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 [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
kconfig minimization: base=4144 full=8611 leaves diff=2174
split chunks (needed=false): <2174>
split chunk #0 of len 2174 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 f5459048c38a00fc583658d6dcd0f894aff6df8f gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: fc58a29c8d41f9967d4fa0e617c88b0d1e2706f358429df0ded0f31d0e846d48
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 f5459048c38a00fc583658d6dcd0f894aff6df8f gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: fa51679a6557720116968145788e360d39c2a7eb7bca976b6d4deef72114c86f
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 f5459048c38a00fc583658d6dcd0f894aff6df8f gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 255dd3e769c30859319dd0c154b4d8d5b6910a9da7cf09970eb83a35f8880100
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 f5459048c38a00fc583658d6dcd0f894aff6df8f gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 5c8ca1ccf74fe56a308e621ef265b1dcee44a7be61fe8492d87ca0f12e73208a
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 [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit f5459048c38a00fc583658d6dcd0f894aff6df8f gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 45b1637402ec605c0af780b1fd4df51e48f54b6cbf6a1380f4a1aa240314aab7
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 6b5a2b7d9bc156e505f09e698d85d6a1547c1206
testing commit 6b5a2b7d9bc156e505f09e698d85d6a1547c1206 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 0c4b6ed944d4af4fabce4e336d4969401a799c629ca29833a4fcddd2f853eb32
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: 3h7m7.303658861s (build: 2h0m26.595854576s, test: 29m21.978448132s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'trace-tools-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
crash: lost connection to test machine