ci starts bisection 2026-06-29 22:16:57.301026434 +0000 UTC m=+39422.117244795
bisecting fixing commit since a5c93bfec0beca4435d1995bc3ff2ac003fe7552
building syzkaller on 7d02db5adbb376babbbd3199f8c530e468292727
ensuring issue is reproducible on original commit a5c93bfec0beca4435d1995bc3ff2ac003fe7552

testing commit a5c93bfec0beca4435d1995bc3ff2ac003fe7552 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 4bb16e71a7f18140282537d43df2a8a5cc97606e8d6105fa32fed89c90e9ec89
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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit a5c93bfec0beca4435d1995bc3ff2ac003fe7552 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: f73bf8cf6d2d400001facdbfad6d1b769a571a19c1307c28064b1e2eab2e3e9c
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 [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
kconfig minimization: base=4140 full=8201 leaves diff=2187
split chunks (needed=false): <2187>
split chunk #0 of len 2187 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 a5c93bfec0beca4435d1995bc3ff2ac003fe7552 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 10f470badc713669326442624d7dd9a301b2875509a19c9f5834fab53b5253d6
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 a5c93bfec0beca4435d1995bc3ff2ac003fe7552 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 74ee73e32ac84b09cb26b562661fe1b529b9a323395138e20c6d95fc527ba64d
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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit a5c93bfec0beca4435d1995bc3ff2ac003fe7552 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 87a574aee2c4ea2b685c9b7d10c4f99130e16c1848646bcac630a539fcbef026
run #0: basic kernel testing failed: failed to copy prog to VM: scp failed: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-v" "-O" "/tmp/syzkaller1542542545" "root@10.128.1.7:ci-upstream-kasan-gce-selinux-root-bisect-job/syzkaller1542542545"]: exit status 1
run #1: crashed: lost connection to test machine
run #2: crashed: lost connection to test machine
run #3: crashed: lost connection to test machine
run #4: basic kernel testing failed: lost connection to test machine
run #5: crashed: lost connection to test machine
run #6: basic kernel testing failed: lost connection to test machine
run #7: basic kernel testing failed: lost connection to test machine
run #8: basic kernel testing failed: lost connection to test machine
run #9: 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 a5c93bfec0beca4435d1995bc3ff2ac003fe7552 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 9a5157621a2524b86f25961f42aed34f4f556117c56486777794cec6fa11d0eb
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 a5c93bfec0beca4435d1995bc3ff2ac003fe7552 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: a09a475601bd3b0549fe8e9ded790e44c0d4b4d0bdd2864a8d1a0c4d3d575943
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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing current HEAD dc59e4fea9d83f03bad6bddf3fa2e52491777482
testing commit dc59e4fea9d83f03bad6bddf3fa2e52491777482 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 1f8c16f8cc16584aa81ab3923cd328b991bd6560a86aae6db9e0ca853bbf50d1
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: 2h27m36.94033462s (build: 57m46.349634332s, test: 28m44.810486307s)
crash still not fixed or there were kernel test errors
commit msg: Linux 7.2-rc1
crash: lost connection to test machine