ci starts bisection 2026-07-11 17:46:06.924847504 +0000 UTC m=+57341.709653145
bisecting fixing commit since bbeb83d3182abe0d245318e274e8531e5dd7a948
building syzkaller on 4367a094e88855b66d18174fe0ea8a9458097998
ensuring issue is reproducible on original commit bbeb83d3182abe0d245318e274e8531e5dd7a948

testing commit bbeb83d3182abe0d245318e274e8531e5dd7a948 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 79ac918c41f3a1999e8d5b95b3f25e204be08a50ce5663988fd20ec3fdd4500e
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 [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit bbeb83d3182abe0d245318e274e8531e5dd7a948 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 6c30292e49f753c449b73143b2ba86ccdc26119c19f042f1e4d07a47e8c58e39
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=8410 leaves diff=2135
split chunks (needed=false): <2135>
split chunk #0 of len 2135 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 bbeb83d3182abe0d245318e274e8531e5dd7a948 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: af956c05c4b29226363d473dfddf6d4828a16458ff93197257695ecd60353027
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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
testing commit bbeb83d3182abe0d245318e274e8531e5dd7a948 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: b9d6d128f99e3fe3f02ff2d282445f38e69cd82ef628a96668b019afffd5a717
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 [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit bbeb83d3182abe0d245318e274e8531e5dd7a948 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: dc0d7f17952b2e6d891a0d67c02b98cbb0c41e44c0306c2576ecfbdedf5bcbe8
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 bbeb83d3182abe0d245318e274e8531e5dd7a948 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 180646c158532715af0c813e0a7d331c5310b3c646b093ce5cc68428c2b2d6d8
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 [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed
testing commit bbeb83d3182abe0d245318e274e8531e5dd7a948 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: fbfd1ffa9728e81ed305c7d785118fa4d2b259cb8311931d6e6ff72ed62ba9fc
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 cab9e339cfbc1a4e075e53e281dfb00391e1a6bb
testing commit cab9e339cfbc1a4e075e53e281dfb00391e1a6bb gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: e624b9ccf1913a557ddf558651c1e63047aba348f6a921ccd9762ca742b76b82
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: 10h33m17.565343339s (build: 6h23m29.086435713s, test: 33m50.504130281s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'perf-urgent-2026-07-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
crash: lost connection to test machine