ci starts bisection 2026-07-15 19:18:11.117708968 +0000 UTC m=+38818.733095178
bisecting fixing commit since 5597dd284ff8c556c0b00f6a34473677426e3f81
building syzkaller on 74a13a23df638267bd5cda3965212e551bcf3eb5
ensuring issue is reproducible on original commit 5597dd284ff8c556c0b00f6a34473677426e3f81

testing commit 5597dd284ff8c556c0b00f6a34473677426e3f81 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 1e9fdf8dbad0513af19f1d777e4aad1e0ed36a9fd252c1771614588d78ec5f15
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 5597dd284ff8c556c0b00f6a34473677426e3f81 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: bcc7b4c0fcd8410cfc66ba97d871d0491c20917ae1d9b5f6d0d73293a8b93dc6
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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
kconfig minimization: base=4147 full=8611 leaves diff=2175
split chunks (needed=false): <2175>
split chunk #0 of len 2175 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 5597dd284ff8c556c0b00f6a34473677426e3f81 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 5ac1ae233188b2afd7dff63d26114a0c8bff692ce3b6f5f4f7ea99f69d383b87
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 5597dd284ff8c556c0b00f6a34473677426e3f81 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 01b6d7e316edfff51a639aadb07781c6b81d29832c4772f064ca175cc6fbc93b
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 5597dd284ff8c556c0b00f6a34473677426e3f81 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 1927c0a57d840ec7fb80ef8c1539a60913b172ec83cfce11cdcd7ad7f00742cb
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 [memleak ubsan bug_or_warning kasan locking atomic_sleep hang], they are not needed
testing commit 5597dd284ff8c556c0b00f6a34473677426e3f81 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 8757b120ad038ca936958fe2fe6e97045a8db2dd431975be8a68113be516b5dc
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 5597dd284ff8c556c0b00f6a34473677426e3f81 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 2304d2c265df31056ec847ba6ad5bbbde5df1715fc8a1455347ffa4464d58f69
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 3f1f755366687d051174739fb99f7d560202f60b
testing commit 3f1f755366687d051174739fb99f7d560202f60b gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 56e6466efae0af862e3b1be842e2ceacbef81c5d4e8221f8f78deed1d447ce06
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: 2h33m53.468247956s (build: 1h25m27.839378363s, test: 36m44.332667229s)
crash still not fixed or there were kernel test errors
commit msg: net: openvswitch: reject oversized nested action attrs
crash: lost connection to test machine