ci starts bisection 2026-06-20 22:40:13.750642047 +0000 UTC m=+107337.998183706
bisecting fixing commit since 8f303194b241c2795bb9b79ee80bc93e7876879c
building syzkaller on fca8d36012560bb3df56f0d849e5588ffe9eb992
ensuring issue is reproducible on original commit 8f303194b241c2795bb9b79ee80bc93e7876879c

testing commit 8f303194b241c2795bb9b79ee80bc93e7876879c gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 30d22dbb24a2cebbfa836d0803730c11286a3c4adb9b2eaa50487e2502bc2a09
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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 8f303194b241c2795bb9b79ee80bc93e7876879c gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 766e1d10c0486f1fa0cf8f584a77303b6246c20dbbba32b05391fbc834c214e6
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=8611 leaves diff=2173
split chunks (needed=false): <2173>
split chunk #0 of len 2173 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 8f303194b241c2795bb9b79ee80bc93e7876879c gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 7809b9e409f75b0051a3a9179083f24834d5ce1ac6e1d388e258ea8dccf67c03
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 8f303194b241c2795bb9b79ee80bc93e7876879c gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 7e20f83070b9645287ddf53a7e57f53b960b596794740a5e9596ceb57e4bae2a
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 8f303194b241c2795bb9b79ee80bc93e7876879c gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: ce35122aa5bd43842fa5e5e690a31e1b799d962686d00f34cfcfd5a896d542d4
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 8f303194b241c2795bb9b79ee80bc93e7876879c gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 713defb2578949fe5c5bd60cb89e31b40cfc0557049d48bda3f71b94829ee053
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 8f303194b241c2795bb9b79ee80bc93e7876879c gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 001c98af84144585d1a51d787740b82a54af5e3bd94a20f9a3b42160b01d0477
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 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: c5915d758349b1150dc5ccd58935705a7996ff77def50f0b88b3e00567be7388
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: 2h25m52.309310235s (build: 1h18m26.63692122s, test: 29m0.804243982s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'net-next-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
crash: lost connection to test machine