ci starts bisection 2026-07-15 00:46:44.066213551 +0000 UTC m=+95132.244842398
bisecting fixing commit since 6916d5703ddf9a38f1f6c2cc793381a24ee914c6
building syzkaller on de5aae85e5f28e2fa1c7deefcc24fe286abe5140
ensuring issue is reproducible on original commit 6916d5703ddf9a38f1f6c2cc793381a24ee914c6

testing commit 6916d5703ddf9a38f1f6c2cc793381a24ee914c6 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 73cab87a010af7515b8f4d34932bb30d8a2f92f4bc30f85d1d9c7a4c5d7ac177
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 6916d5703ddf9a38f1f6c2cc793381a24ee914c6 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 1ce37ccb69b151a10a8d24fc12f065b2933e4dfde2fd8d08ed4e99f5168895af
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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
kconfig minimization: base=4147 full=8589 leaves diff=2148
split chunks (needed=false): <2148>
split chunk #0 of len 2148 into 5 parts
testing without sub-chunk 1/5
disabling configs for [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit 6916d5703ddf9a38f1f6c2cc793381a24ee914c6 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 111724739aba000f67411f3d96185f97943c70bbe223a395f147d4aa1b577d1f
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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 6916d5703ddf9a38f1f6c2cc793381a24ee914c6 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: fbe127fd450fedd4d59509a66b49d92bdfc5c765e6895cf6d244253254821880
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 6916d5703ddf9a38f1f6c2cc793381a24ee914c6 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 87bd3adc241640d95e5acabe61713691bfa2168c2feafa4b4dea08eeaa90e3c0
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 [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit 6916d5703ddf9a38f1f6c2cc793381a24ee914c6 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 50d0cb2e86784f03691656782fa851060035db3f4973a30cdca325191d59233c
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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
testing commit 6916d5703ddf9a38f1f6c2cc793381a24ee914c6 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 7af6e4ffe5cb22c45b9c6de8dc228addfc625a60c2660a94bff200b167dc3e24
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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
testing current HEAD 58717b2a1365d06c8c64b72aa948541b53fe31eb
testing commit 58717b2a1365d06c8c64b72aa948541b53fe31eb gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 4460b31c0b75ca9c1ea997aca5512e86b331a19f471c49cb2144d8f2d9c36db4
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: 4h22m32.588877838s (build: 2h27m51.863907115s, test: 32m54.760064512s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'sound-7.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
crash: lost connection to test machine