ci starts bisection 2026-06-14 13:21:02.493246128 +0000 UTC m=+173952.725004498
bisecting cause commit starting from c425609d6ac4012c8bbf01ec2e10e801b1923a7b
building syzkaller on 1d2f35898f2e0325486423250d5303b6bc05adcd
ensuring issue is reproducible on original commit c425609d6ac4012c8bbf01ec2e10e801b1923a7b

testing commit c425609d6ac4012c8bbf01ec2e10e801b1923a7b gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 814d5c7a5d11f9f110eb28d05a1fcafff987d01d78a4305521179dd2f7dc9bd2
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 c425609d6ac4012c8bbf01ec2e10e801b1923a7b gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 5590bea34c7dd10ae09753429c92353c6178942695eb5f1e0a16243074c516f1
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=4144 full=8402 leaves diff=2112
split chunks (needed=false): <2112>
split chunk #0 of len 2112 into 5 parts
testing without sub-chunk 1/5
disabling configs for [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit c425609d6ac4012c8bbf01ec2e10e801b1923a7b gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 3780303880ef7cd5ac87c1d49eec2e97bfbb19304b9418760a3dd18fc9209491
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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit c425609d6ac4012c8bbf01ec2e10e801b1923a7b gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 72461808b4b6431bfedbb702e8d986bbf298f9fa1a584c2f3427e7a21d72416c
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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
testing commit c425609d6ac4012c8bbf01ec2e10e801b1923a7b gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 204e89af3451750026e8bd0c48b39c8fead2acb2fb2bf79447fb688f73469467
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 c425609d6ac4012c8bbf01ec2e10e801b1923a7b gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 8ffbfdad4d0d8a2d7633c27dd0ba6c5b254030f067bf0dee1ecef50de6289e1f
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 c425609d6ac4012c8bbf01ec2e10e801b1923a7b gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 1a207e5ebab9ff542244a0dc597e243ce03eab5f557d6651b2b66ceac4728440
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
picked [v7.0 v6.19 v6.18 v6.16 v6.14 v6.12 v6.10 v6.8 v6.5 v6.2 v5.19 v5.16 v5.13 v5.10 v5.7 v5.4 v5.1 v4.19] out of 43 release tags
testing release v7.0
testing commit 028ef9c96e96197026887c0f092424679298aae8 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: d8e56a1e5ac063cfe936ff3eda70acc68ecc655d40261cc21d1571c57e4be313
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.19
testing commit 05f7e89ab9731565d8a62e3b5d1ec206485eeb0b gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 03b05c4bec66ae20ba3a9eda957e667e19e74142e5b2f173486d20db60863afd
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.18
testing commit 7d0a66e4bb9081d75c82ec4957c50034cb0ea449 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 986b249b12ae52c4c17c62862d4737e1a3f10e865be5d0425b47430a0f7a4bba
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.16
testing commit 038d61fd642278bab63ee8ef722c50d10ab01e8f gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: a97d1b7b47518cdff622d627f176fe3581ee087d1d5e5e4a1b3b0da6a6b84d3e
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.14
testing commit 38fec10eb60d687e30c8c6b5420d86e8149f7557 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 99608a400764da037929386e693a2101d420782e4e972da55383bbd529488f35
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.12
testing commit adc218676eef25575469234709c2d87185ca223a gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 26ee7e47086f32cc17b3948b82d7acdf9875085939af672874490259782ab8b9
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.10
testing commit 0c3836482481200ead7b416ca80c68a29cfdaabd gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 3238005869f6745bada4cc2eadbb9136ac5e8578a212a8514d4c9cf08e4d4be3
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.8
testing commit e8f897f4afef0031fe618a8e94127a0934896aba gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: f58ac4a2ccb81b353855188e4d59a2d6105fc2cbeb48a7e555221e43e118e995
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.5
testing commit 2dde18cd1d8fac735875f2e4987f11817cc0bc2c gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 3ef5a05607a1a7d2bc913d253ba91af431773e608bb650a44f392ecfbb9525c9
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.2
testing commit c9c3395d5e3dcc6daee66c6908354d47bf98cb0c gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
kernel signature: 4e62419ef3b4673a28b09d23f8e9ff4007008a5ffbe2868218aa533ffb81bb38
all runs: boot failed: can't ssh into the instance
unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0
testing release v5.19
testing commit 3d7cb6b04c3f3115719235cc6866b10326de34cd gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
failed building 3d7cb6b04c3f3115719235cc6866b10326de34cd: ld.lld: error: version script assignment of 'LINUX_2.6' to symbol '__vdso_sgx_enter_enclave' failed: symbol not defined
llvm-objdump: error: 'arch/x86/entry/vdso/vdso64.so.dbg': No such file or directory
llvm-objcopy: error: 'arch/x86/entry/vdso/vdso64.so.dbg': No such file or directory
testing release v5.16
testing commit df0cc57e057f18e44dac8e6c18aba47ab53202f9 gcc
compiler: Debian clang version 22.1.6 (++20260514074242+fc4aad7b5db3-1~exp1~20260514074407.73), Debian LLD 22.1.6
failed building df0cc57e057f18e44dac8e6c18aba47ab53202f9: scripts/sign-file.cscripts/extract-cert.c:46::14: warning: 89'ERR_get_error_line' is deprecated [-Wdeprecated-declarations]:14:
/usr/include/openssl/err.h:425:1:/usr/include/openssl/err.h :425note: :'ERR_get_error_line' has been explicitly marked deprecated here1
scripts/sign-file.c:102:9: warning: 'ERR_get_error_line' is deprecated [-Wdeprecated-declarations]
/usr/include/openssl/err.h:425:1: note: 'ERR_get_error_line' has been explicitly marked deprecated here
ld.lld: error: version script assignment of 'LINUX_2.6' to symbol '__vdso_sgx_enter_enclave' failed: symbol not defined
llvm-objdump: error: 'arch/x86/entry/vdso/vdso64.so.dbg': No such file or directory
llvm-objcopy: error: 'arch/x86/entry/vdso/vdso64.so.dbg': No such file or directory
testing release v5.13
testing commit 62fb9874f5da54fdb243003b386128037319b219 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 2864553e947c4b0de4b98b77440f24597d83551ca2c46afca2ae96d785f95214
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v5.10
testing commit 2c85ebc57b3e1817b6ce1a6b703928e113a90442 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: d4262e193825acec04c0f1830f6fa4dd188bb6dfb10dae20605a7e949a539d10
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v5.7
testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 gcc
compiler: gcc version 8.4.1 20210217 (GCC), GNU ld (GNU Binutils for Debian) 2.44
kernel signature: b28a28688ce9c33ce0b205145a750f408adcb39ebbeef67f7748080328807dc7
all runs: boot failed: can't ssh into the instance
unable to determine the verdict: 0 good runs (wanted 5), for bad wanted 5 in total, got 0
testing release v5.4
testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 gcc
compiler: gcc (GCC) 8.4.1 20210217
failed building 219d54332a09e8d8741c1e1982f5eae56099de85: scripts/extract-cert.c:46:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
scripts/extract-cert.c:59:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
scripts/sign-file.c:89:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
scripts/sign-file.c:102:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
tools/include/linux/string.h:20:15: error: redundant redeclaration of 'strlcpy' [-Werror=redundant-decls]
testing release v5.1
testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd gcc
compiler: gcc (GCC) 8.4.1 20210217
failed building e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd: scripts/extract-cert.c:46:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
scripts/extract-cert.c:59:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
scripts/sign-file.c:89:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
scripts/sign-file.c:102:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
tools/include/linux/string.h:17:15: error: redundant redeclaration of 'strlcpy' [-Werror=redundant-decls]
testing release v4.19
testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d gcc
compiler: gcc (GCC) 8.4.1 20210217
failed building 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d: scripts/extract-cert.c:46:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
scripts/extract-cert.c:59:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
scripts/sign-file.c:89:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
scripts/sign-file.c:102:9: warning: 'ERR_get_error_line' is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
tools/include/linux/string.h:17:15: error: redundant redeclaration of 'strlcpy' [-Werror=redundant-decls]
revisions tested: 20, total time: 11h55m39.659887453s (build: 9h25m24.380876387s, test: 1h20m49.760749015s)
error: oldest tested release had kernel build, boot or test errors