ci2 starts bisection 2026-10-13 21:15:15.803918792 +0000 UTC m=+120.775445480
bisecting cause commit starting from 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907
building syzkaller on 745a967f23edac2b4d81b5b13136b67fbb8c5fea
ensuring issue is reproducible on original commit 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907

testing commit 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 8bff2193bf2dcc198df9fdc48dc38a8495f1909106f73dd5c484e6017de77a76
run #0: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #1: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #2: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #3: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #4: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #5: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #6: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #7: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #8: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #9: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #10: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #11: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #12: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #13: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #14: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #15: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #16: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #17: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #18: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #19: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object, types: [KASAN-USE-AFTER-FREE-READ]
check whether we can drop unnecessary instrumentation
disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed
testing commit 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 3d44a955172eb1a20bdb4eb27fd7a8561794d185a2f0133f235748f22de45bf6
run #0: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #1: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #2: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #3: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #4: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #5: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #6: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #7: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
the bug reproduces without the instrumentation
disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed
kconfig minimization: base=4169 full=8454 leaves diff=2102
split chunks (needed=false): <2102>
split chunk #0 of len 2102 into 5 parts
testing without sub-chunk 1/5
disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 33ddae91c6fcf1a0760322a8d78bf54fe1984bb67bc1b9a00dd71fe22fbce95b
run #0: infra problem: create instance operation failed: &{Code:INTERNAL_ERROR ErrorDetails:[] Location: Message:Internal error. Please try again or contact Google Support. (Code: '-8572261871026086415') ForceSendFields:[] NullFields:[]}.
run #1: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #2: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #3: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #4: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #5: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #6: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #7: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #8: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #9: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed
testing commit 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 6ebd6c2c3e51f2ce399e28e38e689f2fe5960c3c85e91c446acf209ed12568c3
run #0: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #1: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #2: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #3: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #4: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #5: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #6: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #7: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #8: crashed: no output from test machine
run #9: crashed: no output from test machine
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
testing without sub-chunk 3/5
disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed
testing commit 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: b1b08d1c4b110d3aa0a5bf35b71f582eb5ec1a9ae91c670070836f8ed12030dd
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [memleak ubsan bug_or_warning locking atomic_sleep hang], they are not needed
testing commit 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 7c88f93bb9db6dbab7845488b743c6ffe9acfd8d6d5c4abb6521d2f23e0b3e35
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [hang memleak ubsan bug_or_warning locking atomic_sleep], they are not needed
testing commit 24a19b953e2a3d0ea5a8c4951a0ab8f32720c907 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 3213b5655b9d65782dbcae1d4ccbf3445e7e58a86d9edccfd3cf0b59ac7ea9f5
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
the chunk can be dropped
disabling configs for [locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
picked [v7.2 v7.1 v7.0 v6.18 v6.16 v6.14 v6.12 v6.10 v6.7 v6.4 v6.1 v5.18 v5.15 v5.12 v5.9 v5.6 v5.3 v5.0 v4.19] out of 45 release tags
testing release v7.2
testing commit 8d3ae59288f1e7d58d76558a6ee96d533bc5019f gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 2bfec2c2f2016e5978b1cd383f5ec50c02b5e1773368999f204563143213a571
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v7.1
testing commit 8cd9520d35a6c38db6567e97dd93b1f11f185dc6 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 144aaea164f02e4ccba352529b9c585dd9dcb50ed75b66794621e89cdc4bafe6
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v7.0
testing commit 028ef9c96e96197026887c0f092424679298aae8 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 51fc0ce23e5662ad261249881ab01477fb5edcc1518cc09d37d9fe4d4ccd25b2
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v6.18
testing commit 7d0a66e4bb9081d75c82ec4957c50034cb0ea449 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 952abb7e7b57d80d0859293b3cf111f88c9cd0ff0a404e627fae541d7b868240
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v6.16
testing commit 038d61fd642278bab63ee8ef722c50d10ab01e8f gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 5d267e381a38d9afa3cf21dabc9ca262c0676ed05291256d2a435e3390e56355
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v6.14
testing commit 38fec10eb60d687e30c8c6b5420d86e8149f7557 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 8fbf8b9d1c8e7f3117e0031b69835c4398a23a1c65ea901e9fe30102fea6021a
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v6.12
testing commit adc218676eef25575469234709c2d87185ca223a gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 637d035734299abd3f99b529b25390c5f41083d70cd7e43d8c9a4f9d1ea02d78
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v6.10
testing commit 0c3836482481200ead7b416ca80c68a29cfdaabd gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 620510a1fa1ed4d79d29a278395596d6b49b3081f0707e794c1166ab190c980c
run #0: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #1: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #2: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #3: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #4: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #5: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #6: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #7: crashed: KASAN: slab-use-after-free Read in acpi_ns_get_attached_object
run #8: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
run #9: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v6.7
testing commit 0dd3ee31125508cd67f7e7172247f05b7fd1753a gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 7159ae3da644ecf8ecf390bf5278ccf6c48bc1f15afbb42ea087363c24f32eea
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v6.4
testing commit 6995e2de6891c724bfeb2db33d7b87775f913ad1 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 7d535edc419528eb700771633b19419ba2936bea225fdbc8072e966f04dd4198
all runs: crashed: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: slab-use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v6.1
testing commit 830b3c68c1fb1e9176028d02ef86f3cf76aa2476 gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: 2f77f89fc05d5b915794a0df4a6fe8aba943e18fc0cf9786d625f1d6f1150866
run #0: infra problem: create instance operation failed: &{Code:INTERNAL_ERROR ErrorDetails:[] Location: Message:Internal error. Please try again or contact Google Support. (Code: '5255035810988909790') ForceSendFields:[] NullFields:[]}.
run #1: boot failed: can't ssh into the instance
run #2: boot failed: can't ssh into the instance
run #3: boot failed: can't ssh into the instance
run #4: boot failed: can't ssh into the instance
run #5: boot failed: can't ssh into the instance
run #6: boot failed: can't ssh into the instance
run #7: boot failed: can't ssh into the instance
run #8: boot failed: can't ssh into the instance
run #9: 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 v5.18
testing commit 4b0986a3613c92f4ec1bdc7f60ec66fea135991f gcc
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
kernel signature: ddb6aacd88226c3bae547d28a2f37455657a0bb8addf7e7393603b74697589db
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 v5.15
testing commit 8bb7eca972ad531c9b149c0a51ab43a417385813 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: a8c619fc90770076f8641288d97932ed7adaa8702b2bc1d04e85ab6a7dd0ab60
all runs: crashed: KASAN: use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v5.12
testing commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 94dfb74f74cc05ed8bcc22468489f9e0424140ca0587cb967aab690a53a3feb5
all runs: crashed: KASAN: use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v5.9
testing commit bbf5c979011a099af5dc76498918ed7df445635b gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 5a19b5b5bd6ba5cca7bc513bc25593259e2e1237d30435661da6d048008d5316
all runs: crashed: KASAN: use-after-free Read in acpi_ut_update_object_reference
representative crash: KASAN: use-after-free Read in acpi_ut_update_object_reference, types: [KASAN-USE-AFTER-FREE-READ]
testing release v5.6
testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 gcc
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 7858e4f97e899748a2d78f3b1dbdf121f9bcf207c715fad31c6d1c772c13f9ae
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 v5.3
testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 gcc
compiler: gcc (GCC) 8.4.1 20210217
failed building 4d856f72c10ecb060868ed10ff1b1453943fc6c8: 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 v5.0
testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 gcc
compiler: gcc (GCC) 8.4.1 20210217
failed building 1c163f4c7b3f621efff9b28a47abb36f7378d783: 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: 23, total time: 8h41m38.49475758s (build: 2h19m15.209053168s, test: 3h46m49.570387986s)
error: oldest tested release had kernel build, boot or test errors