ci starts bisection 2026-07-13 02:02:19.56808403 +0000 UTC m=+173514.352889673
bisecting cause commit starting from a635d6748234582ea287c5ffeae28b9b23f91c7e
building syzkaller on 99e643756a094413adb404dd52825e7034232325
ensuring issue is reproducible on original commit a635d6748234582ea287c5ffeae28b9b23f91c7e

testing commit a635d6748234582ea287c5ffeae28b9b23f91c7e gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 1f9f636bbe7f7918a7a6c04e1dba1c3cd2a44625d68fae75da6c4cb0ec04c784
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 [locking atomic_sleep hang memleak ubsan bug_or_warning kasan], they are not needed
testing commit a635d6748234582ea287c5ffeae28b9b23f91c7e gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 299db015aa19bb56ad9bf65a8c8fb7e4ab78284534c679cd64c72c0fe7353b8c
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=4140 full=8594 leaves diff=2147
split chunks (needed=false): <2147>
split chunk #0 of len 2147 into 5 parts
testing without sub-chunk 1/5
disabling configs for [bug_or_warning kasan locking atomic_sleep hang memleak ubsan], they are not needed
testing commit a635d6748234582ea287c5ffeae28b9b23f91c7e gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 8eee8e2b71dc27fc26c7fc403595b9679d4f1177f72916d92c8b7e745fb76ca9
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 [ubsan bug_or_warning kasan locking atomic_sleep hang memleak], they are not needed
testing commit a635d6748234582ea287c5ffeae28b9b23f91c7e gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: e70de166d032534509bdd27c39c9d8a90c84b1ccc9d8aafdc530ba83b8dd319c
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 a635d6748234582ea287c5ffeae28b9b23f91c7e gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 62007821cdad37373da36f15b3786446b96c4019607b6689bc50ab7f33de511f
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 [kasan locking atomic_sleep hang memleak ubsan bug_or_warning], they are not needed
testing commit a635d6748234582ea287c5ffeae28b9b23f91c7e gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 1dc65a63743857895df2200783c043fb6516c4db0d82b3cd390d2609d8463af8
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 [atomic_sleep hang memleak ubsan bug_or_warning kasan locking], they are not needed
testing commit a635d6748234582ea287c5ffeae28b9b23f91c7e gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: b58e9ce3d40740592beee26137d038119b16aa49dd48f4a410c134e144dd1c4d
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 [hang memleak ubsan bug_or_warning kasan locking atomic_sleep], they are not needed
picked [v7.1 v7.0 v6.19 v6.17 v6.15 v6.13 v6.11 v6.9 v6.6 v6.3 v6.0 v5.17 v5.14 v5.11 v5.8 v5.5 v5.2 v4.20 v4.19] out of 44 release tags
testing release v7.1
testing commit 8cd9520d35a6c38db6567e97dd93b1f11f185dc6 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 94156e0da04d4f47ba9317a78335ff1140bfe670a8b6ed79c5eaa2ddb43f23de
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v7.0
testing commit 028ef9c96e96197026887c0f092424679298aae8 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: da22f7413135348d169528227c9534aa1e121932116c8795af44f0e763d03bf7
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: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 9943db94dc45c1726641498467c99d7bb54e4d15630241c7e9b09894d429a291
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.17
testing commit e5f0a698b34ed76002dc5cff3804a61c80233a7a gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 58e6ace090a2130aad4ac1e72c4b9bdc43544d090144a1a486ef0021e1ba9230
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.15
testing commit 0ff41df1cb268fc69e703a08a57ee14ae967d0ca gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 56649ec8b543b3270a22492e7fb095200931f026310e0ea66b7b92a08d27b12d
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.13
testing commit ffd294d346d185b70e28b1a28abe367bbfe53c04 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: f98ec4e9a00ad16c925bf30d2fa1fb1b5c0c8861a0ba924f2f5edb603026880e
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.11
testing commit 98f7e32f20d28ec452afb208f9cffc08448a2652 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 21dcdbf47bb3c9aa14766b098597f6b41ba49e1919c6a3c0048a3e14cbba9be2
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.9
testing commit a38297e3fb012ddfa7ce0321a7e5a8daeb1872b6 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 0baa9657b863dc4562e11ef7878685edf5b68f634bdb735fdc0d9473d9da8006
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.6
testing commit ffc253263a1375a65fa6c9f62a893e9767fbebfa gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 6c12afdc424157b9b5960b210088ca18c29b1e87cea052bcc3d5bae6c1d317f6
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.3
testing commit 457391b0380335d5e9a5babdec90ac53928b23b4 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 8fe7e7f58c8eed8206f21bba771075ebcf787df3d5ae635db00983022310bf44
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v6.0
testing commit 4fe89d07dcc2804c8b562f6c7896a45643d34b2f gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 1abb94673dad7eacd65ad50defb1f1f7426859f307b97d1ead413677ac3e3b75
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v5.17
testing commit f443e374ae131c168a065ea1748feac6b2e76613 gcc
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 02b90493cdc0be9f9a0f63bcc197daca05a1cba4cf28e126241af06a121899dd
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v5.14
testing commit 7d2a07b769330c34b4deabeed939325c77a7ec2f gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 61ce5fca99d058a7f8a6e3e289142dc1dc451e1661370e6823164557391e77d8
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v5.11
testing commit f40ddce88593482919761f74910f42f4b84c004b gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 35ae259f6118dcaa9c6be993bba6d2e244ac4ff399bb1021a1d9b6562acf815c
all runs: crashed: lost connection to test machine
representative crash: lost connection to test machine, types: [LOST_CONNECTION]
testing release v5.8
testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c gcc
compiler: gcc (GCC) 8.4.1 20210217, GNU ld (GNU Binutils for Debian) 2.44
kernel signature: 9ebb4fff674ea886584b211bad43fbef5d8a434c5d1efe593ecf82ce5e07c85f
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 v5.5
testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 gcc
compiler: gcc (GCC) 8.4.1 20210217
failed building d5226fa6dbae0569ee43ecfc08bdcd6770fc4755: 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 v5.2
testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 gcc
compiler: gcc (GCC) 8.4.1 20210217
failed building 0ecfebd2b52404ae0c54a878c872bb93363ada36: 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 v4.20
testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be gcc
compiler: gcc (GCC) 8.4.1 20210217
failed building 8fe28cb58bcb235034b64cbbb7550a8a43fd88be: 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: 22, total time: 6h45m32.76763363s (build: 3h47m14.252118647s, test: 1h34m8.316318644s)
error: oldest tested release had kernel build, boot or test errors