ci2 starts bisection 2024-02-29 04:47:49.163744173 +0000 UTC m=+17470.057663042 bisecting fixing commit since 4aa6747d935281df8a1888feeb6e22e0097d0b86 building syzkaller on fb427a0782000106c62de76d251e5a02de5406a9 ensuring issue is reproducible on original commit 4aa6747d935281df8a1888feeb6e22e0097d0b86 testing commit 4aa6747d935281df8a1888feeb6e22e0097d0b86 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 3cf454b75e9c9bd7dbb11b827f11d82738331471ca58576de2e35fee27651373 all runs: crashed: WARNING in perf_event_release_kernel representative crash: WARNING in perf_event_release_kernel, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 4aa6747d935281df8a1888feeb6e22e0097d0b86 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 9ecb4faecbeea23c191c61b5faa024643a61169ee71dabf9366982e016c6b5ee all runs: crashed: WARNING in perf_event_release_kernel representative crash: WARNING in perf_event_release_kernel, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed kconfig minimization: base=3820 full=7526 leaves diff=1994 split chunks (needed=false): <1994> split chunk #0 of len 1994 into 5 parts testing without sub-chunk 1/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4aa6747d935281df8a1888feeb6e22e0097d0b86 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 7c77294e864a521664523774e1b483ecd74df4b28368ca07ea7507a264465b9b all runs: crashed: WARNING in perf_event_release_kernel representative crash: WARNING in perf_event_release_kernel, types: [WARNING] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit 4aa6747d935281df8a1888feeb6e22e0097d0b86 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 0795299a9246fcae93e849130d5e06700ed9b5577237396fdcec227245b0f426 all runs: crashed: WARNING in perf_event_release_kernel representative crash: WARNING in perf_event_release_kernel, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 4aa6747d935281df8a1888feeb6e22e0097d0b86 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 685ec26908dab202c15cec4e08981d6ae15438046695176e1f89a6fc636dcbe9 all runs: crashed: WARNING in perf_event_release_kernel representative crash: WARNING in perf_event_release_kernel, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4aa6747d935281df8a1888feeb6e22e0097d0b86 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 320ba9c501bf4c6b69bd928b128af04015dff8f7141e6d9f99d3bd3d21fa9827 all runs: crashed: WARNING in perf_event_release_kernel representative crash: WARNING in perf_event_release_kernel, types: [WARNING] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing commit 4aa6747d935281df8a1888feeb6e22e0097d0b86 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2715700a96905f3c9768ffd8d7d8bac801ceed7bb97b4d52dc013453c53193f0 all runs: crashed: WARNING in perf_event_release_kernel representative crash: WARNING in perf_event_release_kernel, types: [WARNING] the chunk can be dropped disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing current HEAD 81e1dc2f70014b9523dd02ca763788e4f81e5bac testing commit 81e1dc2f70014b9523dd02ca763788e4f81e5bac gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 43d59f8607605fc3fc394af0838fc7e7294ffcad7de4a76f78b46a5e9c06f194 all runs: crashed: WARNING in perf_event_release_kernel representative crash: WARNING in perf_event_release_kernel, types: [WARNING] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 1h21m34.692525631s (build: 52m32.4351579s, test: 26m21.648280662s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.79 crash: WARNING in perf_event_release_kernel ------------[ cut here ]------------ unexpected event refcount: 2; ptr=ffff8881052e9ab8 WARNING: CPU: 1 PID: 1510 at kernel/events/core.c:5073 free_event kernel/events/core.c:5071 [inline] WARNING: CPU: 1 PID: 1510 at kernel/events/core.c:5073 perf_event_release_kernel+0x292/0x2f0 kernel/events/core.c:5238 Modules linked in: CPU: 1 PID: 1510 Comm: syz-executor.0 Not tainted 6.1.79-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:free_event kernel/events/core.c:5071 [inline] RIP: 0010:perf_event_release_kernel+0x292/0x2f0 kernel/events/core.c:5238 Code: 48 89 ef e8 a0 cd f1 ff 4c 89 fb 48 8d 44 24 08 49 39 c7 75 8f eb 20 48 8b b3 58 ff ff ff 48 c7 c7 ed d9 30 82 e8 ee 4e ec ff <0f> 0b eb cc f6 85 ac 00 00 00 03 75 3b 48 8b 3c 24 f0 48 ff 8f 28 RSP: 0018:ffffc900019d3c80 EFLAGS: 00010246 RAX: 88f85326d0ab3000 RBX: ffff8881052e9d88 RCX: 0000000000000002 RDX: 0000000000000000 RSI: c0000000ffffdfff RDI: 00000000ffffffff RBP: ffff8881052d8f58 R08: 0000000000000000 R09: ffffffff826c0a60 R10: 00000000ffffffff R11: 00000000ffffdfff R12: dead000000000122 R13: 0000000000000000 R14: dead000000000100 R15: ffffc900019d3c88 FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa42eebe090 CR3: 00000001046a1000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_release+0xc/0x10 kernel/events/core.c:5259 __fput+0xe1/0x210 fs/file_table.c:320 task_work_run+0x79/0xa0 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x315/0xad0 kernel/exit.c:869 do_group_exit+0x81/0xa0 kernel/exit.c:1019 get_signal+0x751/0x800 kernel/signal.c:2862 arch_do_signal_or_restart+0x92/0x660 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x61/0xc0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x64/0xd0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x28/0x200 kernel/entry/common.c:297 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:299 RIP: 0033:0x7fa42ee92ce9 Code: Unable to access opcode bytes at 0x7fa42ee92cbf. RSP: 002b:00007fa42ea15078 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007fa42efb1f80 RCX: 00007fa42ee92ce9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000200 RBP: 00007fa42eedf47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000006 R14: 00007fa42efb1f80 R15: 00007ffc07e48038