ci2 starts bisection 2024-04-30 12:48:31.187501587 +0000 UTC m=+5489.391438849 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: 5703fbf7114adb825b9d229e3767de6ec521656ab559bf983edd24a3a5c89be8 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 [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], 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: 7d242253c8c8120c2dc26a4d1885d3c98405a4dcd78c086a23edfdebdecbdef1 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 [LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG], 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 [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], 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: 6b9dce5ead73eb0efae92882f260c0c9c8f3a34cd6294b3ce25e5ece68a97977 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 [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], 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: cb4c3994aad65af5f1fba343b03a83d0919cf8d8e350c2ba4cef737ac4612a1c 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 [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: d94d7103b30149f1d89bf4e32fc5ed5b34935d3cc878df7d7dd73ac7e20ce9e8 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 [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: dd60dab176ff8d9b11e577beea01a35d77386568b4099423821c6a1421c2535e 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: 9a3d7be70650b856103dfe38f973567bdc3f2cb04d05e478d76ee9d2b570847f 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 [HANG LEAK UBSAN KASAN LOCKDEP ATOMIC_SLEEP], they are not needed testing current HEAD dcbc050cb0d304c3427d6583384eebcaf0e3caee testing commit dcbc050cb0d304c3427d6583384eebcaf0e3caee gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 577451047ff1d69cb2e8a936c8bf9638adc3db945317f1d5f3bdf8c770d39183 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: 2h2m59.035691721s (build: 52m22.680632969s, test: 1h6m38.712787913s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.89 crash: WARNING in perf_event_release_kernel ------------[ cut here ]------------ unexpected event refcount: 2; ptr=ffff8881027c9ab8 WARNING: CPU: 1 PID: 1535 at kernel/events/core.c:5073 free_event kernel/events/core.c:5071 [inline] WARNING: CPU: 1 PID: 1535 at kernel/events/core.c:5073 perf_event_release_kernel+0x292/0x2f0 kernel/events/core.c:5238 Modules linked in: CPU: 1 PID: 1535 Comm: syz-executor.0 Not tainted 6.1.89-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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 70 cc 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 2d f9 30 82 e8 7e 4c 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:ffffc900018c3c80 EFLAGS: 00010246 RAX: e3ccd524b68bc200 RBX: ffff8881027c9d88 RCX: 0000000000000002 RDX: 0000000000000000 RSI: ffffffff82309b09 RDI: 00000000ffffffff RBP: ffff8881052d0f58 R08: 0000000000000000 R09: ffffffff826c0a60 R10: 00000000ffffffff R11: 00000000ffffdfff R12: dead000000000122 R13: 0000000000000000 R14: dead000000000100 R15: ffffc900018c3c88 FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f888423e090 CR3: 0000000002621000 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:174 exit_to_user_mode_prepare+0x64/0xd0 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x28/0x1f0 kernel/entry/common.c:303 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:301 RIP: 0033:0x7f8884212ce9 Code: Unable to access opcode bytes at 0x7f8884212cbf. RSP: 002b:00007f8883d95078 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007f8884331f80 RCX: 00007f8884212ce9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000200 RBP: 00007f888425f47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f8884331f80 R15: 00007ffc0c850918