ci2 starts bisection 2024-01-25 14:23:03.739611299 +0000 UTC m=+89064.645624125 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: 0c20528f5c13d3955bb8f8ddc6329e46415cdb655f43eb14a98850faa46733eb 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: 0e378d4f6af869a049ce302ddcd69a43c9a4df768bf463e510d666f6f243d65d 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=1996 split chunks (needed=false): <1996> split chunk #0 of len 1996 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: c5f751f2fe8a21fdf21f9a5bed0c8b39135a53d5e1625c81b1c50cab3c21d902 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 [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: c430f1860fb6784abdaa32c81f85784c23ceb9231a9104fc1b030319e8179497 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 [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: d1494ddff0fe6a926d0f49377c2c41b022e90e9b833987d384c2c65606f260e3 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: 5eb41587be446b4134cdb57eb508008d7926511bfb9700e3366d11e30679a416 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 [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: aaf1463b19be54a93652b0944d6fae4c528c3b7c0a930ba70aafb5e925e7dfdb 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 [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing current HEAD 8fd7f44624538675abadc73f5a44e95016964d22 testing commit 8fd7f44624538675abadc73f5a44e95016964d22 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6131d9f2a65ed1737feb3acc7d577393a161a4c0ca3344bb915706c7d759580f 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: 57m40.485130125s (build: 27m1.750917309s, test: 25m56.900936754s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.74 crash: WARNING in perf_event_release_kernel ------------[ cut here ]------------ unexpected event refcount: 2; ptr=ffff88810a2e1008 WARNING: CPU: 1 PID: 1513 at kernel/events/core.c:5073 free_event kernel/events/core.c:5071 [inline] WARNING: CPU: 1 PID: 1513 at kernel/events/core.c:5073 perf_event_release_kernel+0x292/0x2f0 kernel/events/core.c:5238 Modules linked in: CPU: 1 PID: 1513 Comm: syz-executor.0 Not tainted 6.1.74-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 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 00 d1 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 db 30 82 e8 5e 53 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:ffffc90001a23c80 EFLAGS: 00010246 RAX: af388932f4d3c700 RBX: ffff88810a2e12d8 RCX: 0000000000000002 RDX: 0000000000000000 RSI: c0000000ffffdfff RDI: 00000000ffffffff RBP: ffff888104ede558 R08: 0000000000000000 R09: ffffffff826c09d0 R10: 00000000ffffffff R11: 00000000ffffdfff R12: dead000000000122 R13: 0000000000000000 R14: dead000000000100 R15: ffffc90001a23c88 FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f74a5f7bad0 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: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: 0033:0x7f74a5f54ce9 Code: Unable to access opcode bytes at 0x7f74a5f54cbf. RSP: 002b:00007f74a5ad7078 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007f74a6073f80 RCX: 00007f74a5f54ce9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000200 RBP: 00007f74a5fa147a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f74a6073f80 R15: 00007ffec6793dd8