ci2 starts bisection 2024-03-30 11:16:56.071045434 +0000 UTC m=+36172.802363451 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: bd6d7a8baea8b67d510b1cffbdc3ff8abe7c559378a51b9275f57d1d9515d090 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: 88cab7481ee1781b82206fb412ce479b3df1a73c9d053fbed24dae4ebdacc241 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 [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: ee1a400af52a3605e3436d5aaf56e4226092589e11decfb0d69862138a5c8203 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 [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: 5894fb1ebfa8b1811cdf44f8c243950cea0d82cd236f41f5bfecac71bacd101f 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 [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: 243f6c168297a4541f021482de336241a04ef4da00013aaf062a139b4c7a6a2a 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: 25ddeaca9160652279996d46e6c3b66a333ec7f5023eb27580ea0061bee4eb9c 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 [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: fe8c99add99fa67ab6aea729044743a2ae4c24b8a74531c036b95ff0bc77a869 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 e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 testing commit e5cd595e23c1a075359a337c0e5c3a4f2dc28dd1 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 89d4fb2e602093af68884b0ce5e34840405d20d80d85b0444b8ec93242e5036b 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: 1h31m24.742102353s (build: 40m18.90950863s, test: 48m12.767558253s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.83 crash: WARNING in perf_event_release_kernel ------------[ cut here ]------------ unexpected event refcount: 2; ptr=ffff888102bc9560 WARNING: CPU: 0 PID: 1573 at kernel/events/core.c:5073 free_event kernel/events/core.c:5071 [inline] WARNING: CPU: 0 PID: 1573 at kernel/events/core.c:5073 perf_event_release_kernel+0x292/0x2f0 kernel/events/core.c:5238 Modules linked in: CPU: 0 PID: 1573 Comm: syz-executor.0 Not tainted 6.1.83-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 90 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 cd e4 30 82 e8 9e 4d 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:ffffc90001aebc80 EFLAGS: 00010246 RAX: b269d0f1cbaab700 RBX: ffff888102bc9830 RCX: 0000000000000002 RDX: 0000000000000000 RSI: c0000000ffffdfff RDI: 00000000ffffffff RBP: ffff888103329358 R08: 0000000000000000 R09: ffffffff826c0a60 R10: 00000000ffffffff R11: 00000000ffffdfff R12: dead000000000122 R13: 0000000000000000 R14: dead000000000100 R15: ffffc90001aebc88 FS: 0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f12a8668988 CR3: 0000000002621000 CR4: 00000000003506f0 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+0x28/0x1f0 kernel/entry/common.c:297 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:300 RIP: 0033:0x7f12a8547ce9 Code: Unable to access opcode bytes at 0x7f12a8547cbf. RSP: 002b:00007f12a80ca078 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007f12a8666f80 RCX: 00007f12a8547ce9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000200 RBP: 00007f12a859447a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f12a8666f80 R15: 00007ffc6b9d2a38