ci starts bisection 2024-07-09 13:32:28.440410373 +0000 UTC m=+40.569795809 bisecting fixing commit since 7c5e046bdcb2513f9decb3765d8bf92d604279cf building syzkaller on fb427a0782000106c62de76d251e5a02de5406a9 ensuring issue is reproducible on original commit 7c5e046bdcb2513f9decb3765d8bf92d604279cf testing commit 7c5e046bdcb2513f9decb3765d8bf92d604279cf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: e7ea254956182d941c30d0971c79cbe1e027f1dd3c4bee61124025d440702343 all runs: crashed: WARNING in free_event representative crash: WARNING in free_event, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing commit 7c5e046bdcb2513f9decb3765d8bf92d604279cf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 1b622618a40f4d08f876cd1e3fc482d46fd46885717c8b4936172956dbaeac80 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=3998 full=7658 leaves diff=2018 split chunks (needed=false): <2018> split chunk #0 of len 2018 into 5 parts testing without sub-chunk 1/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN KASAN], they are not needed testing commit 7c5e046bdcb2513f9decb3765d8bf92d604279cf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: bb47d43f7f69198671f5f968583e018b658b01f0b77bcd8d5f853cf19de68653 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 7c5e046bdcb2513f9decb3765d8bf92d604279cf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2ea3be52f835e9724288834f430b036be70a2d0cbc7b10aba82145f1301fa52d 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 [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed testing commit 7c5e046bdcb2513f9decb3765d8bf92d604279cf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 2076471647f869e475d48af016f57cd9c27bea2b81cb67d27251aa8b0eba62da 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 [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 7c5e046bdcb2513f9decb3765d8bf92d604279cf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 30ada9e2d4fcf289d1a383962f802305c4460f9fc93f5ee9591af3444f199ff2 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 [UBSAN KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK], they are not needed testing commit 7c5e046bdcb2513f9decb3765d8bf92d604279cf gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5897f9d3b6d083f510750fd00cbd30b32e403d69fafc049871b1a30e5a797d33 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 f0c18025693707ec344a70b6887f7450bf4c826b testing commit f0c18025693707ec344a70b6887f7450bf4c826b gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 55d687b44daf835fd2446b56b0d9241ad69610dfbf52f9d1dd221a256b51f3f1 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: 7h40m51.330201174s (build: 4h58m22.676977238s, test: 40m34.279723084s) crash still not fixed or there were kernel test errors commit msg: skmsg: Skip zero length skb in sk_msg_recvmsg crash: WARNING in perf_event_release_kernel ------------[ cut here ]------------ unexpected event refcount: 2; ptr=ffff888108fc5280 WARNING: CPU: 1 PID: 1825 at kernel/events/core.c:5275 free_event kernel/events/core.c:5273 [inline] WARNING: CPU: 1 PID: 1825 at kernel/events/core.c:5275 perf_event_release_kernel+0x2c4/0x320 kernel/events/core.c:5453 Modules linked in: CPU: 1 PID: 1825 Comm: syz-executor.0 Not tainted 6.10.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:free_event kernel/events/core.c:5273 [inline] RIP: 0010:perf_event_release_kernel+0x2c4/0x320 kernel/events/core.c:5453 Code: df e8 80 36 ef ff 4c 89 fd 48 8d 44 24 10 49 39 c7 75 8c eb 24 90 48 8b b5 58 ff ff ff 48 c7 c7 70 2f 41 82 e8 fd 87 e8 ff 90 <0f> 0b 90 90 eb c8 f6 85 ac 00 00 00 03 75 41 48 8b 3c 24 f0 48 ff RSP: 0018:ffffc9000162fcd0 EFLAGS: 00010246 RAX: e5ec4f06ebdd8000 RBX: ffff888108b3cf2c RCX: 0000000000000002 RDX: 0000000000000002 RSI: 00000000ffffdfff RDI: 00000000ffffffff RBP: ffff888108fc5560 R08: 0000000000000000 R09: ffffffff826c3600 R10: ffffc9000162fba8 R11: ffffc9000162fb50 R12: dead000000000122 R13: 0000000000000000 R14: dead000000000100 R15: ffffc9000162fce0 FS: 0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa0bfc2e988 CR3: 0000000105a86000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_release+0x10/0x20 kernel/events/core.c:5474 __fput+0x8f/0x2c0 fs/file_table.c:422 task_work_run+0x82/0xb0 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x271/0x9d0 kernel/exit.c:876 do_group_exit+0x86/0xa0 kernel/exit.c:1025 get_signal+0x6c1/0x710 kernel/signal.c:2909 arch_do_signal_or_restart+0x89/0x2a0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x58/0x1f0 kernel/entry/common.c:218 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244