audit: type=1400 audit(1664778369.507:8): avc: denied { kernel } for pid=3742 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 3743 at kernel/events/core.c:2233 perf_event_task_tick+0xbeb/0x1050 Modules linked in: CPU: 1 PID: 3743 Comm: syz-executor.4 Not tainted 6.0.0-rc7-next-20220930 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:perf_event_task_tick+0xbeb/0x1050 Code: e9 34 fd ff ff e8 05 33 ef ff 65 44 8b 35 89 9c ab 7e 31 ff 44 89 f6 e8 a3 2f ef ff 45 85 f6 0f 84 04 01 00 00 e8 e5 32 ef ff <0f> 0b e9 60 fa ff ff e8 d9 32 ef ff 65 8b 1d 5e 9c ab 7e 31 ff 89 RSP: 0018:ffff88806cf09600 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff88803f0b8000 RCX: 0000000000000100 RDX: ffff88803fa2b580 RSI: ffffffff8156d94b RDI: 0000000000000005 RBP: ffff88800f35d908 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88803f0b8098 R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fefb10f3700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f300f8c2c00 CR3: 0000000017ff4000 CR4: 0000000000350ee0 Call Trace: scheduler_tick+0x17e/0x350 update_process_times+0x138/0x190 tick_sched_handle+0x9b/0x180 tick_sched_timer+0xf2/0x120 __hrtimer_run_queues+0x184/0xb50 hrtimer_interrupt+0x315/0x770 __sysvec_apic_timer_interrupt+0x144/0x500 sysvec_apic_timer_interrupt+0x3b/0xc0 asm_sysvec_apic_timer_interrupt+0x16/0x20 RIP: 0010:__orc_find+0x39/0xf0 Code: 55 53 48 83 ec 10 85 d2 0f 84 99 00 00 00 49 89 fd 4c 39 e7 0f 87 a2 00 00 00 49 bf 00 00 00 00 00 fc ff df 49 89 fe 48 89 fd 0c 48 8d 6b 04 49 89 de 49 39 ec 72 4d 4c 89 e0 48 29 e8 48 89 RSP: 0018:ffff88806cf099b0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff813b99e3 RDX: 0000000000000001 RSI: ffffffff85e8bda2 RDI: ffffffff85b84404 RBP: ffffffff85b84404 R08: ffffffff85e8bda2 R09: ffffffff85e8bd40 R10: ffff88806cf09ff8 R11: 000000000003603d R12: ffffffff85b84404 R13: ffffffff85b84404 R14: ffffffff85b84404 R15: dffffc0000000000 unwind_next_frame+0x2b4/0x20b0 arch_stack_walk+0x83/0xf0 stack_trace_save+0x8c/0xc0 kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x2a/0x50 __kasan_slab_free+0x106/0x190 kmem_cache_free+0xf7/0x610 rcu_core+0x7e2/0x2080 __do_softirq+0x1c3/0x8f5 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x5/0x20 sysvec_apic_timer_interrupt+0x8e/0xc0 asm_sysvec_apic_timer_interrupt+0x16/0x20 RIP: 0010:__get_user_nocheck_4+0x8/0x20 Code: 66 90 0f 01 cb 0f ae e8 0f b7 10 31 c0 0f 01 ca e9 cd 0a 4c 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 01 cb 0f ae e8 8b 10 <31> c0 0f 01 ca e9 ae 0a 4c 00 66 66 2e 0f 1f 84 00 00 00 00 00 0f RSP: 0018:ffff888040ddfaf8 EFLAGS: 00040202 RAX: 00007fefb3c90f68 RBX: ffff888040ddfb70 RCX: ffffc90007212000 RDX: 0000000000000000 RSI: ffffffff813aeaec RDI: ffff88803fa2c9e8 RBP: ffff88803fa2b580 R08: 0000000000000001 R09: ffff888040ddfa9b R10: ffffed10081bbf53 R11: 0000000000000001 R12: 00007fefb3c90f68 R13: ffffed10081bbf86 R14: ffff888040ddfcc0 R15: 0000000000000000 futex_get_value_locked+0x53/0x100 futex_wait_setup+0x101/0x230 futex_wait+0x264/0x690 do_futex+0x2ff/0x380 __x64_sys_futex+0x1c6/0x4d0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fefb3b7db19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fefb10f3218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007fefb3c90f68 RCX: 00007fefb3b7db19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fefb3c90f68 RBP: 00007fefb3c90f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fefb3c90f6c R13: 00007ffe4a09fa4f R14: 00007fefb10f3300 R15: 0000000000022000 irq event stamp: 1347 hardirqs last enabled at (1346): [] asm_sysvec_apic_timer_interrupt+0x16/0x20 hardirqs last disabled at (1347): [] sysvec_apic_timer_interrupt+0xb/0xc0 softirqs last enabled at (908): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (1041): [] __irq_exit_rcu+0x11b/0x180 ---[ end trace 0000000000000000 ]--- hrtimer: interrupt took 58149604 ns ====================================================== ---------------- Code disassembly (best guess): 0: 55 push %rbp 1: 53 push %rbx 2: 48 83 ec 10 sub $0x10,%rsp 6: 85 d2 test %edx,%edx 8: 0f 84 99 00 00 00 je 0xa7 e: 49 89 fd mov %rdi,%r13 11: 4c 39 e7 cmp %r12,%rdi 14: 0f 87 a2 00 00 00 ja 0xbc 1a: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 21: fc ff df 24: 49 89 fe mov %rdi,%r14 27: 48 89 fd mov %rdi,%rbp * 2a: eb 0c jmp 0x38 <-- trapping instruction 2c: 48 8d 6b 04 lea 0x4(%rbx),%rbp 30: 49 89 de mov %rbx,%r14 33: 49 39 ec cmp %rbp,%r12 36: 72 4d jb 0x85 38: 4c 89 e0 mov %r12,%rax 3b: 48 29 e8 sub %rbp,%rax 3e: 48 rex.W 3f: 89 .byte 0x89