kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 8834 Comm: syz-executor3 Not tainted 4.9.155+ #26 task: ffff8801d6f197c0 task.stack: ffff8801851c8000 RIP: 0010:[] [] perf_event_count kernel/events/core.c:3583 [inline] RIP: 0010:[] [] perf_output_read_group kernel/events/core.c:5734 [inline] RIP: 0010:[] [] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5771 RSP: 0018:ffff8801851cf278 EFLAGS: 00010207 RAX: 000000000000001b RBX: 0000000000000007 RCX: ffffc90000098000 RDX: 0000000000040000 RSI: ffffffff813be240 RDI: 00000000000000df RBP: ffff8801851cf3f0 R08: 1ffff10031326c8f R09: ffffed0031326c90 R10: ffffed0031326c8f R11: ffff88018993647f R12: ffff88016fecd048 R13: ffff8801851cf588 R14: dffffc0000000000 R15: ffff88016feccfd0 FS: 00007f939717c700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020752000 CR3: 00000001cd408000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Stack: ffffffff813c4479 ffff8801851cf590 ffffed0030a39eb2 0000000000000008 0000000000000000 0000000000000008 ffffed0030a39eb5 1ffff10030a39e5d ffff8801c51899a0 ffff8801851cf5a8 ffff8801851cf5a0 ffff8801851cf358 Call Trace: [] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5813 [] __perf_event_output kernel/events/core.c:6085 [inline] [] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6098 [] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7198 [] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7274 [] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7307 [] do_perf_sw_event kernel/events/core.c:7415 [inline] [] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7446 [] __perf_sw_event+0x47/0x90 kernel/events/core.c:7458 [] perf_sw_event include/linux/perf_event.h:1040 [inline] [] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1447 [] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1469 [] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:951 [] pipe_write+0x25a/0xe40 fs/pipe.c:433 [] new_sync_write fs/read_write.c:498 [inline] [] __vfs_write+0x3c1/0x560 fs/read_write.c:511 [] vfs_write+0x185/0x520 fs/read_write.c:559 [] SYSC_write fs/read_write.c:606 [inline] [] SyS_write+0xdc/0x1c0 fs/read_write.c:598 [] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: 74 08 3c 03 0f 8e 55 0a 00 00 41 83 bf 88 00 00 00 01 0f 84 09 07 00 00 e8 e0 d2 f5 ff 48 8d bb d8 00 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 15 0a 00 00 48 8b 9b d8 00 00 00 48 85 db RIP [] perf_event_count kernel/events/core.c:3583 [inline] RIP [] perf_output_read_group kernel/events/core.c:5734 [inline] RIP [] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5771 RSP ---[ end trace 406aab5afbdb90fc ]---