general protection fault in perf_iterate

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-49	general protection fault in perf_iterate_sb	C			1	2016d	1831d	0/3	public: reported C repro on 2019/04/14 08:51
linux-4.14	general protection fault in perf_iterate_sb	syz		error	1	1705d	1705d	0/1	upstream: reported syz repro on 2019/08/18 21:36

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 NOPTI Modules linked in: CPU: 0 PID: 1892 Comm: syz-executor964 Not tainted 4.14.75+ #18 task: ffff8801c9972f00 task.stack: ffff8801c9fa0000 RIP: 0010:__pmu_filter_match kernel/events/core.c:1805 [inline] RIP: 0010:pmu_filter_match kernel/events/core.c:1822 [inline] RIP: 0010:event_filter_match kernel/events/core.c:1833 [inline] RIP: 0010:perf_iterate_sb_cpu kernel/events/core.c:6364 [inline] RIP: 0010:perf_iterate_sb+0x369/0x5d0 kernel/events/core.c:6396 RSP: 0018:ffff8801c9fa7b10 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffff8801c71f8000 RCX: dffffc0000000000 RDX: 00000000000006ef RSI: dffffc0000000000 RDI: 000000000000377b RBP: ffff8801c9fa7b48 R08: 0000000000000000 R09: 0000000000000000 R10: ffff8801c9973730 R11: 0000000000000001 R12: ffff8801db82e8d0 R13: ffff8801c71f8020 R14: ffffffff881ecfb0 R15: 0000000000003683 FS: 0000000001cb4880(0000) GS:ffff8801db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdd9427874 CR3: 00000001c9fb6002 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: perf_event_task+0xe3/0x140 kernel/events/core.c:6634 perf_event_fork+0x18/0x40 kernel/events/core.c:6641 copy_process.part.6+0x33bd/0x6530 kernel/fork.c:1936 copy_process kernel/fork.c:1573 [inline] _do_fork+0x1c2/0xd50 kernel/fork.c:2054 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x43f9da RSP: 002b:00007ffdd9427840 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043f9da RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffdd9427860 R08: 0000000000000764 R09: 0000000001cb4880 R10: 0000000001cb4b50 R11: 0000000000000246 R12: 0000000000000764 R13: 0000000000401f40 R14: 0000000000000000 R15: 0000000000000000 Code: 48 c1 e8 03 80 3c 30 00 0f 85 e2 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 7c 24 78 49 8d bf f8 00 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 c5 01 00 00 4d 8b bf f8 00 00 00 4d 85 ff 74 RIP: __pmu_filter_match kernel/events/core.c:1805 [inline] RSP: ffff8801c9fa7b10 RIP: pmu_filter_match kernel/events/core.c:1822 [inline] RSP: ffff8801c9fa7b10 RIP: event_filter_match kernel/events/core.c:1833 [inline] RSP: ffff8801c9fa7b10 RIP: perf_iterate_sb_cpu kernel/events/core.c:6364 [inline] RSP: ffff8801c9fa7b10 RIP: perf_iterate_sb+0x369/0x5d0 kernel/events/core.c:6396 RSP: ffff8801c9fa7b10 ---[ end trace d83f470b3167ea2e ]---