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: 1 PID: 7205 Comm: syz-executor.2 Not tainted 4.9.181+ #8
task: 0000000066c1b70e task.stack: 00000000d10d183d
RIP: 0010:[<ffffffff813c423e>]  [<00000000f43a3cf5>] perf_event_count kernel/events/core.c:3583 [inline]
RIP: 0010:[<ffffffff813c423e>]  [<00000000f43a3cf5>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP: 0010:[<ffffffff813c423e>]  [<00000000f43a3cf5>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
RSP: 0018:ffff88017f69f038  EFLAGS: 00010202
RAX: 000000000000001c RBX: 0000000000000009 RCX: ffffc90001b30000
RDX: 0000000000040000 RSI: ffffffff813c4230 RDI: 00000000000000e1
RBP: ffff88017f69f1b0 R08: 1ffff1003576bc15 R09: ffffed003576bc17
R10: ffffed003576bc16 R11: ffff8801abb5e0b7 R12: ffff8801a66443c8
R13: ffff88017f69f348 R14: dffffc0000000000 R15: ffff8801a6644350
FS:  00007f2d2b6f2700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002048613f CR3: 0000000182975000 CR4: 00000000001606b0
Stack:
 ffff88017f69f1e0 ffff88017f69f350 ffffed002fed3e6a 0000000000000010
 0000000000000004 0000000000000010 ffffed002fed3e6d 1ffff1002fed3e15
 ffff880193a15da0 ffff88017f69f368 ffff88017f69f360 ffff88017f69f118
Call Trace:
 [<000000004628503a>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821
 [<0000000079b98645>] __perf_event_output kernel/events/core.c:6093 [inline]
 [<0000000079b98645>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106
 [<00000000ac539787>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7208
 [<0000000007e269fb>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7284
 [<000000002f257cb0>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7317
 [<00000000daed469e>] do_perf_sw_event kernel/events/core.c:7425 [inline]
 [<00000000daed469e>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7456
 [<000000002f6413c3>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7468
 [<00000000fef834ec>] perf_sw_event include/linux/perf_event.h:1045 [inline]
 [<00000000fef834ec>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1445
 [<000000001a478780>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1467
 [<000000003b2a3448>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:953
 [<00000000f8f75bc9>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2929
 [<00000000cad4c2f1>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3064
 [<00000000fc0310a0>] ext4_file_write_iter+0x364/0xcd0 fs/ext4/file.c:165
 [<0000000056a2cb89>] new_sync_write fs/read_write.c:498 [inline]
 [<0000000056a2cb89>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<00000000dde0f56c>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<0000000033b19ef7>] SYSC_write fs/read_write.c:607 [inline]
 [<0000000033b19ef7>] SyS_write+0x121/0x270 fs/read_write.c:599
 [<00000000b31443fe>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<000000000225f234>] 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 a0 cc 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  [<00000000f43a3cf5>] perf_event_count kernel/events/core.c:3583 [inline]
RIP  [<00000000f43a3cf5>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP  [<00000000f43a3cf5>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
 RSP <ffff88017f69f038>
---[ end trace 57b198cd055b74b1 ]---