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: 2330 Comm: syz-executor.2 Not tainted 4.9.180+ #4
task: 0000000056273b49 task.stack: 00000000742c8575
RIP: 0010:[<ffffffff813c3f5e>]  [<00000000be8cc5be>] perf_event_count kernel/events/core.c:3583 [inline]
RIP: 0010:[<ffffffff813c3f5e>]  [<00000000be8cc5be>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP: 0010:[<ffffffff813c3f5e>]  [<00000000be8cc5be>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
RSP: 0018:ffff8801cda7f038  EFLAGS: 00010203
RAX: 000000000000001c RBX: 000000000000000c RCX: ffffc9000211a000
RDX: 0000000000040000 RSI: ffffffff813c3f50 RDI: 00000000000000e4
RBP: ffff8801cda7f1b0 R08: 1ffff1003aee447f R09: ffffed003aee4481
R10: ffffed003aee4480 R11: ffff8801d7722407 R12: ffff8801d8660648
R13: ffff8801cda7f348 R14: dffffc0000000000 R15: ffff8801d86605d0
FS:  00007fc3c0c84700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002064513f CR3: 00000001cdbf5000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff8801cda7f1e0 ffff8801cda7f350 ffffed0039b4fe6a 0000000000000010
 0000000000000004 0000000000000010 ffffed0039b4fe6d 1ffff10039b4fe15
 ffff8801cebaa220 ffff8801cda7f368 ffff8801cda7f360 ffff8801cda7f118
Call Trace:
 [<00000000208da1eb>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821
 [<000000000cca653e>] __perf_event_output kernel/events/core.c:6093 [inline]
 [<000000000cca653e>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106
 [<000000001e1401f9>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7208
 [<000000008ad80bdc>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7284
 [<0000000027f6f45b>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7317
 [<0000000098c48c84>] do_perf_sw_event kernel/events/core.c:7425 [inline]
 [<0000000098c48c84>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7456
 [<00000000232e3de9>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7468
 [<000000007b7fb8c9>] perf_sw_event include/linux/perf_event.h:1045 [inline]
 [<000000007b7fb8c9>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1445
 [<00000000fec3e158>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1467
 [<0000000052298118>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:953
 [<00000000ebea1f3e>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2929
 [<00000000d9a5dae6>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3064
 [<00000000747f60ae>] ext4_file_write_iter+0x364/0xcd0 fs/ext4/file.c:165
 [<00000000fe9381f8>] new_sync_write fs/read_write.c:498 [inline]
 [<00000000fe9381f8>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<00000000e0372e73>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<00000000821aa034>] SYSC_write fs/read_write.c:606 [inline]
 [<00000000821aa034>] SyS_write+0xdc/0x1c0 fs/read_write.c:598
 [<00000000dd5b85ad>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<00000000278d4bd3>] 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 40 cd 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  [<00000000be8cc5be>] perf_event_count kernel/events/core.c:3583 [inline]
RIP  [<00000000be8cc5be>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP  [<00000000be8cc5be>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
 RSP <ffff8801cda7f038>
---[ end trace 6c96a0ecd72ac3c7 ]---