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: 22863 Comm: syz-executor.4 Not tainted 4.9.194+ #0
task: 00000000b2f99fa4 task.stack: 00000000a974409e
RIP: 0010:[<ffffffff813c5a6e>]  [<000000003763d541>] perf_event_count kernel/events/core.c:3583 [inline]
RIP: 0010:[<ffffffff813c5a6e>]  [<000000003763d541>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP: 0010:[<ffffffff813c5a6e>]  [<000000003763d541>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
RSP: 0018:ffff8801d3d47038  EFLAGS: 00010207
RAX: 000000000000001b RBX: 0000000000000006 RCX: ffffc9000b1b0000
RDX: 0000000000040000 RSI: ffffffff813c5a60 RDI: 00000000000000de
RBP: ffff8801d3d471b0 R08: 1ffff10039ca4685 R09: ffffed0039ca4687
R10: ffffed0039ca4686 R11: ffff8801ce523437 R12: ffff8801cd36b2c8
R13: ffff8801d3d47348 R14: dffffc0000000000 R15: ffff8801cd36b250
FS:  00007f6a22752700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000204a913f CR3: 00000001ac38c000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffffffff8100228a ffff8801d3d47350 ffffed003a7a8e6a 0000000000000010
 0000000000000004 0000000000000010 ffffed003a7a8e6d 1ffff1003a7a8e15
 ffff8801a69288a0 ffff8801d3d47368 ffff8801d3d47360 ffff8801d3d47118
Call Trace:
 [<0000000010976006>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821
 [<000000009ce5ac1d>] __perf_event_output kernel/events/core.c:6093 [inline]
 [<000000009ce5ac1d>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106
 [<0000000041a51403>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7208
 [<000000007d64f8ad>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7284
 [<00000000f5beb2aa>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7317
 [<000000008e9433b5>] do_perf_sw_event kernel/events/core.c:7425 [inline]
 [<000000008e9433b5>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7456
 [<00000000a564b401>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7468
 [<00000000e85e8580>] perf_sw_event include/linux/perf_event.h:1045 [inline]
 [<00000000e85e8580>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1442
 [<0000000075f08f33>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1464
 [<00000000bdc531e3>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:956
 [<000000004c10dac9>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2929
 [<00000000c1b9ea83>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3064
 [<00000000914cdf14>] ext4_file_write_iter+0x364/0xcd0 fs/ext4/file.c:165
 [<00000000ba968f09>] new_sync_write fs/read_write.c:498 [inline]
 [<00000000ba968f09>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<000000007de1ce5a>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<00000000b8e82ecc>] SYSC_write fs/read_write.c:607 [inline]
 [<00000000b8e82ecc>] SyS_write+0x121/0x270 fs/read_write.c:599
 [<000000003415e920>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<000000001d123604>] 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  [<000000003763d541>] perf_event_count kernel/events/core.c:3583 [inline]
RIP  [<000000003763d541>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP  [<000000003763d541>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
 RSP <ffff8801d3d47038>
---[ end trace e5b61544eed06f6e ]---