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: 25831 Comm: syz-executor.2 Not tainted 4.9.180+ #3
task: 000000006de46e90 task.stack: 000000007d8a2474
RIP: 0010:[<ffffffff813c3f5e>]  [<0000000085830ddf>] perf_event_count kernel/events/core.c:3583 [inline]
RIP: 0010:[<ffffffff813c3f5e>]  [<0000000085830ddf>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP: 0010:[<ffffffff813c3f5e>]  [<0000000085830ddf>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
RSP: 0018:ffff880170097038  EFLAGS: 00010202
RAX: 000000000000001c RBX: 0000000000000009 RCX: ffffc9000615b000
RDX: 0000000000040000 RSI: ffffffff813c3f50 RDI: 00000000000000e1
RBP: ffff8801700971b0 R08: 1ffff10036e219e1 R09: ffffed0036e219e3
R10: ffffed0036e219e2 R11: ffff8801b710cf17 R12: ffff880187f063c8
R13: ffff880170097348 R14: dffffc0000000000 R15: ffff880187f06350
FS:  00007f5084537700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000206ff13f CR3: 00000001bd1ab000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Stack:
 ffff8801700971e0 ffff880170097350 ffffed002e012e6a 0000000000000010
 0000000000000004 0000000000000010 ffffed002e012e6d 1ffff1002e012e15
 ffff880189d02220 ffff880170097368 ffff880170097360 ffff880170097118
Call Trace:
 [<00000000849303e2>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821
 [<00000000e2d3ad91>] __perf_event_output kernel/events/core.c:6093 [inline]
 [<00000000e2d3ad91>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106
 [<00000000afa8fd36>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7208
 [<00000000baaacc0d>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7284
 [<00000000fe22163c>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7317
 [<00000000249c450b>] do_perf_sw_event kernel/events/core.c:7425 [inline]
 [<00000000249c450b>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7456
 [<000000001e165d2b>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7468
 [<0000000086c7b325>] perf_sw_event include/linux/perf_event.h:1045 [inline]
 [<0000000086c7b325>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1445
 [<00000000e0cea700>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1467
 [<00000000d80f5795>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:953
 [<000000000f2ffd3b>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2929
 [<00000000145e2103>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3064
 [<00000000164c1c14>] ext4_file_write_iter+0x364/0xcd0 fs/ext4/file.c:165
 [<00000000e583df7c>] new_sync_write fs/read_write.c:498 [inline]
 [<00000000e583df7c>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<000000006781764f>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<000000001d77ec26>] SYSC_write fs/read_write.c:606 [inline]
 [<000000001d77ec26>] SyS_write+0xdc/0x1c0 fs/read_write.c:598
 [<00000000cfe5b32a>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<00000000fb759cb9>] 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  [<0000000085830ddf>] perf_event_count kernel/events/core.c:3583 [inline]
RIP  [<0000000085830ddf>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP  [<0000000085830ddf>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
 RSP <ffff880170097038>
---[ end trace 80268df6e081fd3a ]---