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: 23955 Comm: syz-executor.1 Not tainted 4.9.203-syzkaller #0
task: 00000000bc336d8e task.stack: 00000000fa4228e4
RIP: 0010:[<ffffffff813c5b8e>]  [<000000002154401a>] perf_event_count kernel/events/core.c:3583 [inline]
RIP: 0010:[<ffffffff813c5b8e>]  [<000000002154401a>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP: 0010:[<ffffffff813c5b8e>]  [<000000002154401a>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
RSP: 0018:ffff8801c8207038  EFLAGS: 00010206
RAX: 000000000000001d RBX: 0000000000000010 RCX: ffffc90002b10000
RDX: 0000000000040000 RSI: ffffffff813c5b80 RDI: 00000000000000e8
RBP: ffff8801c82071b0 R08: 1ffff10039e0e33a R09: ffffed0039e0e33c
R10: ffffed0039e0e33b R11: ffff8801cf0719df R12: ffff8801d3bd6648
R13: ffff8801c8207348 R14: dffffc0000000000 R15: ffff8801d3bd65d0
FS:  00007fd0f9bb5700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020b990ff CR3: 00000001d616a000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801c82071e0 ffff8801c8207350 ffffed0039040e6a 0000000000000010
 0000000000000004 0000000000000010 ffffed0039040e6d 1ffff10039040e15
 ffff8801a416d520 ffff8801c8207368 ffff8801c8207360 ffff8801c8207118
Call Trace:
 [<000000002956a6e1>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821
 [<00000000e39ed56e>] __perf_event_output kernel/events/core.c:6093 [inline]
 [<00000000e39ed56e>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106
 [<00000000b3fa26d6>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7208
 [<0000000041c35785>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7284
 [<00000000c00b7e56>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7317
 [<0000000079bebf2c>] do_perf_sw_event kernel/events/core.c:7425 [inline]
 [<0000000079bebf2c>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7456
 [<000000006371d076>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7468
 [<000000005b7faf3b>] perf_sw_event include/linux/perf_event.h:1045 [inline]
 [<000000005b7faf3b>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1442
 [<0000000032765ebb>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1464
 [<00000000b554f2f2>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:956
 [<000000000175f356>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2930
 [<00000000b6652600>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3065
 [<000000004865e9ca>] ext4_file_write_iter+0x364/0xcd0 fs/ext4/file.c:165
 [<00000000593d6f3d>] new_sync_write fs/read_write.c:498 [inline]
 [<00000000593d6f3d>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<00000000978a115d>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<00000000eb84ec29>] SYSC_write fs/read_write.c:607 [inline]
 [<00000000eb84ec29>] SyS_write+0x121/0x270 fs/read_write.c:599
 [<00000000dbc066b4>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<00000000f965e252>] 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 b0 cb 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  [<000000002154401a>] perf_event_count kernel/events/core.c:3583 [inline]
RIP  [<000000002154401a>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP  [<000000002154401a>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
 RSP <ffff8801c8207038>
---[ end trace 7105eda3bff64c2d ]---