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: 2591 Comm: syz-executor.5 Not tainted 4.9.194+ #0
task: 000000006b87343d task.stack: 00000000597612df
RIP: 0010:[<ffffffff813c5a6e>]  [<00000000c96a6255>] perf_event_count kernel/events/core.c:3583 [inline]
RIP: 0010:[<ffffffff813c5a6e>]  [<00000000c96a6255>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP: 0010:[<ffffffff813c5a6e>]  [<00000000c96a6255>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
RSP: 0018:ffff8801c97f7038  EFLAGS: 00010207
RAX: 000000000000001b RBX: 0000000000000006 RCX: ffffc9000b72e000
RDX: 0000000000040000 RSI: ffffffff813c5a60 RDI: 00000000000000de
RBP: ffff8801c97f71b0 R08: 1ffff10039e5c7a9 R09: ffffed0039e5c7ab
R10: ffffed0039e5c7aa R11: ffff8801cf2e3d57 R12: ffff8801d86e72c8
R13: ffff8801c97f7348 R14: dffffc0000000000 R15: ffff8801d86e7250
FS:  00007f2d03b69700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002059313f CR3: 00000001c5c72000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff8801d98b5f00 ffff8801c97f7350 ffffed00392fee6a 0000000000000010
 0000000000000004 0000000000000010 ffffed00392fee6d 1ffff100392fee15
 ffff880192287720 ffff8801c97f7368 ffff8801c97f7360 ffff8801c97f7118
Call Trace:
 [<00000000bfce672c>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821
 [<00000000a7c93de7>] __perf_event_output kernel/events/core.c:6093 [inline]
 [<00000000a7c93de7>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106
 [<00000000fe9cb100>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7208
 [<00000000cfd05f94>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7284
 [<00000000a21a47a8>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7317
 [<00000000dd098c90>] do_perf_sw_event kernel/events/core.c:7425 [inline]
 [<00000000dd098c90>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7456
 [<00000000dce60165>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7468
 [<000000007b6e5134>] perf_sw_event include/linux/perf_event.h:1045 [inline]
 [<000000007b6e5134>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1442
 [<0000000097bf18f7>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1464
 [<000000003590a616>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:956
 [<000000008e7249e7>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2929
 [<0000000076a91ce3>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3064
 [<00000000d164f984>] ext4_file_write_iter+0x364/0xcd0 fs/ext4/file.c:165
 [<0000000036ffc470>] new_sync_write fs/read_write.c:498 [inline]
 [<0000000036ffc470>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<000000001d934b3c>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<00000000418ba3d9>] SYSC_write fs/read_write.c:607 [inline]
 [<00000000418ba3d9>] SyS_write+0x121/0x270 fs/read_write.c:599
 [<0000000032231629>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<000000003f485bfa>] 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  [<00000000c96a6255>] perf_event_count kernel/events/core.c:3583 [inline]
RIP  [<00000000c96a6255>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP  [<00000000c96a6255>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
 RSP <ffff8801c97f7038>
---[ end trace 69c7b9b0082b1f62 ]---