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: 16104 Comm: syz-executor.5 Not tainted 4.9.180+ #3
task: 000000006252402e task.stack: 00000000ca199a85
RIP: 0010:[<ffffffff813c3f5e>]  [<000000004fdcdcfc>] perf_event_count kernel/events/core.c:3583 [inline]
RIP: 0010:[<ffffffff813c3f5e>]  [<000000004fdcdcfc>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP: 0010:[<ffffffff813c3f5e>]  [<000000004fdcdcfc>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
RSP: 0018:ffff88019abe7038  EFLAGS: 00010207
RAX: 000000000000001b RBX: 0000000000000006 RCX: ffffc9000091f000
RDX: 0000000000040000 RSI: ffffffff813c3f50 RDI: 00000000000000de
RBP: ffff88019abe71b0 R08: 1ffff1002fc7fd01 R09: ffffed002fc7fd03
R10: ffffed002fc7fd02 R11: ffff88017e3fe817 R12: ffff8801a64aa148
R13: ffff88019abe7348 R14: dffffc0000000000 R15: ffff8801a64aa0d0
FS:  00007f2c4d66e700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020ced13f CR3: 00000001d9f21000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Stack:
 ffff88019abe71e0 ffff88019abe7350 ffffed003357ce6a 0000000000000010
 0000000000000004 0000000000000010 ffffed003357ce6d 1ffff1003357ce15
 ffff8801ca2d7720 ffff88019abe7368 ffff88019abe7360 ffff88019abe7118
Call Trace:
 [<000000002ef0041d>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821
 [<00000000a14007b9>] __perf_event_output kernel/events/core.c:6093 [inline]
 [<00000000a14007b9>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106
 [<00000000da5f77b9>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7208
 [<000000002a9a3549>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7284
 [<000000003ffdfc1a>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7317
 [<00000000e2c06b9e>] do_perf_sw_event kernel/events/core.c:7425 [inline]
 [<00000000e2c06b9e>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7456
 [<00000000e590a4fe>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7468
 [<00000000a2b59da9>] perf_sw_event include/linux/perf_event.h:1045 [inline]
 [<00000000a2b59da9>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1445
 [<0000000031f5af7c>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1467
 [<00000000d522fceb>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:953
 [<00000000a285b93b>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2929
 [<00000000ea840d9c>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3064
 [<000000009a0b4fb5>] ext4_file_write_iter+0x364/0xcd0 fs/ext4/file.c:165
 [<0000000034b5709a>] new_sync_write fs/read_write.c:498 [inline]
 [<0000000034b5709a>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<0000000023e7ea5c>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<00000000712eb676>] SYSC_write fs/read_write.c:606 [inline]
 [<00000000712eb676>] SyS_write+0xdc/0x1c0 fs/read_write.c:598
 [<00000000f7543f13>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<00000000731429e5>] 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  [<000000004fdcdcfc>] perf_event_count kernel/events/core.c:3583 [inline]
RIP  [<000000004fdcdcfc>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP  [<000000004fdcdcfc>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
 RSP <ffff88019abe7038>
---[ end trace fcad663a1ff95c24 ]---