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: 18858 Comm: syz-executor.1 Not tainted 4.9.170+ #48
task: 00000000e6666b37 task.stack: 0000000010e03f2d
RIP: 0010:[<ffffffff813c02ce>]  [<0000000065d9f321>] perf_event_count kernel/events/core.c:3583 [inline]
RIP: 0010:[<ffffffff813c02ce>]  [<0000000065d9f321>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP: 0010:[<ffffffff813c02ce>]  [<0000000065d9f321>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
RSP: 0018:ffff88018974eff8  EFLAGS: 00010202
RAX: 000000000000001c RBX: 0000000000000009 RCX: ffffc90000f62000
RDX: 0000000000040000 RSI: ffffffff813c02c0 RDI: 00000000000000e1
RBP: ffff88018974f170 R08: 1ffff1002e601c69 R09: ffffed002e601c6b
R10: ffffed002e601c6a R11: ffff88017300e357 R12: ffff880192b71cc8
R13: ffff88018974f308 R14: dffffc0000000000 R15: ffff880192b71c50
FS:  00007f5535037700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002077313f CR3: 00000001a002b000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff88021fffd010 ffff88018974f310 ffffed00312e9e62 0000000000000010
 0000000000000004 0000000000000010 ffffed00312e9e65 1ffff100312e9e0d
 ffff8801c7da2220 ffff88018974f328 ffff88018974f320 ffff88018974f0d8
Call Trace:
 [<00000000a3e52fc8>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821
 [<00000000c68c4f0b>] __perf_event_output kernel/events/core.c:6093 [inline]
 [<00000000c68c4f0b>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106
 [<000000003ec8123e>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7208
 [<000000000fe7f648>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7284
 [<00000000a534afc6>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7317
 [<000000009088b98b>] do_perf_sw_event kernel/events/core.c:7425 [inline]
 [<000000009088b98b>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7456
 [<0000000094f64eee>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7468
 [<000000005ee3b8cd>] perf_sw_event include/linux/perf_event.h:1045 [inline]
 [<000000005ee3b8cd>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1447
 [<000000006216be63>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1469
 [<00000000a324681b>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:951
 [<0000000048a8c8da>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2929
 [<00000000aadaa779>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3064
 [<0000000025cb6126>] ext4_file_write_iter+0x66e/0xdd0 fs/ext4/file.c:165
 [<00000000cc861754>] new_sync_write fs/read_write.c:498 [inline]
 [<00000000cc861754>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<0000000083d9d481>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<0000000019a24171>] SYSC_write fs/read_write.c:606 [inline]
 [<0000000019a24171>] SyS_write+0xdc/0x1c0 fs/read_write.c:598
 [<0000000003d27d21>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<00000000f5b4a41c>] 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 f0 ce 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  [<0000000065d9f321>] perf_event_count kernel/events/core.c:3583 [inline]
RIP  [<0000000065d9f321>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP  [<0000000065d9f321>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
 RSP <ffff88018974eff8>
---[ end trace 07cc5155166e1f66 ]---