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: 30246 Comm: syz-executor.0 Not tainted 4.9.171+ #49
task: 00000000a22b8c7c task.stack: 00000000b36f6ecd
RIP: 0010:[<ffffffff813c030e>]  [<0000000078b42b9b>] perf_event_count kernel/events/core.c:3583 [inline]
RIP: 0010:[<ffffffff813c030e>]  [<0000000078b42b9b>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP: 0010:[<ffffffff813c030e>]  [<0000000078b42b9b>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
RSP: 0018:ffff88017e97eff8  EFLAGS: 00010202
RAX: 000000000000001c RBX: 0000000000000009 RCX: ffffc9000192f000
RDX: 0000000000040000 RSI: ffffffff813c0300 RDI: 00000000000000e1
RBP: ffff88017e97f170 R08: 1ffff10030833df3 R09: ffffed0030833df5
R10: ffffed0030833df4 R11: ffff88018419efa7 R12: ffff88013076fcc8
R13: ffff88017e97f308 R14: dffffc0000000000 R15: ffff88013076fc50
FS:  00007fbea76d8700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002083413f CR3: 000000012a326000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff88017e97f040 ffff88017e97f310 ffffed002fd2fe62 0000000000000010
 0000000000000004 0000000000000010 ffffed002fd2fe65 1ffff1002fd2fe0d
 ffff8801c9636620 ffff88017e97f328 ffff88017e97f320 ffff88017e97f0d8
Call Trace:
 [<000000002bf07f24>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821
 [<00000000c57ee1e2>] __perf_event_output kernel/events/core.c:6093 [inline]
 [<00000000c57ee1e2>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106
 [<00000000f9d371e4>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7208
 [<00000000cf25245b>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7284
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'.
 [<000000009909b981>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7317
 [<00000000f28c7f78>] do_perf_sw_event kernel/events/core.c:7425 [inline]
 [<00000000f28c7f78>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7456
 [<000000003b464a2a>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7468
 [<000000007db4bc05>] perf_sw_event include/linux/perf_event.h:1045 [inline]
 [<000000007db4bc05>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1447
 [<00000000876e62f6>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1469
 [<000000009fad1209>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:951
 [<0000000019c0d2b3>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2929
 [<00000000e642b364>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3064
 [<000000006026b072>] ext4_file_write_iter+0x66e/0xdd0 fs/ext4/file.c:165
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'.
 [<00000000d646efb2>] new_sync_write fs/read_write.c:498 [inline]
 [<00000000d646efb2>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<00000000e55aad93>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<000000007e5e8182>] SYSC_write fs/read_write.c:606 [inline]
 [<000000007e5e8182>] SyS_write+0xdc/0x1c0 fs/read_write.c:598
 [<00000000927b3d6e>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<0000000084a55b89>] 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  [<0000000078b42b9b>] perf_event_count kernel/events/core.c:3583 [inline]
RIP  [<0000000078b42b9b>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP  [<0000000078b42b9b>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
 RSP <ffff88017e97eff8>
---[ end trace d3ad7d26b9faa0b7 ]---