netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 4 bytes leftover after parsing attributes in process `syz-executor.5'.
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: 27908 Comm: syz-executor.1 Not tainted 4.9.168+ #40
task: 00000000008573eb task.stack: 0000000000f2ed0c
RIP: 0010:[<ffffffff813c010e>]  [<000000007c80e1bb>] perf_event_count kernel/events/core.c:3583 [inline]
RIP: 0010:[<ffffffff813c010e>]  [<000000007c80e1bb>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP: 0010:[<ffffffff813c010e>]  [<000000007c80e1bb>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
RSP: 0018:ffff8801ca096ff8  EFLAGS: 00010202
RAX: 000000000000001c RBX: 0000000000000009 RCX: ffffc90000140000
RDX: 0000000000040000 RSI: ffffffff813c0100 RDI: 00000000000000e1
RBP: ffff8801ca097170 R08: 1ffff1003942fdc5 R09: ffffed003942fdc7
R10: ffffed003942fdc6 R11: ffff8801ca17ee37 R12: ffff8801c526d2c8
R13: ffff8801ca097308 R14: dffffc0000000000 R15: ffff8801c526d250
FS:  00007fd71dee3700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020da813f CR3: 00000001c6473000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffff8801ca097040 ffff8801ca097310 ffffed0039412e62 0000000000000010
 0000000000000004 0000000000000010 ffffed0039412e65 1ffff10039412e0d
 ffff8801d5245da0 ffff8801ca097328 ffff8801ca097320 ffff8801ca0970d8
Call Trace:
 [<000000005fe90eb7>] perf_output_sample+0x1142/0x17e0 kernel/events/core.c:5821
 [<00000000176570f3>] __perf_event_output kernel/events/core.c:6093 [inline]
 [<00000000176570f3>] perf_event_output_forward+0x129/0x240 kernel/events/core.c:6106
 [<00000000e186ea85>] __perf_event_overflow+0x121/0x330 kernel/events/core.c:7206
 [<000000000f90d0b7>] perf_swevent_overflow+0x17c/0x210 kernel/events/core.c:7282
 [<00000000c6d3914b>] perf_swevent_event+0x1ac/0x280 kernel/events/core.c:7315
 [<00000000276c7e6a>] do_perf_sw_event kernel/events/core.c:7423 [inline]
 [<00000000276c7e6a>] ___perf_sw_event+0x299/0x4c0 kernel/events/core.c:7454
 [<000000007ea373c3>] __perf_sw_event+0x47/0x90 kernel/events/core.c:7466
 [<00000000e0a59972>] perf_sw_event include/linux/perf_event.h:1045 [inline]
 [<00000000e0a59972>] __do_page_fault+0x6cd/0xa60 arch/x86/mm/fault.c:1447
 [<00000000012936b7>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1469
 [<00000000648e49ad>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:951
 [<0000000028414255>] generic_perform_write+0x1b6/0x500 mm/filemap.c:2929
 [<00000000418a6535>] __generic_file_write_iter+0x340/0x530 mm/filemap.c:3064
 [<0000000061b71c53>] ext4_file_write_iter+0x66e/0xdd0 fs/ext4/file.c:165
 [<000000002c78fa5c>] new_sync_write fs/read_write.c:498 [inline]
 [<000000002c78fa5c>] __vfs_write+0x3c1/0x560 fs/read_write.c:511
 [<00000000eb68a084>] vfs_write+0x185/0x520 fs/read_write.c:559
 [<000000001c1dab1b>] SYSC_write fs/read_write.c:606 [inline]
 [<000000001c1dab1b>] SyS_write+0xdc/0x1c0 fs/read_write.c:598
 [<00000000b8ede0e4>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<0000000021097b1d>] 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 60 cf 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  [<000000007c80e1bb>] perf_event_count kernel/events/core.c:3583 [inline]
RIP  [<000000007c80e1bb>] perf_output_read_group kernel/events/core.c:5742 [inline]
RIP  [<000000007c80e1bb>] perf_output_read+0x63e/0x12e0 kernel/events/core.c:5779
 RSP <ffff8801ca096ff8>
---[ end trace c42435f5436cd0bb ]---