kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN PTI
CPU: 3 PID: 25649 Comm: syz-executor.6 Not tainted 5.10 #12
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:__read_once_size include/linux/compiler.h:207 [inline]
RIP: 0010:dequeue_load_avg kernel/sched/fair.c:2890 [inline]
RIP: 0010:reweight_entity+0x9b/0xc90 kernel/sched/fair.c:2914
Code: 03 80 3c 02 00 0f 85 90 0a 00 00 4c 8d 85 a0 00 00 00 4c 8b b3 a0 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 c2 48 c1 ea 03 <80> 3c 02 00 0f 85 76 08 00 00 48 8b 85 a0 00 00 00 ba 00 00 00 00
RSP: 0018:ffff888131207d50 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: ffff8881311fdf00 RCX: ffff8881311fe0a0
RDX: 0000000000000014 RSI: ffff8881311fdf00 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000000000a0 R09: ffff8881311fdf40
R10: ffff8881311fdf10 R11: ffff8881311fe0a8 R12: 0000000000003c00
R13: 0000000000003c00 R14: 0000000000000334 R15: ffff8881311fdee8
FS: 00007f0873a30700(0000) GS:ffff8883e2f80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0873a306d0 CR3: 0000000118a86005 CR4: 00000000003606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 reweight_task+0xbe/0x1e0 kernel/sched/fair.c:2943
 set_user_nice+0x1d8/0x710 kernel/sched/core.c:3985
 set_one_prio+0x1dd/0x250 kernel/sys.c:188
 __do_sys_setpriority+0x262/0x710 kernel/sys.c:229
 do_syscall_64+0xc7/0x280 arch/x86/entry/common.c:298
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x46bb29
Code: 5d db fa ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b db fa ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f0873a2fc48 EFLAGS: 00000246 ORIG_RAX: 000000000000008d
RAX: ffffffffffffffda RBX: 000000000077bf60 RCX: 000000000046bb29
RDX: 0000000000000097 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000000077bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff7f1e7bff R14: 00007f0873a309c0 R15: 00007fff7f1e7d90
Modules linked in:
---[ end trace 11b56ac78d31a2b7 ]---
RIP: 0010:__read_once_size include/linux/compiler.h:207 [inline]
RIP: 0010:dequeue_load_avg kernel/sched/fair.c:2890 [inline]
RIP: 0010:reweight_entity+0x9b/0xc90 kernel/sched/fair.c:2914
Code: 03 80 3c 02 00 0f 85 90 0a 00 00 4c 8d 85 a0 00 00 00 4c 8b b3 a0 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 c2 48 c1 ea 03 <80> 3c 02 00 0f 85 76 08 00 00 48 8b 85 a0 00 00 00 ba 00 00 00 00
RSP: 0018:ffff888131207d50 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: ffff8881311fdf00 RCX: ffff8881311fe0a0
RDX: 0000000000000014 RSI: ffff8881311fdf00 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000000000a0 R09: ffff8881311fdf40
R10: ffff8881311fdf10 R11: ffff8881311fe0a8 R12: 0000000000003c00
R13: 0000000000003c00 R14: 0000000000000334 R15: ffff8881311fdee8
FS: 00007f0873a30700(0000) GS:ffff8883e2f80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0873a306d0 CR3: 0000000118a86005 CR4: 00000000003606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	03 80 3c 02 00 0f add 0xf00023c(%rax),%eax
   6:	85 90 0a 00 00 4c test %edx,0x4c00000a(%rax)
   c:	8d 85 a0 00 00 00 lea 0xa0(%rbp),%eax
  12:	4c 8b b3 a0 01 00 00 mov 0x1a0(%rbx),%r14
  19:	48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	4c 89 c2 mov %r8,%rdx
  26:	48 c1 ea 03 shr $0x3,%rdx
* 2a:	80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 76 08 00 00 jne 0x8aa
  34:	48 8b 85 a0 00 00 00 mov 0xa0(%rbp),%rax
  3b:	ba 00 00 00 00 mov $0x0,%edx