audit: type=1326 audit(1627788620.549:47): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4835 comm="syz-executor.5" exe="/syz-executor.5" sig=9 arch=c000003e syscall=231 compat=0 ip=0x466609 code=0x0
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4833 at kernel/kthread.c:83 to_kthread kernel/kthread.c:83 [inline]
WARNING: CPU: 1 PID: 4833 at kernel/kthread.c:83 kthread_is_per_cpu+0xc4/0xf0 kernel/kthread.c:519
Modules linked in:
CPU: 1 PID: 4833 Comm: syz-executor.6 Not tainted 5.10.52 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:to_kthread kernel/kthread.c:83 [inline]
RIP: 0010:kthread_is_per_cpu+0xc4/0xf0 kernel/kthread.c:519
Code: 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 2e 4c 8b 23 41 83 e4 01 e8 c9 8d 23 00 44 89 e0 5b 5d 41 5c c3 e8 bc 8d 23 00 <0f> 0b eb 88 e8 33 c6 4e 00 e9 68 ff ff ff e8 39 c6 4e 00 eb 9a 48
RSP: 0018:ffff88803b04f558 EFLAGS: 00010093
RAX: 0000000000000000 RBX: ffff88800dfa1940 RCX: ffffffff811bf6fc
RDX: ffff88800d581940 RSI: ffffffff811bf774 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff88800dfa1940
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800dfa19e8
R13: ffff88803b04f6e0 R14: ffff88803b04f6e0 R15: ffff88800dfa1940
FS:  00000000022b9400(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b11bf7eff8 CR3: 0000000021fa8000 CR4: 0000000000350ee0
Call Trace:
 can_migrate_task+0x90/0xa00 kernel/sched/fair.c:7572
 detach_tasks kernel/sched/fair.c:7720 [inline]
 load_balance+0xa0e/0x2990 kernel/sched/fair.c:9644
 newidle_balance+0x6b9/0xee0 kernel/sched/fair.c:10616
 pick_next_task_fair+0x48/0xb10 kernel/sched/fair.c:7159
 pick_next_task kernel/sched/core.c:4342 [inline]
 __schedule+0x330/0x1e80 kernel/sched/core.c:4493
 schedule+0xcb/0x270 kernel/sched/core.c:4603
 freezable_schedule include/linux/freezer.h:172 [inline]
 futex_wait_queue_me+0x2a7/0x570 kernel/futex.c:2607
 futex_wait+0x1df/0x5d0 kernel/futex.c:2709
 do_futex+0xf86/0x1a50 kernel/futex.c:3735
 __do_sys_futex+0x2bb/0x480 kernel/futex.c:3798
 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466609
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcdbd98248 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 0000000000000032 RCX: 0000000000466609
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf8c
RBP: 000000000056bf8c R08: 00007ffcdbdda090 R09: 0000000000000000
R10: 00007ffcdbd98320 R11: 0000000000000246 R12: 00000000000314c0
R13: 00000000000003e8 R14: 000000000056bf80 R15: 00000000000314be
irq event stamp: 1184
hardirqs last  enabled at (1183): [<ffffffff83c5d424>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
hardirqs last  enabled at (1183): [<ffffffff83c5d424>] _raw_spin_unlock_irqrestore+0x34/0x40 kernel/locking/spinlock.c:191
hardirqs last disabled at (1184): [<ffffffff83c4d9d2>] __schedule+0xfb2/0x1e80 kernel/sched/core.c:4425
softirqs last  enabled at (770): [<ffffffff810889d3>] memcpy include/linux/string.h:399 [inline]
softirqs last  enabled at (770): [<ffffffff810889d3>] fpu__copy+0x173/0x550 arch/x86/kernel/fpu/core.c:241
softirqs last disabled at (768): [<ffffffff81088901>] fpu__copy+0xa1/0x550 arch/x86/kernel/fpu/core.c:229
---[ end trace b7e9719f8f1e49d1 ]---

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