------------[ cut here ]------------
WARNING: CPU: 1 PID: 28464 at kernel/sched/sched.h:1132 rq_clock_task kernel/sched/sched.h:1132 [inline]
WARNING: CPU: 1 PID: 28464 at kernel/sched/sched.h:1132 update_curr+0x295/0x8a0 kernel/sched/fair.c:847
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 28464 Comm: syz-executor.4 Not tainted 5.7.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:105 [inline]
 fixup_bug arch/x86/kernel/traps.c:100 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:197
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:216
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:rq_clock_task kernel/sched/sched.h:1132 [inline]
RIP: 0010:update_curr+0x295/0x8a0 kernel/sched/fair.c:847
Code: 80 3c 02 00 0f 85 69 05 00 00 4c 01 65 20 e9 af fe ff ff 49 8d 7c 24 18 be ff ff ff ff e8 63 fc 87 06 85 c0 0f 85 04 fe ff ff <0f> 0b e9 fd fd ff ff 4c 8d 73 80 0f 1f 44 00 00 65 44 8b 2d 13 5f
RSP: 0018:ffffc90000da8d88 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffff8880ae637dd8 RDI: 0000000000000082
RBP: ffff8880ae637e80 R08: 0000000000000000 R09: fffffbfff1334543
R10: ffffffff899a2a17 R11: 0000000000000000 R12: ffff8880ae637dc0
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880a1948380
 enqueue_entity+0x1eb/0x1850 kernel/sched/fair.c:4190
 enqueue_task_fair+0x1a0/0x1a40 kernel/sched/fair.c:5485
 enqueue_task kernel/sched/core.c:1295 [inline]
 activate_task+0x10d/0x3f0 kernel/sched/core.c:1317
 ttwu_do_activate+0xca/0x130 kernel/sched/core.c:2247
 sched_ttwu_pending+0x16f/0x200 kernel/sched/core.c:2297
 flush_smp_call_function_queue+0x409/0x6e0 kernel/smp.c:314
 smp_call_function_single_interrupt+0xb1/0x4b0 arch/x86/kernel/smp.c:262
 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:851
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x8c/0xe0 kernel/locking/spinlock.c:191
Code: 48 c7 c0 c0 ae 94 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d 0b 8e b6 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 15 72 71 f9 65 8b 05 f6 fd 23 78
RSP: 0018:ffffc90017f47da0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff04
RAX: 1ffffffff13295d8 RBX: 0000000000000282 RCX: 1ffffffff15173ba
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000282
RBP: ffff8880a2c6a030 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: fffffffffffffffb
R13: 00000000200000c0 R14: 0000000000000008 R15: ffff8880528bc600
 ldsem_up_read+0x6f/0x80 drivers/tty/tty_ldsem.c:397
 tty_read+0x19b/0x290 drivers/tty/tty_io.c:872
 __vfs_read+0x76/0x100 fs/read_write.c:426
 vfs_read+0x1f0/0x420 fs/read_write.c:462
 ksys_read+0x12d/0x250 fs/read_write.c:588
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca59
Code: 0d b7 fb 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f08e2c1fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00000000004fb660 RCX: 000000000045ca59
RDX: 0000000000000008 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000892 R14: 00000000004ca1ca R15: 00007f08e2c206d4

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