sched: DL replenish lagged too much
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6690 at kernel/rcu/tree_stall.h:989 rcu_check_gp_start_stall+0x2cf/0x460 kernel/rcu/tree_stall.h:989
Modules linked in:
CPU: 1 UID: 0 PID: 6690 Comm: syz.0.214 Not tainted 6.13.0-rc2-syzkaller-00040-g6e8ba494d87d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:rcu_check_gp_start_stall+0x2cf/0x460 kernel/rcu/tree_stall.h:989
Code: c7 60 bb 3e 9a be 04 00 00 00 e8 1c 25 80 00 b8 01 00 00 00 87 05 51 12 b9 18 85 c0 0f 85 1a ff ff ff 48 c7 c0 80 c8 93 8e 90 <0f> 0b 90 49 39 c7 74 47 48 c7 c0 90 98 19 90 48 c1 e8 03 42 0f b6
RSP: 0018:ffffc90000a18bb8 EFLAGS: 00010046
RAX: ffffffff8e93c880 RBX: 00000000ffffd840 RCX: ffffffff8185a904
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff9a3ebb60
RBP: ffffc90000a18e10 R08: 0000000000000003 R09: fffffbfff347d76c
R10: dffffc0000000000 R11: fffffbfff347d76c R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000246 R15: ffffffff8e93c880
FS:  000055557464e500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 000000002970a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_core+0x650/0x17a0 kernel/rcu/tree.c:2818
 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:655
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:671
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:rcu_read_unlock_special+0x88/0x570 kernel/rcu/tree_plugin.h:693
Code: f1 f1 f1 00 f2 f2 f2 49 89 04 14 66 41 c7 44 14 09 f3 f3 41 c6 44 14 0b f3 65 44 8b 3d 89 f9 7d 7e 41 f7 c7 00 00 f0 00 74 49 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 22 00 00 00 00 66 42 c7 44 22
RSP: 0018:ffffc90005a97c20 EFLAGS: 00000206
RAX: 200e42fdb4d0b400 RBX: 1ffff92000b52f8c RCX: ffffffff817b11ca
RDX: dffffc0000000000 RSI: ffffffff8c0a9760 RDI: ffffffff8c5f9940
RBP: ffffc90005a97cf8 R08: ffffffff942a18bf R09: 1ffffffff2854317
R10: dffffc0000000000 R11: fffffbfff2854318 R12: 1ffff92000b52f88
R13: ffff88802fd5de60 R14: ffffc90005a97c60 R15: 0000000000000000
 __rcu_read_unlock+0xa1/0x110 kernel/rcu/tree_plugin.h:437
 dput+0x197/0x2b0 fs/dcache.c:866
 __fput+0x5ba/0xa50 fs/file_table.c:458
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f25bf57ff19
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffefecd088 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00000000000173b3 RCX: 00007f25bf57ff19
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f25bf747ba0 R08: 0000000000000001 R09: 00007fffefecd36f
R10: 00007f25bf400000 R11: 0000000000000246 R12: 00000000000175f0
R13: 00007f25bf746080 R14: 0000000000000226 R15: ffffffffffffffff
 </TASK>
----------------
Code disassembly (best guess):
   0:	f1                   	int1
   1:	f1                   	int1
   2:	f1                   	int1
   3:	00 f2                	add    %dh,%dl
   5:	f2 f2 49 89 04 14    	repnz repnz mov %rax,(%r12,%rdx,1)
   b:	66 41 c7 44 14 09 f3 	movw   $0xf3f3,0x9(%r12,%rdx,1)
  12:	f3
  13:	41 c6 44 14 0b f3    	movb   $0xf3,0xb(%r12,%rdx,1)
  19:	65 44 8b 3d 89 f9 7d 	mov    %gs:0x7e7df989(%rip),%r15d        # 0x7e7df9aa
  20:	7e
  21:	41 f7 c7 00 00 f0 00 	test   $0xf00000,%r15d
  28:	74 49                	je     0x73
* 2a:	48 c7 44 24 20 0e 36 	movq   $0x45e0360e,0x20(%rsp) <-- trapping instruction
  31:	e0 45
  33:	4a c7 04 22 00 00 00 	movq   $0x0,(%rdx,%r12,1)
  3a:	00
  3b:	66                   	data16
  3c:	42                   	rex.X
  3d:	c7                   	.byte 0xc7
  3e:	44                   	rex.R
  3f:	22                   	.byte 0x22