sched: DL replenish lagged too much
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11833 at kernel/rcu/tree_stall.h:1015 rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1015
Modules linked in:
CPU: 1 UID: 0 PID: 11833 Comm: syz.0.1885 Not tainted 6.16.0-rc6-syzkaller-g5b4c54ac49af #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1015
Code: ff ff 48 c7 c7 00 84 af 99 be 04 00 00 00 e8 03 8f 7b 00 4c 89 f7 b8 01 00 00 00 87 05 15 cf 07 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 40 44 14 8e 74 47 48 c7 c0 30 1a a2 8f 48 c1 e8
RSP: 0018:ffffc90000a08bb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000a02 RCX: ffffffff81a7b4dd
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e144440
RBP: ffffc90000a08e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff335f080 R12: 0000000000002904
R13: 1ffff110170e75fa R14: ffffffff8e144440 R15: dffffc0000000000
FS: 00007ff508c876c0(0000) GS:ffff888125d1f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000062b000 CR3: 000000002a43e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
rcu_core+0x5f7/0x1710 kernel/rcu/tree.c:2827
handle_softirqs+0x283/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:rcu_read_unlock_special+0x87/0x4c0 kernel/rcu/tree_plugin.h:694
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 92 37 f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc9000b6def80 EFLAGS: 00000206
RAX: deb9cbff9f3e3400 RBX: 1ffff920016dbdf8 RCX: deb9cbff9f3e3400
RDX: 0000000000000006 RSI: ffffffff8d9986de RDI: ffffffff8be29f00
RBP: ffffc9000b6df080 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
__rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438
rcu_read_unlock include/linux/rcupdate.h:873 [inline]
trace_call_bpf+0x5ae/0x850 kernel/trace/bpf_trace.c:148
perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10891
do_perf_trace_lock include/trace/events/lock.h:50 [inline]
perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50
__do_trace_lock_release include/trace/events/lock.h:69 [inline]
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5882
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock_sched include/linux/rcupdate.h:953 [inline]
pfn_valid include/linux/mmzone.h:2168 [inline]
__virt_addr_valid+0x475/0x5c0 arch/x86/mm/physaddr.c:65
kasan_addr_to_slab+0xf/0x90 mm/kasan/common.c:37
kasan_record_aux_stack+0xf/0xd0 mm/kasan/generic.c:533
kvfree_call_rcu+0xbb/0x410 mm/slab_common.c:1962
drop_sysctl_table+0x385/0x510 fs/proc/proc_sysctl.c:1522
drop_sysctl_table+0x39c/0x510 fs/proc/proc_sysctl.c:1525
unregister_sysctl_table+0x41/0x60 fs/proc/proc_sysctl.c:1543
netfilter_log_sysctl_exit net/netfilter/nf_log.c:519 [inline]
nf_log_net_exit+0x60/0xc0 net/netfilter/nf_log.c:560
ops_exit_list net/core/net_namespace.c:200 [inline]
ops_undo_list+0x49a/0x990 net/core/net_namespace.c:253
setup_net+0x3e2/0x4b0 net/core/net_namespace.c:457
copy_net_ns+0x31b/0x4d0 net/core/net_namespace.c:574
create_new_namespaces+0x3f3/0x720 kernel/nsproxy.c:110
copy_namespaces+0x438/0x4b0 kernel/nsproxy.c:175
copy_process+0x1700/0x3b80 kernel/fork.c:2172
kernel_clone+0x21e/0x870 kernel/fork.c:2599
__do_sys_clone kernel/fork.c:2742 [inline]
__se_sys_clone kernel/fork.c:2726 [inline]
__x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2726
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff507d8e9a9
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:00007ff508c86fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ff507fb5fa0 RCX: 00007ff507d8e9a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000e50c1600
RBP: 00007ff507e10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff507fb5fa0 R15: 00007fffa456c248
----------------
Code disassembly (best guess):
0: f1 int1
1: f1 int1
2: f1 int1
3: 00 f2 add %dh,%dl
5: f2 f2 4a 89 04 2b repnz repnz mov %rax,(%rbx,%r13,1)
b: 66 42 c7 44 2b 09 f3 movw $0xf3f3,0x9(%rbx,%r13,1)
12: f3
13: 42 c6 44 2b 0b f3 movb $0xf3,0xb(%rbx,%r13,1)
19: 65 44 8b 35 92 37 f8 mov %gs:0x10f83792(%rip),%r14d # 0x10f837b3
20: 10
21: 41 f7 c6 00 00 f0 00 test $0xf00000,%r14d
28: 74 49 je 0x73
* 2a: 48 c7 44 24 40 0e 36 movq $0x45e0360e,0x40(%rsp) <-- trapping instruction
31: e0 45
33: 4a c7 04 2b 00 00 00 movq $0x0,(%rbx,%r13,1)
3a: 00
3b: 66 data16
3c: 42 rex.X
3d: c7 .byte 0xc7
3e: 44 rex.R
3f: 2b .byte 0x2b