Extracting prog: 4m25.379204306s Minimizing prog: 21m45.294637155s Simplifying prog options: 5m8.102459543s Extracting C: 2m22.457077046s Simplifying C: 0s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 6m0s testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300001050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000100008000300640000000c000700e803000000000099", 0x68, 0x20000040, 0x0, 0x0) program crashed: INFO: rcu detected stall in symlinkat single: successfully extracted reproducer found reproducer with 2 syscalls minimizing guilty program testing program (duration=4m57.010425156s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink detailed listing: executing program 0: socket$netlink(0x10, 0x3, 0x0) program did not crash testing program (duration=4m57.010425156s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): sendto detailed listing: executing program 0: sendto(0xffffffffffffffff, &(0x7f0000000000)="68000000300001050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000100008000300640000000c000700e803000000000099", 0x68, 0x20000040, 0x0, 0x0) program did not crash testing program (duration=4m57.010425156s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, 0x0, 0x0, 0x20000040, 0x0, 0x0) program did not crash testing program (duration=4m57.010425156s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000), 0x0, 0x20000040, 0x0, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=4m57.010425156s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto program crashed: INFO: rcu detected stall in worker_thread a never seen crash title: INFO: rcu detected stall in worker_thread, ignore simplifying guilty program options testing program (duration=4m57.010425156s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300001050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000100008000300640000000c000700e803000000000099", 0x68, 0x20000040, 0x0, 0x0) program crashed: INFO: rcu detected stall in worker_thread a never seen crash title: INFO: rcu detected stall in worker_thread, ignore testing program (duration=4m57.010425156s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300001050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000100008000300640000000c000700e803000000000099", 0x68, 0x20000040, 0x0, 0x0) program crashed: INFO: rcu detected stall in sys_openat a never seen crash title: INFO: rcu detected stall in sys_openat, ignore testing program (duration=4m57.010425156s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300001050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000100008000300640000000c000700e803000000000099", 0x68, 0x20000040, 0x0, 0x0) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true testing program (duration=4m57.010425156s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300001050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000100008000300640000000c000700e803000000000099", 0x68, 0x20000040, 0x0, 0x0) program crashed: INFO: rcu detected stall in netlink_sendmsg validation run: crashed=true testing program (duration=4m57.010425156s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300001050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000100008000300640000000c000700e803000000000099", 0x68, 0x20000040, 0x0, 0x0) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true reproducing took 41m35.128849327s repro crashed as (corrupted=true): rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=183c/1/0x4000000000000000 softirq=18144/18144 fqs=5132 rcu: hardirqs softirqs csw/system rcu: number: 5261 0 0 rcu: cputime: 187 52292 22 ==> 52480(ms) rcu: (t=10500 jiffies g=18293 q=1222 ncpus=2) CPU: 1 UID: 0 PID: 5760 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:221 Code: f7 e8 1d 34 a2 f5 f7 c3 00 02 00 00 74 05 e8 d0 c2 ce f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 24 2d 93 f5 65 48 8b 05 2c 10 dd 07 48 85 c0 74 18 5b 41 5e c3 RSP: 0018:ffffc90000a38e40 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000287 RCX: 0000000000000102 RDX: 0000000000000002 RSI: ffffffff8e74f1c1 RDI: 0000000000000001 RBP: ffff888071a68138 R08: ffffffff90bc9ebf R09: 1ffffffff21793d7 R10: dffffc0000000000 R11: fffffbfff21793d8 R12: ffff8880b85286c0 R13: ffffffff89f7e5d0 R14: ffff8880b85286c0 R15: 1ffff110170a5162 FS: 000055558e1ab500(0000) GS:ffff888124723000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f545ee3efe8 CR3: 000000007cc60000 CR4: 00000000003526f0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:2071 [inline] __hrtimer_run_queues+0x2bf/0xa10 kernel/time/hrtimer.c:2132 hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2149 handle_softirqs+0x223/0x840 kernel/softirq.c:645 do_softirq+0x77/0xd0 kernel/softirq.c:546 __local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473 spin_unlock_bh include/linux/spinlock.h:407 [inline] __ip6_ins_rt net/ipv6/route.c:1358 [inline] ip6_route_add+0xe8/0x1b0 net/ipv6/route.c:3931 addrconf_prefix_route+0x3a2/0x480 net/ipv6/addrconf.c:2507 inet6_addr_add+0x504/0xb50 net/ipv6/addrconf.c:3080 inet6_rtm_newaddr+0x9fc/0xe00 net/ipv6/addrconf.c:5100 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7159 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2572 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7bd/0x940 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x7c3/0xae0 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800 __sock_sendmsg net/socket.c:815 [inline] __sys_sendto+0x408/0x5a0 net/socket.c:2280 __do_sys_sendto net/socket.c:2287 [inline] __se_sys_sendto net/socket.c:2283 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2283 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff048b5e98e Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08 RSP: 002b:00007ffd09e70c38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000055558e1ab500 RCX: 00007ff048b5e98e RDX: 0000000000000040 RSI: 00007ff049954670 RDI: 0000000000000003 RBP: 0000000000000001 R08: 00007ffd09e70cb4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 0000000000000000 R14: 00007ff049954670 R15: 0000000000000000 sched: DL replenish lagged too much report is corrupted, running repro again testing program (duration=4m57.010425156s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$netlink-sendto detailed listing: executing program 0: r0 = socket$netlink(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000000)="68000000300001050100000000000000000000005400018050000180090001006761746500000000400002801800020000000000000000000000000000000000000000001800058014000180080001000000100008000300640000000c000700e803000000000099", 0x68, 0x20000040, 0x0, 0x0) program crashed: INFO: rcu detected stall in sys_getsockopt final repro crashed as (corrupted=false): rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=e18c/1/0x4000000000000000 softirq=17698/17701 fqs=5250 rcu: hardirqs softirqs csw/system rcu: number: 5261 0 0 rcu: cputime: 183 52306 24 ==> 52500(ms) rcu: (t=10502 jiffies g=18453 q=1244 ncpus=2) CPU: 1 UID: 0 PID: 5754 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:221 Code: f7 e8 1d 34 a2 f5 f7 c3 00 02 00 00 74 05 e8 d0 c2 ce f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 24 2d 93 f5 65 48 8b 05 2c 10 dd 07 48 85 c0 74 18 5b 41 5e c3 RSP: 0018:ffffc90000a38e18 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000287 RCX: 0000000000000101 RDX: 0000000000000002 RSI: ffffffff8e74f1c1 RDI: 0000000000000001 RBP: ffff8880260a7138 R08: ffffffff90bc9ebf R09: 1ffffffff21793d7 R10: dffffc0000000000 R11: fffffbfff21793d8 R12: ffff8880b85286c0 R13: ffffffff89f7e5d0 R14: ffff8880b85286c0 R15: 1ffff110170a5162 FS: 00005555923d5500(0000) GS:ffff888124723000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9d72df0078 CR3: 000000007e6ca000 CR4: 00000000003526f0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:2071 [inline] __hrtimer_run_queues+0x2bf/0xa10 kernel/time/hrtimer.c:2132 hrtimer_run_softirq+0x1e3/0x2e0 kernel/time/hrtimer.c:2149 handle_softirqs+0x223/0x840 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947 Code: ff ff ff e8 40 a9 5b 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 d2 83 3b 12 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 37 8c 1b RSP: 0018:ffffc900037d6d40 EFLAGS: 00000292 RAX: fca49262aeee3c00 RBX: 0000000000000000 RCX: 0000000000000046 RDX: 00000000c2f114ec RSI: ffffffff8e9dafe5 RDI: ffffffff8c8f3280 RBP: ffff888030ca0000 R08: ffffffff8178599f R09: 0000000000000000 R10: ffffc900037d6e78 R11: ffffffff81b3d2e0 R12: ffffffff8f15c520 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:309 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] class_rcu_constructor include/linux/rcupdate.h:1216 [inline] unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 save_stack+0x122/0x230 mm/page_owner.c:183 __set_page_owner+0x8d/0x4c0 mm/page_owner.c:359 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1854 prep_new_page mm/page_alloc.c:1862 [inline] get_page_from_freelist+0x220f/0x2280 mm/page_alloc.c:3933 __alloc_frozen_pages_noprof+0x1fc/0x400 mm/page_alloc.c:5441 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5476 alloc_pages_bulk_noprof+0x668/0x890 mm/page_alloc.c:5300 vm_area_alloc_pages mm/vmalloc.c:3753 [inline] __vmalloc_area_node mm/vmalloc.c:3928 [inline] __vmalloc_node_range_noprof+0xad1/0x16f0 mm/vmalloc.c:4132 __vmalloc_node_noprof mm/vmalloc.c:4193 [inline] vzalloc_noprof+0xb2/0xe0 mm/vmalloc.c:4271 alloc_counters+0x63/0x5c0 net/ipv4/netfilter/ip_tables.c:799 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1020 [inline] do_ipt_get_ctl+0xb3c/0x1300 net/ipv4/netfilter/ip_tables.c:1669 nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116 ip_getsockopt+0x19e/0x230 net/ipv4/ip_sockglue.c:1785 do_sock_getsockopt+0x4aa/0x640 net/socket.c:2502 __sys_getsockopt net/socket.c:2533 [inline] __do_sys_getsockopt net/socket.c:2540 [inline] __se_sys_getsockopt net/socket.c:2537 [inline] __x64_sys_getsockopt+0x1a4/0x240 net/socket.c:2537 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9d72b9f92a Code: 48 83 ec 10 89 d2 48 63 ff 45 31 c9 6a 2a 45 31 c0 31 c9 e8 d8 99 fb ff 48 83 c4 18 c3 0f 1f 00 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 e8 ff ff ff f7 RSP: 002b:00007fffeffef9e8 EFLAGS: 00000212 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fffeffefa70 RCX: 00007f9d72b9f92a RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007fffeffefa0c R09: 0000000000000000 R10: 00007fffeffefa70 R11: 0000000000000212 R12: 00007f9d72df0d40 R13: 00007fffeffefa0c R14: 0000000000000000 R15: 00007f9d72df2180 sched: DL replenish lagged too much