rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7751/2:b..l P10625
(detected by 1, t=10503 jiffies, g=54689, q=543 ncpus=2)
task:syz.1.2615 state:R running task stack:22008 pid:10625 ppid:10422 flags:0x00004008
Call Trace:
sched_show_task+0x4d5/0x670 kernel/sched/core.c:8942
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:261 [inline]
print_other_cpu_stall+0x1299/0x1640 kernel/rcu/tree_stall.h:606
check_cpu_stall kernel/rcu/tree_stall.h:778 [inline]
rcu_pending kernel/rcu/tree.c:3890 [inline]
rcu_sched_clock_irq+0xaf6/0x1200 kernel/rcu/tree.c:2393
update_process_times+0x147/0x1b0 kernel/time/timer.c:1869
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1501
__run_hrtimer kernel/time/hrtimer.c:1686 [inline]
__hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1750
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:dst_alloc+0x3f/0x190 net/core/dst.c:83
Code: ce 41 89 d5 48 89 74 24 10 49 89 ff 48 bb 00 00 00 00 00 fc ff df e8 60 77 ec f8 49 8d 6f 08 48 89 e8 48 c1 e8 03 80 3c 18 00 <74> 08 48 89 ef e8 67 f3 43 f9 4c 8b 65 00 8b 6c 24 0c 83 e5 08 31
RSP: 0018:ffffc900001e07e8 EFLAGS: 00000246
RAX: 1ffff1100ec38121 RBX: dffffc0000000000 RCX: ffff888023a1d940
RDX: 0000000000000101 RSI: ffff88807e91c000 RDI: ffff8880761c0900
RBP: ffff8880761c0908 R08: 0000000000000000 R09: fffffbfff1d33896
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88805a277c38
R13: 0000000000000001 R14: 00000000ffffffff R15: ffff8880761c0900
ip6_dst_alloc net/ipv6/route.c:345 [inline]
icmp6_dst_alloc+0x7b/0x470 net/ipv6/route.c:3269
ndisc_send_skb+0x344/0x14e0 net/ipv6/ndisc.c:489
addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3963
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1549 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
__do_softirq kernel/softirq.c:605 [inline]
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:preempt_schedule_irq+0xf2/0x1c0 kernel/sched/core.c:6870
Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 97 00 00 00 bf 01 00 00 00 e8 69 a4 b0 f6 e8 d4 a2 e3 f6 fb bf 01 00 00 00 79 b4 ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 69 5c 34 f7 48
RSP: 0018:ffffc900171066c0 EFLAGS: 00000282
RAX: 8a00df48b0d07400 RBX: 1ffff92002e20ce0 RCX: ffffffff816adfda
RDX: dffffc0000000000 RSI: ffffffff8b0c0260 RDI: 0000000000000001
RBP: ffffc90017106780 R08: dffffc0000000000 R09: fffffbfff20e725c
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92002e20cd8
R13: 1ffff92002e20cdc R14: ffffc900171066e0 R15: dffffc0000000000
irqentry_exit+0x53/0x80 kernel/entry/common.c:439
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666
Code: 2b 00 74 08 4c 89 f7 e8 9f a8 77 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90017106840 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92002e20d14 RCX: 1ffff92002e20cb4
RDX: dffffc0000000000 RSI: ffffffff8b0c13e0 RDI: ffffffff8b5d5de0
RBP: ffffc90017106988 R08: dffffc0000000000 R09: fffffbfff20e7245
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92002e20d10
R13: dffffc0000000000 R14: ffffc900171068a0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
ipv6_addr_label+0x49/0x1d0 net/ipv6/addrlabel.c:148
ipv6_get_saddr_eval+0x5b7/0xe90 net/ipv6/addrconf.c:1623
__ipv6_dev_get_saddr+0x1d3/0x4a0 net/ipv6/addrconf.c:1712
ipv6_dev_get_saddr+0x417/0xbc0 net/ipv6/addrconf.c:1848
ip6_route_get_saddr include/net/ip6_route.h:145 [inline]
ip6_dst_lookup_tail+0xcd4/0x11f0 net/ipv6/ip6_output.c:1121
ip6_dst_lookup_flow+0xb5/0x170 net/ipv6/ip6_output.c:1246
sctp_v6_get_dst+0x950/0x1e40 net/sctp/ipv6.c:327
sctp_transport_route+0x10c/0x2b0 net/sctp/transport.c:455
sctp_packet_config+0x432/0xd90 net/sctp/output.c:103
sctp_packet_singleton+0x149/0x320 net/sctp/outqueue.c:777
sctp_outq_flush_ctrl net/sctp/outqueue.c:914 [inline]
sctp_outq_flush+0x693/0x3d70 net/sctp/outqueue.c:1212
sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]
sctp_do_sm+0x55e7/0x5c80 net/sctp/sm_sideeffect.c:1170
sctp_primitive_ASSOCIATE+0x91/0xc0 net/sctp/primitive.c:73
sctp_sendmsg_to_asoc+0x1025/0x1910 net/sctp/socket.c:1839
sctp_sendmsg+0x1f49/0x3370 net/sctp/socket.c:2029
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2514
___sys_sendmsg net/socket.c:2568 [inline]
__sys_sendmsg+0x2a9/0x390 net/socket.c:2597
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fed7bd779f9
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:00007fed7ca9e048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fed7bf05f80 RCX: 00007fed7bd779f9
RDX: 00000000040080c0 RSI: 00000000200003c0 RDI: 0000000000000008
RBP: 00007fed7bde58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fed7bf05f80 R15: 00007ffee661ac98
task:kworker/1:14 state:R running task stack:24040 pid:7751 ppid:2 flags:0x00004000
Workqueue: mld mld_ifc_work
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6727
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6751
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__local_bh_enable_ip+0x175/0x1f0 kernel/softirq.c:403
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:861 [inline]
__dev_queue_xmit+0x1790/0x3cf0 net/core/dev.c:4320
dev_queue_xmit include/linux/netdevice.h:3021 [inline]
neigh_hh_output include/net/neighbour.h:528 [inline]
neigh_output include/net/neighbour.h:542 [inline]
ip6_finish_output2+0xea9/0x1530 net/ipv6/ip6_output.c:134
__ip6_finish_output net/ipv6/ip6_output.c:201 [inline]
ip6_finish_output+0x6a0/0xa80 net/ipv6/ip6_output.c:212
dst_output include/net/dst.h:444 [inline]
NF_HOOK+0x167/0x530 include/linux/netfilter.h:302
mld_sendpack+0x85e/0xde0 net/ipv6/mcast.c:1820
mld_send_cr net/ipv6/mcast.c:2121 [inline]
mld_ifc_work+0x7d7/0xc90 net/ipv6/mcast.c:2653
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: rcu_preempt kthread starved for 10510 jiffies! g54689 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:I
stack:26472 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4147 Comm: kworker/u4:6 Not tainted 6.1.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline]
RIP: 0010:smp_call_function_many_cond+0x1fb0/0x3460 kernel/smp.c:998
Code: 2f 44 89 ee 83 e6 01 31 ff e8 4c 40 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 0a e8 d7 3c 0b 00 e9 1b ff ff ff f3 90 <42> 0f b6 04 2b 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 fe fe ff ff
RSP: 0018:ffffc900172ae120 EFLAGS: 00000293
RAX: ffffffff817f63eb RBX: 1ffff110173281b1 RCX: ffff88801b6e9dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900172ae500 R08: ffffffff817f63b4 R09: ffffed1017307753
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b9940d88
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feda94960a8 CR3: 000000004e0c0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1166
__flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:924 [inline]
flush_tlb_mm_range+0x353/0x590 arch/x86/mm/tlb.c:1010
flush_tlb_page arch/x86/include/asm/tlbflush.h:240 [inline]
ptep_clear_flush+0x116/0x160 mm/pgtable-generic.c:98
page_vma_mkclean_one+0x569/0x930 mm/rmap.c:970
page_mkclean_one+0x2f8/0x4c0 mm/rmap.c:1018
rmap_walk_file+0x369/0x740 mm/rmap.c:2511
rmap_walk mm/rmap.c:2529 [inline]
folio_mkclean+0x250/0x430 mm/rmap.c:1050
folio_clear_dirty_for_io+0x229/0xcf0 mm/page-writeback.c:2886
mpage_submit_page+0x90/0x230 fs/ext4/inode.c:2110
mpage_process_page_bufs+0x6c8/0x8b0 fs/ext4/inode.c:2244
mpage_prepare_extent_to_map+0xb82/0x1730 fs/ext4/inode.c:2669
ext4_writepages+0xcc8/0x3de0 fs/ext4/inode.c:2797
do_writepages+0x3a2/0x670 mm/page-writeback.c:2491
__writeback_single_inode+0x15d/0x11e0 fs/fs-writeback.c:1612
writeback_sb_inodes+0xc2b/0x1b20 fs/fs-writeback.c:1903
__writeback_inodes_wb+0x114/0x400 fs/fs-writeback.c:1974
wb_writeback+0x4b1/0xe10 fs/fs-writeback.c:2079
wb_check_old_data_flush fs/fs-writeback.c:2179 [inline]
wb_do_writeback fs/fs-writeback.c:2232 [inline]
wb_workfn+0xbec/0x1020 fs/fs-writeback.c:2260
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295