rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-0): P5718/1:b..l
rcu: (detected by 0, t=10987 jiffies, g=30669, q=958 ncpus=1)
task:syz-executor state:R running task stack:21608 pid:5718 tgid:5718 ppid:5714 task_flags:0x400140 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6947
preempt_schedule+0xe4/0xf0 kernel/sched/core.c:6971
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
vprintk_emit+0x880/0xa40 kernel/printk/printk.c:2451
dev_vprintk_emit+0x358/0x420 drivers/base/core.c:4891
dev_printk_emit+0xdf/0x130 drivers/base/core.c:4902
__netdev_printk+0x3e0/0x4d0 net/core/dev.c:12392
netdev_info+0x12d/0x180 net/core/dev.c:12447
nsim_udp_tunnel_set_port+0x2b5/0x460 drivers/net/netdevsim/udp_tunnels.c:34
udp_tunnel_nic_device_sync_one net/ipv4/udp_tunnel_nic.c:-1 [inline]
udp_tunnel_nic_device_sync_by_port net/ipv4/udp_tunnel_nic.c:246 [inline]
__udp_tunnel_nic_device_sync+0xa83/0x13b0 net/ipv4/udp_tunnel_nic.c:289
udp_tunnel_nic_device_sync net/ipv4/udp_tunnel_nic.c:312 [inline]
__udp_tunnel_nic_add_port+0xc45/0xf10 net/ipv4/udp_tunnel_nic.c:531
udp_tunnel_nic_add_port include/net/udp_tunnel.h:350 [inline]
udp_tunnel_notify_add_rx_port+0x30c/0x4d0 net/ipv4/udp_tunnel_core.c:128
geneve_socket_create drivers/net/geneve.c:612 [inline]
geneve_sock_add+0x698/0xc40 drivers/net/geneve.c:687
geneve_open+0xe3/0x160 drivers/net/geneve.c:729
__dev_open+0x484/0x900 net/core/dev.c:1636
__dev_change_flags+0x1e4/0x700 net/core/dev.c:9370
netif_change_flags+0x8b/0x1a0 net/core/dev.c:9433
do_setlink+0x1077/0x4370 net/core/rtnetlink.c:3152
rtnl_changelink net/core/rtnetlink.c:3769 [inline]
__rtnl_newlink net/core/rtnetlink.c:3928 [inline]
rtnl_newlink+0x17e2/0x1fe0 net/core/rtnetlink.c:4065
rtnetlink_rcv_msg+0x80f/0xd70 net/core/rtnetlink.c:6955
netlink_rcv_skb+0x208/0x480 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x7f8/0x9a0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8c3/0xcd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:727
__sys_sendto+0x365/0x4c0 net/socket.c:2180
__do_sys_sendto net/socket.c:2187 [inline]
__se_sys_sendto net/socket.c:2183 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2183
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feba8b8effc
RSP: 002b:00007ffd58d5c210 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007feba98d4620 RCX: 00007feba8b8effc
RDX: 000000000000002c RSI: 00007feba98d4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd58d5c264 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007feba98d4670 R15: 0000000000000000
rcu: rcu_preempt kthread timer wakeup didn't happen for 6023 jiffies! g30669 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=12260
rcu: rcu_preempt kthread starved for 6024 jiffies! g30669 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:26984 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_timeout+0x15b/0x2b0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2e1/0x1340 kernel/rcu/tree.c:2046
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2248
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 5942 Comm: syz-executor Not tainted 6.14.0-syzkaller-ga2cc6ff5ec8f #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__pte_needs_invert arch/x86/include/asm/pgtable-invert.h:18 [inline]
RIP: 0010:protnone_mask arch/x86/include/asm/pgtable-invert.h:24 [inline]
RIP: 0010:pmd_pfn arch/x86/include/asm/pgtable.h:273 [inline]
RIP: 0010:pte_lockptr include/linux/mm.h:3037 [inline]
RIP: 0010:__pte_offset_map_lock+0x138/0x310 mm/pgtable-generic.c:401
Code: 89 44 24 20 43 80 3c 2f 00 74 0d 48 8d bc 24 80 00 00 00 e8 4a 5b 14 00 4c 8b b4 24 80 00 00 00 31 ff 4c 89 f6 e8 98 3b aa ff <4d> 85 f6 41 0f 95 c5 4c 89 f6 48 83 e6 01 0f 94 c3 31 ff e8 80 3b
RSP: 0000:ffffc9000d4ef660 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffffff93687020 RCX: ffff88801f932440
RDX: 1ffff92001a9deb8 RSI: 0000000050a09067 RDI: 0000000000000000
RBP: ffffc9000d4ef750 R08: ffffffff821920c8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff92001a9ded4
R13: dffffc0000000000 R14: 0000000050a09067 R15: 1ffff92001a9dedc
FS: 0000000000000000(0000) GS:ffff88808c599000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f155997d618 CR3: 000000005294e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pte_offset_map_lock include/linux/mm.h:3132 [inline]
finish_fault+0x9e8/0x12a0 mm/memory.c:5365
do_cow_fault mm/memory.c:5560 [inline]
do_fault mm/memory.c:5654 [inline]
do_pte_missing mm/memory.c:4160 [inline]
handle_pte_fault+0x3776/0x61c0 mm/memory.c:5997
__handle_mm_fault mm/memory.c:6140 [inline]
handle_mm_fault+0x1129/0x1bf0 mm/memory.c:6309
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x45b/0x920 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f15597a5ede
Code: 77 09 48 8b 57 08 48 89 54 c4 88 48 8b 47 10 48 83 c7 10 48 85 c0 75 e4 48 8b 4c 24 b8 0f b7 54 24 18 48 8b 84 24 20 01 00 00 <48> 89 0d 33 77 1d 00 48 8b 4c 24 40 66 89 15 1b 77 1d 00 48 8b 54
RSP: 002b:00007ffcf0b4c2f8 EFLAGS: 00010246
RAX: 0000000000000e30 RBX: 0000000000000000 RCX: 0000000000001000
RDX: 000000000000037f RSI: 0000000000000002 RDI: 00007ffcf0b4c6c8
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002
R13: 00007ffcf0b4c538 R14: 0000000000000000 R15: 0000000000000000