rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10590/1:b..l P9848/1:b..l P5075/2:b..l
rcu: (detected by 1, t=10502 jiffies, g=55529, q=804 ncpus=2)
task:syz-fuzzer state:R running task stack:21680 pid:5075 tgid:5072 ppid:5070 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6745
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__local_bh_enable_ip+0x179/0x200 kernel/softirq.c:389
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:851 [inline]
__dev_queue_xmit+0x16c9/0x3d30 net/core/dev.c:4420
dev_queue_xmit include/linux/netdevice.h:3095 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip_finish_output2+0xd41/0x1380 net/ipv4/ip_output.c:235
ip_local_out net/ipv4/ip_output.c:129 [inline]
__ip_queue_xmit+0x118c/0x1b70 net/ipv4/ip_output.c:535
__tcp_transmit_skb+0x2557/0x3b80 net/ipv4/tcp_output.c:1466
tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
tcp_write_xmit+0x18b3/0x69d0 net/ipv4/tcp_output.c:2829
__tcp_push_pending_frames+0x9b/0x360 net/ipv4/tcp_output.c:3014
tcp_sendmsg_locked+0x4313/0x4d70 net/ipv4/tcp.c:1316
tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1348
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x1a6/0x270 net/socket.c:745
sock_write_iter+0x2dd/0x400 net/socket.c:1160
call_write_iter include/linux/fs.h:2120 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa2d/0xc50 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x40720e
RSP: 002b:000000c000726ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000040720e
RDX: 0000000000000004 RSI: 000000c0000c27a0 RDI: 0000000000000003
RBP: 000000c000727038 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 000000c000727178
R13: 0000000000000001 R14: 000000c0000061a0 R15: 000000000000000f
task:syz-executor.3 state:R running task stack:20280 pid:9848 tgid:9848 ppid:9831 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6745
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6924
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6948
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
copy_pte_range mm/memory.c:1179 [inline]
copy_pmd_range+0x7aa1/0x84c0 mm/memory.c:1240
copy_pud_range mm/memory.c:1277 [inline]
copy_p4d_range mm/memory.c:1301 [inline]
copy_page_range+0x99f/0xe90 mm/memory.c:1399
dup_mmap kernel/fork.c:751 [inline]
dup_mm kernel/fork.c:1688 [inline]
copy_mm+0x128d/0x2020 kernel/fork.c:1737
copy_process+0x187a/0x3dc0 kernel/fork.c:2390
kernel_clone+0x223/0x870 kernel/fork.c:2797
__do_sys_clone kernel/fork.c:2940 [inline]
__se_sys_clone kernel/fork.c:2924 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2924
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe951679f13
RSP: 002b:00007fffe8a9d538 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe951679f13
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055556321a750 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
task:syz-executor.1 state:R running task stack:24664 pid:10590 tgid:10590 ppid:9574 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6745
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:mas_data_end lib/maple_tree.c:1454 [inline]
RIP: 0010:mt_validate_nulls lib/maple_tree.c:7552 [inline]
RIP: 0010:mt_validate+0x4461/0x4aa0 lib/maple_tree.c:7599
Code: 8c 4c 89 e0 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff df 0f b6 04 10 84 c0 0f 85 81 03 00 00 45 0f b6 3c 24 41 8d 47 ff 0f b6 c8 <48> 8b 44 24 58 48 89 4c 24 70 48 8d 1c c8 48 89 d8 48 c1 e8 03 80
RSP: 0018:ffffc9000524f6a0 EFLAGS: 00000293
RAX: 000000000000000e RBX: 0000000000000001 RCX: 000000000000000e
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000004
RBP: ffffc9000524f890 R08: ffffffff8b76441d R09: ffffffff8b764375
R10: 0000000000000003 R11: ffff88805316da00 R12: ffffffff8ceb4481
R13: ffff88802c0e6000 R14: 0000000000000001 R15: 000000000000000f
validate_mm+0xe7/0x530 mm/mmap.c:288
__split_vma+0xa69/0xc30 mm/mmap.c:2430
split_vma mm/mmap.c:2456 [inline]
vma_modify+0x194/0x350 mm/mmap.c:2490
vma_modify_flags include/linux/mm.h:3347 [inline]
mprotect_fixup+0x3ea/0xa90 mm/mprotect.c:636
do_mprotect_pkey+0x903/0xdd0 mm/mprotect.c:810
__do_sys_mprotect mm/mprotect.c:831 [inline]
__se_sys_mprotect mm/mprotect.c:828 [inline]
__x64_sys_mprotect+0x80/0x90 mm/mprotect.c:828
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f949887cfa7
RSP: 002b:00007ffeaa4117e8 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f949962a6c0 RCX: 00007f949887cfa7
RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f949960b000
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000021000 R11: 0000000000000206 R12: 00007ffeaa411a40
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10607 jiffies! g55529 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:R running task stack:26320 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
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: 17 Comm: rcu_preempt Not tainted 6.9.0-syzkaller-09429-g61307b7be41a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__rq_lockp kernel/sched/sched.h:1279 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1397 [inline]
RIP: 0010:update_rq_clock+0x4e/0x8a0 kernel/sched/core.c:755
Code: 00 00 00 fc ff df 42 0f b6 04 30 84 c0 0f 85 2e 06 00 00 83 3d 9e 21 46 0e 00 74 59 49 8d 9d 78 0d 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 4d 06 00 00 83 3b 00 4c 89 ef 74 20 49
RSP: 0018:ffffc90000007a78 EFLAGS: 00000806
RAX: 1ffff11017287e9f RBX: ffff8880b943f4f8 RCX: dffffc0000000000
RDX: 0000000080010005 RSI: ffffffff8bcaca00 RDI: ffff8880b943e780
RBP: ffffc90000007c08 R08: ffffffff81355f81 R09: fffff52000000f44
R10: dffffc0000000000 R11: fffff52000000f44 R12: 1ffff11017287e9f
R13: ffff8880b943e780 R14: dffffc0000000000 R15: 0000000000003e35
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f949964af00 CR3: 0000000058b00000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ttwu_queue kernel/sched/core.c:4056 [inline]
try_to_wake_up+0x872/0x1470 kernel/sched/core.c:4378
signal_wake_up_state+0xb4/0x120 kernel/signal.c:773
signal_wake_up include/linux/sched/signal.h:448 [inline]
complete_signal+0x94a/0xcf0 kernel/signal.c:1065
__send_signal_locked+0xb1b/0xdc0 kernel/signal.c:1185
do_send_sig_info kernel/signal.c:1301 [inline]
group_send_sig_info+0x292/0x310 kernel/signal.c:1453
do_bpf_send_signal+0x85/0x190 kernel/trace/bpf_trace.c:838
irq_work_single+0xe2/0x240 kernel/irq_work.c:221
irq_work_run_list kernel/irq_work.c:252 [inline]
irq_work_run+0x18b/0x350 kernel/irq_work.c:261
__sysvec_irq_work+0xb8/0x430 arch/x86/kernel/irq_work.c:22
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0x9e/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5282
Code: c9 50 e8 49 d1 0b 00 48 83 c4 08 4c 89 f7 e8 ed 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 c0 91 24 0a e8 ab fa 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc900001678c8 EFLAGS: 00000282
RAX: 49fda96b8646e500 RBX: ffff8880176c0000 RCX: ffffffff94760603
RDX: dffffc0000000000 RSI: ffffffff8bcab880 RDI: ffffffff8c1ee360
RBP: ffffc90000167910 R08: ffffffff8faba06f R09: 1ffffffff1f5740d
R10: dffffc0000000000 R11: fffffbfff1f5740e R12: 1ffff11017287e9f
R13: dffffc0000000000 R14: ffff8880b943e780 R15: ffff8880b943f4f8
context_switch kernel/sched/core.c:5411 [inline]
__schedule+0x179e/0x4a00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:2000
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
sched: RT throttling activated