rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P4534/1:b..l P8070/1:b..l P8061/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=34337, q=518 ncpus=2)
task:syz-executor.3 state:R running task stack:25536 pid:8061 tgid:8060 ppid:6913 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:debug_lockdep_rcu_enabled+0x26/0x40 kernel/rcu/update.c:320
Code: 90 90 90 90 f3 0f 1e fa 8b 05 92 c8 fc 04 85 c0 74 20 8b 05 74 fa fc 04 85 c0 74 16 65 48 8b 05 d0 4e 1c 75 8b 80 dc 0a 00 00 <85> c0 0f 94 c0 0f b6 c0 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00
RSP: 0018:ffffc900034ff908 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff8880242d42c2 RCX: 0000000000000006
RDX: 1ffff1100c46bcb3 RSI: ffffffff8adac877 RDI: ffff88806235e598
RBP: ffffc900034ff988 R08: 0000000000000001 R09: 000000000000003f
R10: 0000000000000006 R11: 0000000000000002 R12: 0000000000000036
R13: ffff88806235e3c0 R14: ffff88806259d270 R15: 0000000000000db9
xa_entry include/linux/xarray.h:1220 [inline]
xas_descend lib/xarray.c:207 [inline]
xas_load+0x18b/0x5b0 lib/xarray.c:245
filemap_get_entry+0x10f/0x470 mm/filemap.c:1840
shmem_get_folio_gfp+0x369/0x13d0 mm/shmem.c:1982
shmem_get_folio mm/shmem.c:2160 [inline]
shmem_write_begin+0x15a/0x360 mm/shmem.c:2743
generic_perform_write+0x272/0x620 mm/filemap.c:4015
shmem_file_write_iter+0x114/0x140 mm/shmem.c:2919
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0x6b6/0x1140 fs/read_write.c:590
ksys_write+0x12f/0x260 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0d47c7bc2f
RSP: 002b:00007f0d48a6ee80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f0d47c7bc2f
RDX: 0000000001000000 RSI: 00007f0d3da00000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000005598
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f0d48a6ef80 R14: 00007f0d48a6ef40 R15: 00007f0d3da00000
task:syz-executor.2 state:R running task stack:25696 pid:8070 tgid:8068 ppid:6231 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6924
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]
do_wp_page+0xd8b/0x3380 mm/memory.c:3678
handle_pte_fault mm/memory.c:5396 [inline]
__handle_mm_fault+0x2311/0x53f0 mm/memory.c:5523
handle_mm_fault+0x476/0xa00 mm/memory.c:5688
do_user_addr_fault+0x2e5/0xe50 arch/x86/mm/fault.c:1389
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1
RSP: 0018:ffffc9000359f958 EFLAGS: 00050206
RAX: 0000000000000001 RBX: 0000000000001000 RCX: 0000000000000e80
RDX: 0000000000000000 RSI: ffff888012e73180 RDI: 0000000020ff6000
RBP: 0000000000001000 R08: 0000000000000000 R09: ffffed10025ce7ff
R10: ffff888012e73fff R11: 0000000000000000 R12: 0000000000ff5b80
R13: ffffc9000359fd50 R14: ffff888012e73000 R15: 0000000020ff5e80
copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:131 [inline]
copy_to_user_iter lib/iov_iter.c:25 [inline]
iterate_iovec include/linux/iov_iter.h:51 [inline]
iterate_and_advance2 include/linux/iov_iter.h:247 [inline]
iterate_and_advance include/linux/iov_iter.h:271 [inline]
_copy_to_iter+0x4d2/0x1140 lib/iov_iter.c:185
copy_page_to_iter lib/iov_iter.c:362 [inline]
copy_page_to_iter+0xf1/0x180 lib/iov_iter.c:349
process_vm_rw_pages mm/process_vm_access.c:45 [inline]
process_vm_rw_single_vec mm/process_vm_access.c:118 [inline]
process_vm_rw_core.constprop.0+0x5c9/0xa10 mm/process_vm_access.c:216
process_vm_rw+0x301/0x360 mm/process_vm_access.c:284
__do_sys_process_vm_readv mm/process_vm_access.c:296 [inline]
__se_sys_process_vm_readv mm/process_vm_access.c:292 [inline]
__x64_sys_process_vm_readv+0xe2/0x1c0 mm/process_vm_access.c:292
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2f07c7cee9
RSP: 002b:00007f2f08a930c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000136
RAX: ffffffffffffffda RBX: 00007f2f07dabf80 RCX: 00007f2f07c7cee9
RDX: 0000000000000002 RSI: 0000000020008400 RDI: 00000000000000dc
RBP: 00007f2f07cc949e R08: 0000000000000286 R09: 0000000000000000
R10: 0000000020008640 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f2f07dabf80 R15: 00007ffd82210a98
task:udevd state:R running task stack:25536 pid:4534 tgid:4534 ppid:1 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6924
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194
sock_def_readable+0x160/0x610 net/core/sock.c:3353
__netlink_sendskb net/netlink/af_netlink.c:1282 [inline]
netlink_sendskb net/netlink/af_netlink.c:1288 [inline]
netlink_unicast+0x6fb/0x820 net/netlink/af_netlink.c:1376
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0xab5/0xc90 net/socket.c:2585
___sys_sendmsg+0x135/0x1e0 net/socket.c:2639
__sys_sendmsg+0x117/0x1f0 net/socket.c:2668
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe7ca324a4b
RSP: 002b:00007ffc24c3dc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000055abe9eb4240 RCX: 00007fe7ca324a4b
RDX: 0000000000000000 RSI: 00007ffc24c3dc78 RDI: 0000000000000004
RBP: 000055abe9ee9410 R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000000b4 R14: 0000000000000000 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 10269 jiffies! g34337 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:27200 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2000
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 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 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112
sched: RT throttling activated