rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5105/1:b..l P5084/1:b..l P4537/1:b..l P5090/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=9121, q=820 ncpus=2)
task:syz-executor state:R running task stack:19344 pid:5090 tgid:5090 ppid:5080 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 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+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f005a76c4d3
RSP: 002b:00007ffeb3e200f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f005a76c4d3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055556fe677d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
task:udevd state:R running task stack:22656 pid:4537 tgid:4537 ppid:1 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 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]
__d_lookup+0x66c/0x7e0 fs/dcache.c:2323
lookup_fast+0x74/0x4a0 fs/namei.c:1650
walk_component fs/namei.c:2000 [inline]
link_path_walk+0x60b/0xea0 fs/namei.c:2331
path_lookupat+0xa9/0x450 fs/namei.c:2492
filename_lookup+0x256/0x610 fs/namei.c:2522
user_path_at_empty+0x42/0x60 fs/namei.c:2929
do_readlinkat+0x118/0x3b0 fs/stat.c:499
__do_sys_readlink fs/stat.c:532 [inline]
__se_sys_readlink fs/stat.c:529 [inline]
__x64_sys_readlink+0x7f/0x90 fs/stat.c:529
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb082b17d47
RSP: 002b:00007ffe64a8a128 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007ffe64a8a138 RCX: 00007fb082b17d47
RDX: 0000000000000400 RSI: 00007ffe64a8a138 RDI: 00007ffe64a8a618
RBP: 0000000000000400 R08: 0000556ccbe904c4 R09: 0000000000000000
R10: 0000000000000812 R11: 0000000000000246 R12: 00007ffe64a8a618
R13: 00007ffe64a8a588 R14: 0000556ccbe79910 R15: 0000000000000000
task:syz-executor state:R running task stack:19512 pid:5084 tgid:5084 ppid:5078 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 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+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5a3776c4d3
RSP: 002b:00007ffdd76521c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5a3776c4d3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000555570e047d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
task:udevd state:R running task stack:23376 pid:5105 tgid:5105 ppid:4537 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 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:fast_dput+0xb/0x420 fs/dcache.c:747
Code: df 5b 41 5e 5d e9 95 3e 78 09 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 41 55 41 54 53 50 <49> 89 fc e8 fd 55 86 ff 4d 8d b4 24 98 00 00 00 4c 89 f7 e8 6d ab
RSP: 0018:ffffc90003e3fd80 EFLAGS: 00000293
RAX: ffffffff820fce6a RBX: ffff888020ba22f0 RCX: ffff8880653e3c00
RDX: 0000000000000000 RSI: ffffffff8c1f15e0 RDI: ffff888020ba22f0
RBP: 0000000000000001 R08: ffffffff820fce58 R09: 1ffffffff25ee2b0
R10: dffffc0000000000 R11: fffffbfff25ee2b1 R12: ffffc90003e3fe60
R13: ffff88802dc42200 R14: ffffffff820fce27 R15: 0000000000000000
dput+0xe8/0x2b0 fs/dcache.c:839
path_put fs/namei.c:561 [inline]
done_path_create fs/namei.c:3959 [inline]
do_symlinkat+0x2c8/0x3a0 fs/namei.c:4523
__do_sys_symlink fs/namei.c:4542 [inline]
__se_sys_symlink fs/namei.c:4540 [inline]
__x64_sys_symlink+0x7e/0x90 fs/namei.c:4540
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb082b17ce7
RSP: 002b:00007ffe64a8a8c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007ffe64a8a8d8 RCX: 00007fb082b17ce7
RDX: 0000000000000000 RSI: 00007ffe64a8a8d8 RDI: 0000556ccbe887a0
RBP: 0000556ccbe97d90 R08: 0000000000000000 R09: 00007ffe64a8a248
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000045
R13: 0000556ccbe8e540 R14: 0000000000000008 R15: 0000556ccbe79910
rcu: rcu_preempt kthread starved for 10535 jiffies! g9121 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:25328 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x1796/0x49d0 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/0x1330 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:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.10.0-rc6-syzkaller-00163-g661e504db04c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:113
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 80 d4 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d b5 37 ab 00 f3 0f 1e fa fb f4 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffffff8e007ca8 EFLAGS: 00000246
RAX: ffffffff8e094680 RBX: ffff88801beb5064 RCX: 0000000000046829
RDX: 0000000000000001 RSI: ffff88801beb5000 RDI: ffff88801beb5064
RBP: 000000000003a538 R08: ffff8880b9437ccb R09: 1ffff11017286f99
R10: dffffc0000000000 R11: ffffffff8b7d68c0 R12: ffff88801ab0a800
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eabb800
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fccdb962fc7 CR3: 000000001aeee000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707
cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x375/0x5d0 kernel/sched/idle.c:332
cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430
rest_init+0x2dc/0x300 init/main.c:747
start_kernel+0x47a/0x500 init/main.c:1103
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488
common_startup_64+0x13e/0x147