rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=d1f4/1/0x4000000000000000 softirq=170360/170365 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P17656/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=113645, q=316 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11096 Comm: syz-executor Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:227 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:239 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228
Code: 8e da 00 00 00 0f b7 5b 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 c0 0c e5 96 e8 02 f2 86 00 <48> 0f a3 1d da 3b 6f 15 73 13 48 69 c3 c8 00 00 00 5b 48 05 e0 10
RSP: 0018:ffffc90000007a90 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000070 RCX: ffffffff8175d0de
RDX: fffffbfff2dca19a RSI: 0000000000000008 RDI: ffffffff96e50cc8
RBP: ffffc90000007bd8 R08: 0000000000000000 R09: fffffbfff2dca199
R10: ffffffff96e50ccf R11: 0000000000000001 R12: ffff88802bd70000
R13: 0000000000000100 R14: 0000000000000008 R15: 1ffff92000000f5a
FS: 00005555854c8500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c24dcb6 CR3: 000000004d99e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_lock+0xb5/0xc60 kernel/locking/lockdep.c:4727
mark_usage kernel/locking/lockdep.c:4670 [inline]
__lock_acquire+0x9f1/0x3c40 kernel/locking/lockdep.c:5180
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170
__run_hrtimer kernel/time/hrtimer.c:1743 [inline]
__hrtimer_run_queues+0x2be/0xae0 kernel/time/hrtimer.c:1803
hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 46 92 4a f6 48 89 df e8 8e 11 4b f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 85 f6 3b f6 65 8b 05 a6 b2 d7 74 85 c0 74 16 5b
RSP: 0018:ffffc9000d5af890 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffffff9a9b64a8 RCX: 1ffffffff20bde31
RDX: 0000000000000000 RSI: ffffffff8b6cd860 RDI: ffffffff8bd1eba0
RBP: 0000000000000202 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff905f33d7 R11: 0000000000000002 R12: 00000000000001f4
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000202
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
avc_reclaim_node security/selinux/avc.c:482 [inline]
avc_alloc_node+0x365/0x5a0 security/selinux/avc.c:501
avc_insert security/selinux/avc.c:612 [inline]
avc_compute_av+0xfd/0x5c0 security/selinux/avc.c:987
avc_perm_nonode+0xaa/0x170 security/selinux/avc.c:1110
avc_has_perm_noaudit+0x2d2/0x3a0 security/selinux/avc.c:1153
selinux_inode_permission+0x361/0x590 security/selinux/hooks.c:3118
security_inode_permission+0xda/0x260 security/security.c:2319
inode_permission fs/namei.c:600 [inline]
inode_permission+0x17a/0x5f0 fs/namei.c:567
may_lookup fs/namei.c:1819 [inline]
link_path_walk.part.0.constprop.0+0x1d7/0xd40 fs/namei.c:2425
link_path_walk fs/namei.c:2408 [inline]
path_lookupat+0x93/0x770 fs/namei.c:2633
filename_lookup+0x221/0x5f0 fs/namei.c:2663
user_path_at+0x3a/0x60 fs/namei.c:3070
ksys_umount fs/namespace.c:2033 [inline]
__do_sys_umount fs/namespace.c:2041 [inline]
__se_sys_umount fs/namespace.c:2039 [inline]
__x64_sys_umount+0x10b/0x1a0 fs/namespace.c:2039
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: 0033:0x7ff64df87057
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffeaf69a058 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff64df87057
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeaf69a110
RBP: 00007ffeaf69a110 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffeaf69b190
R13: 00007ff64e001894 R14: 00007ffeaf69b1d0 R15: 0000000000000203
task:syz-executor state:R running task stack:24208 pid:17656 tgid:17656 ppid:17655 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6935
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
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
avc_reclaim_node security/selinux/avc.c:482 [inline]
avc_alloc_node+0x365/0x5a0 security/selinux/avc.c:501
avc_insert security/selinux/avc.c:612 [inline]
avc_compute_av+0xfd/0x5c0 security/selinux/avc.c:987
avc_perm_nonode+0xaa/0x170 security/selinux/avc.c:1110
avc_has_perm_noaudit+0x2d2/0x3a0 security/selinux/avc.c:1153
selinux_inode_permission+0x361/0x590 security/selinux/hooks.c:3118
security_inode_permission+0xda/0x260 security/security.c:2319
inode_permission fs/namei.c:600 [inline]
inode_permission+0x17a/0x5f0 fs/namei.c:567
may_lookup fs/namei.c:1819 [inline]
link_path_walk.part.0.constprop.0+0x1d7/0xd40 fs/namei.c:2425
link_path_walk fs/namei.c:2409 [inline]
path_parentat+0xaa/0x1b0 fs/namei.c:2681
__filename_parentat+0x22d/0x680 fs/namei.c:2705
filename_parentat fs/namei.c:2723 [inline]
do_unlinkat+0x106/0x760 fs/namei.c:4562
__do_sys_unlink fs/namei.c:4635 [inline]
__se_sys_unlink fs/namei.c:4633 [inline]
__x64_sys_unlink+0xc5/0x110 fs/namei.c:4633
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: 0033:0x7f02ec5852d7
RSP: 002b:00007fffcc59a828 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f02ec5852d7
RDX: 00007fffcc59a850 RSI: 00007fffcc59a8e0 RDI: 00007fffcc59a8e0
RBP: 00007fffcc59a8e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007fffcc59b960
R13: 00007f02ec601894 R14: 00007fffcc59b9a0 R15: 00000000000000d2
rcu: rcu_preempt kthread starved for 10502 jiffies! g113645 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:27600 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
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:
CPU: 1 UID: 0 PID: 21932 Comm: syz.9.3944 Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x458/0x1300 kernel/smp.c:884
Code: 0c 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 ba 0e 0c 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 a7 0c 00 00 8b 43 08 31
RSP: 0018:ffffc9000e5b7c18 EFLAGS: 00000246
RAX: 0000000000080000 RBX: ffff8880b86469c0 RCX: ffffc9000ea21000
RDX: 0000000000080000 RSI: ffffffff818e0696 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000002 R12: ffffed10170c8d39
R13: 0000000000000001 R14: ffff8880b86469c8 R15: ffff8880b873fe40
FS: 00007f6efa0786c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c36d926 CR3: 00000000649c8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
clock_was_set+0x646/0x850 kernel/time/hrtimer.c:963
do_settimeofday64+0x305/0x4c0 kernel/time/timekeeping.c:1442
do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195
__do_sys_clock_settime kernel/time/posix-timers.c:1135 [inline]
__se_sys_clock_settime kernel/time/posix-timers.c:1119 [inline]
__x64_sys_clock_settime+0x1bf/0x2a0 kernel/time/posix-timers.c:1119
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: 0033:0x7f6ef9185d29
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:00007f6efa078038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007f6ef9375fa0 RCX: 00007f6ef9185d29
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0700000000000000
RBP: 00007f6ef9201aa8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6ef9375fa0 R15: 00007ffd2a61e6a8