rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=9a0c/1/0x4000000000000000 softirq=98169/98170 fqs=4
rcu: (detected by 1, t=10502 jiffies, g=176485, q=151 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4032 Comm: syz-executor.1 Not tainted 6.7.0-rc6-syzkaller-00044-g1a44b0073b92 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__lock_acquire+0x16b/0x3b20 kernel/locking/lockdep.c:5038
Code: 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e fb 12 00 00 48 8b 04 24 48 c7 c2 e0 e5 7f 92 48 c1 ea 03 8b 80 b8 0a 00 00 89 44 24 10 <48> b8 00 00 00 00 00 fc ff df 0f b6 14 02 48 c7 c0 e0 e5 7f 92 83
RSP: 0018:ffffc90000007bf0 EFLAGS: 00000802
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 1ffffffff24ffcbc RSI: ffff888033b560c0 RDI: ffff8880b982b960
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f186a97 R11: 0000000000000001 R12: 0000000000000000
R13: ffff8880b982b958 R14: 0000000000000000 R15: ffffffff91f158c0
FS: 00007f3e29bd36c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb9e0577198 CR3: 0000000051730000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
__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:1692 [inline]
__hrtimer_run_queues+0x2bd/0xc20 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
__sysvec_apic_timer_interrupt+0x105/0x400 arch/x86/kernel/apic/apic.c:1082
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 86 47 e4 f6 48 89 df e8 ee be e4 f6 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 25 78 d6 f6 65 8b 05 a6 20 81 75 85 c0 74 12 5b
RSP: 0018:ffffc90003c87a40 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffff888017396c88 RCX: 1ffffffff1e30701
RDX: 0000000000000000 RSI: ffffffff8acc9f40 RDI: ffffffff8b2ed2a0
RBP: 0000000000000287 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f186a97 R11: 0000000000000000 R12: dffffc0000000000
R13: 197f8be1079a0c3f R14: 17a2b591079a0c3f R15: ffff888017396c88
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
timerfd_clock_was_set+0x164/0x310 fs/timerfd.c:113
clock_was_set+0x67d/0x850 kernel/time/hrtimer.c:982
timekeeping_inject_offset+0x4d1/0x640 kernel/time/timekeeping.c:1395
do_adjtimex+0x373/0xaa0 kernel/time/timekeeping.c:2444
do_clock_adjtime kernel/time/posix-timers.c:1159 [inline]
__do_sys_clock_adjtime+0x173/0x280 kernel/time/posix-timers.c:1171
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f3e28e7cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3e29bd30c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f3e28f9c050 RCX: 00007f3e28e7cce9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f3e28ec947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f3e28f9c050 R15: 00007ffc01e3ec88
rcu: rcu_preempt kthread starved for 10494 jiffies! g176485 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:25216 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_timeout+0x137/0x290 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1830
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 20544 Comm: syz-executor.5 Not tainted 6.7.0-rc6-syzkaller-00044-g1a44b0073b92 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__sanitizer_cov_trace_pc+0x34/0x60 kernel/kcov.c:207
Code: bd 03 00 65 8b 05 74 5b 7d 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 fc 15 00 00 85 c0 74 2b 8b 82 d8 15 00 00 <83> f8 02 75 20 48 8b 8a e0 15 00 00 8b 92 dc 15 00 00 48 8b 01 48
RSP: 0018:ffffc90004f17b78 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b98414c0 RCX: ffffffff817aaaa8
RDX: ffff888078e0c140 RSI: ffffffff817aaa82 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffed1017308299
R13: 0000000000000001 R14: ffff8880b98414c8 R15: ffff8880b993d900
FS: 0000555556059480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc18677a038 CR3: 000000003c297000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
csd_lock_wait kernel/smp.c:311 [inline]
smp_call_function_many_cond+0x4e2/0x1550 kernel/smp.c:855
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1023
kill_bdev block/bdev.c:75 [inline]
blkdev_flush_mapping+0x143/0x310 block/bdev.c:632
blkdev_put_whole+0xb9/0xe0 block/bdev.c:663
blkdev_put+0x40f/0x8e0 block/bdev.c:944
bdev_release+0x4f/0x80 block/bdev.c:954
kill_block_super+0x77/0x90 fs/super.c:1670
ext4_kill_sb+0x6a/0xb0 fs/ext4/super.c:7330
deactivate_locked_super+0xbc/0x1a0 fs/super.c:484
deactivate_super+0xde/0x100 fs/super.c:517
cleanup_mnt+0x222/0x450 fs/namespace.c:1256
task_work_run+0x14d/0x240 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x217/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1e/0x60 kernel/entry/common.c:296
do_syscall_64+0x4d/0x110 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fecbee7e017
Code: b0 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 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd4ae89978 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fecbee7e017
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffd4ae89a30
RBP: 00007ffd4ae89a30 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd4ae8aaf0
R13: 00007fecbeec83b9 R14: 00000000002fe7d1 R15: 0000000000000001