rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5683/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=11681, q=841 ncpus=2)
task:syz-executor.0 state:R running task stack:22656 pid:5683 tgid:5682 ppid:5126 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 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:lock_is_held_type+0x13b/0x190
Code: 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 42 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc90002ebf5a8 EFLAGS: 00000206
RAX: 1882e7519b99a300 RBX: 0000000000000000 RCX: 0000000080000000
RDX: ffff8880272e8000 RSI: ffffffff8bcacc00 RDI: ffffffff8c1ff140
RBP: 0000000000000003 R08: ffffffff849970ed R09: 1ffffffff25f50b0
R10: dffffc0000000000 R11: fffffbfff25f50b1 R12: 0000000000000246
R13: ffff8880272e8000 R14: 00000000ffffffff R15: ffffffff8e361fd8
lock_is_held include/linux/lockdep.h:231 [inline]
task_css include/linux/cgroup.h:434 [inline]
blkcg_css+0xc9/0x1d0 block/blk-cgroup.c:110
blk_cgroup_congested+0xbd/0x220 block/blk-cgroup.c:2189
__folio_throttle_swaprate+0x84/0x1d0 mm/swapfile.c:3695
folio_throttle_swaprate include/linux/swap.h:632 [inline]
shmem_add_to_page_cache+0x89c/0x1830 mm/shmem.c:778
shmem_alloc_and_add_folio+0x46c/0xdb0 mm/shmem.c:1689
shmem_get_folio_gfp+0x82d/0x1f50 mm/shmem.c:2055
shmem_get_folio mm/shmem.c:2160 [inline]
shmem_write_begin+0x170/0x4d0 mm/shmem.c:2743
generic_perform_write+0x324/0x640 mm/filemap.c:4015
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2919
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa74/0xc90 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+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f24af87bc2f
RSP: 002b:00007f24b05ade80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f24af87bc2f
RDX: 0000000001000000 RSI: 00007f24a5600000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000005598
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f24b05adf80 R14: 00007f24b05adf40 R15: 00007f24a5600000
rcu: rcu_preempt kthread starved for 10529 jiffies! g11681 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:24688 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 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+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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: 5697 Comm: syz-executor.4 Not tainted 6.9.0-syzkaller-12400-g6fbf71854e2d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:lockdep_hardirqs_on_prepare+0x4/0x780 kernel/locking/lockdep.c:4312
Code: 62 be 89 00 e9 43 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 00
RSP: 0018:ffffc9001537fb60 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffff888020c3b780 RCX: ffffffff819d825c
RDX: 0000000000000000 RSI: ffffffff8c1ff120 RDI: ffffffff8c1ff0e0
RBP: ffffc9001537fc50 R08: ffffffff8fad43af R09: 1ffffffff1f5a875
R10: dffffc0000000000 R11: fffffbfff1f5a876 R12: 1ffff110043bcc64
R13: ffff888021de6318 R14: 0000000100000000 R15: ffff888021de5a00
FS: 00007f5ddd26a6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44c0106f80 CR3: 000000007c094000 CR4: 0000000000350ef0
Call Trace:
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
_raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:401 [inline]
__set_current_blocked+0x310/0x380 kernel/signal.c:3099
set_current_blocked kernel/signal.c:3083 [inline]
signal_delivered kernel/signal.c:2945 [inline]
signal_setup_done+0x39e/0x600 kernel/signal.c:2957
handle_signal arch/x86/kernel/signal.c:285 [inline]
arch_do_signal_or_restart+0x51f/0x860 arch/x86/kernel/signal.c:312
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ddc4a4670
Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d 3a 9b 04 00 e8 25 78 fa ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48
RSP: 002b:00007f5ddd269bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00007f5ddc5abf88 RCX: 00007f5ddc47cee9
RDX: 00007f5ddd269bc0 RSI: 00007f5ddd269cf0 RDI: 0000000000000021
RBP: 00007f5ddc5abf80 R08: 00007f5ddd26a6c0 R09: 00007f5ddd26a6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5ddc5abf8c
R13: 000000000000000b R14: 00007ffee5f333f0 R15: 00007ffee5f334d8