rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8025/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=27649, q=419 ncpus=2)
task:syz-executor.2 state:R running task stack:25088 pid:8025 tgid:8024 ppid:5109 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
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:ffffc90010e17548 EFLAGS: 00000206
RAX: 15345380738bd300 RBX: 0000000000000000 RCX: 0000000080000000
RDX: ffff88802f2c9e00 RSI: ffffffff8bcad360 RDI: ffffffff8c200e00
RBP: 0000000000000003 R08: ffffffff849bfa8d R09: 1ffffffff25f92d8
R10: dffffc0000000000 R11: fffffbfff25f92d9 R12: 0000000000000246
R13: ffff88802f2c9e00 R14: 00000000ffffffff R15: ffffffff8e3626d8
lock_is_held include/linux/lockdep.h:231 [inline]
task_css include/linux/cgroup.h:433 [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:3732
folio_throttle_swaprate include/linux/swap.h:640 [inline]
shmem_add_to_page_cache+0x89c/0x1830 mm/shmem.c:786
shmem_alloc_and_add_folio+0x90e/0x14e0 mm/shmem.c:1811
shmem_get_folio_gfp+0xa22/0x2660 mm/shmem.c:2189
shmem_get_folio mm/shmem.c:2294 [inline]
shmem_write_begin+0x170/0x4d0 mm/shmem.c:2899
generic_perform_write+0x322/0x640 mm/filemap.c:4016
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:3075
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 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: 0033:0x7efe0d27bcaf
RSP: 002b:00007efe0e054e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000013bd7ef RCX: 00007efe0d27bcaf
RDX: 00000000013bd7ef RSI: 00007efe03000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000005535
R10: 000000002000ac02 R11: 0000000000000293 R12: 0000000000000003
R13: 00007efe0e054f80 R14: 00007efe0e054f40 R15: 00007efe03000000
rcu: rcu_preempt kthread starved for 10534 jiffies! g27649 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:26448 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2029
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2231
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
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: 5080 Comm: syz-fuzzer Not tainted 6.10.0-rc2-next-20240607-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:229 [inline]
RIP: 0010:__lock_acquire+0x1280/0x2000 kernel/locking/lockdep.c:5191
Code: 10 8b 18 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 c0 96 fc 92 be 08 00 00 00 e8 c8 03 8a 00 48 0f a3 1d 00 26 8a 11 <73> 1d 48 69 c3 c8 00 00 00 48 8d 98 c0 f5 ca 92 48 ba 00 00 00 00
RSP: 0018:ffffc90003b67550 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 000000000000003e RCX: ffffffff817270b8
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff92fc96c0
RBP: dccfe6a69997a60d R08: ffffffff92fc96c7 R09: 1ffffffff25f92d8
R10: dffffc0000000000 R11: fffffbfff25f92d9 R12: ffff888070701e00
R13: ffff8880707028d8 R14: 1ffff1100e0e0520 R15: 0000000000000001
FS: 000000c00005a090(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32b33000 CR3: 000000001e36e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5817
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
raw_spin_rq_lock kernel/sched/sched.h:1414 [inline]
rq_lock kernel/sched/sched.h:1713 [inline]
__schedule+0x357/0x4a20 kernel/sched/core.c:6437
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
futex_wait_queue+0x14e/0x1d0 kernel/futex/waitwake.c:370
__futex_wait+0x17f/0x320 kernel/futex/waitwake.c:669
futex_wait+0x101/0x360 kernel/futex/waitwake.c:697
do_futex+0x33b/0x560 kernel/futex/syscalls.c:102
__do_sys_futex kernel/futex/syscalls.c:179 [inline]
__se_sys_futex+0x3f9/0x480 kernel/futex/syscalls.c:160
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: 0033:0x473523
Code: 24 20 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14 4c 8b 54 24 18 4c 8b 44 24 20 44 8b 4c 24 28 b8 ca 00 00 00 0f 05 <89> 44 24 30 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 002b:000000c00006be80 EFLAGS: 00000206 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000473523
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000025cdce0
RBP: 000000c00006bec8 R08: 0000000000000000 R09: 0000000000000000
R10: 000000c00006beb8 R11: 0000000000000206 R12: 000000c00006beb8
R13: 000000c0000e4000 R14: 000000c0000064e0 R15: 0000000000000009