rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P15271/1:b..l P6853/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=105469, q=275 ncpus=2)
task:syz-executor.3 state:R running task stack:19160 pid:6853 tgid:6852 ppid:5120 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:rcu_lockdep_current_cpu_online+0x10/0x120 kernel/rcu/tree.c:4657
Code: 00 00 00 00 00 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 65 8b 0d 98 3b 87 7e 01 f7 c1 00 00 f0 00 0f 85 d5 00 00 00 83 3d 93 ad 30 0e 00 0f
RSP: 0018:ffffc90004bb7470 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000080000000
RDX: ffff88802318da00 RSI: ffffffff8c1ff220 RDI: ffffffff8c1ff1e0
RBP: dffffc0000000000 R08: ffffffff8b815817 R09: 1ffffffff25f50b0
R10: dffffc0000000000 R11: fffffbfff25f50b1 R12: ffffc90004bb7560
R13: 0000000000000006 R14: ffff888034175342 R15: ffff88801d487ba0
rcu_read_lock_held_common kernel/rcu/update.c:113 [inline]
rcu_read_lock_held+0x1e/0x50 kernel/rcu/update.c:349
xa_entry include/linux/xarray.h:1220 [inline]
xas_descend lib/xarray.c:207 [inline]
xas_load+0x478/0x5c0 lib/xarray.c:245
filemap_get_entry+0x1fe/0x4e0 mm/filemap.c:1840
__filemap_get_folio+0x65/0xbb0 mm/filemap.c:1885
grow_dev_folio fs/buffer.c:1049 [inline]
grow_buffers fs/buffer.c:1115 [inline]
__getblk_slow fs/buffer.c:1141 [inline]
bdev_getblk+0x201/0x5a0 fs/buffer.c:1443
__bread_gfp+0x86/0x400 fs/buffer.c:1497
sb_bread include/linux/buffer_head.h:347 [inline]
get_branch+0x2c3/0x6e0 fs/sysv/itree.c:102
get_block+0x180/0x16d0 fs/sysv/itree.c:222
block_read_full_folio+0x430/0xe10 fs/buffer.c:2407
filemap_read_folio+0x1a2/0x790 mm/filemap.c:2355
do_read_cache_folio+0x134/0x820 mm/filemap.c:3788
do_read_cache_page+0x30/0x200 mm/filemap.c:3854
read_mapping_page include/linux/pagemap.h:896 [inline]
dir_get_page fs/sysv/dir.c:64 [inline]
sysv_readdir+0x190/0x3e0 fs/sysv/dir.c:92
iterate_dir+0x660/0x820 fs/readdir.c:110
__do_sys_getdents64 fs/readdir.c:409 [inline]
__se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:394
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: 0033:0x7f53f967cee9
RSP: 002b:00007f53fa4dd0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f53f97b3fa0 RCX: 00007f53f967cee9
RDX: 0000000000000018 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f53f96c947f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f53f97b3fa0 R15: 00007fffa5d07c98
task:syz-executor.3 state:R running task stack:26256 pid:15271 tgid:15266 ppid:13138 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 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]
zap_pte_range mm/memory.c:1682 [inline]
zap_pmd_range mm/memory.c:1730 [inline]
zap_pud_range mm/memory.c:1759 [inline]
zap_p4d_range mm/memory.c:1780 [inline]
unmap_page_range+0x4206/0x4d00 mm/memory.c:1801
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1891
exit_mmap+0x264/0xc80 mm/mmap.c:3341
__mmput+0x115/0x3c0 kernel/fork.c:1346
exit_mm+0x220/0x310 kernel/exit.c:565
do_exit+0x9aa/0x27e0 kernel/exit.c:861
do_group_exit+0x207/0x2c0 kernel/exit.c:1023
get_signal+0x16a1/0x1740 kernel/signal.c:2909
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
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: 0033:0x7f14b1c7cee9
RSP: 002b:00007f14b17ff178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f14b1db3fa8 RCX: 00007f14b1c7cee9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f14b1db3fa8
RBP: 00007f14b1db3fa0 R08: 00007f14b17ff6c0 R09: 00007f14b17ff6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f14b1db3fac
R13: 000000000000000b R14: 00007ffee4807070 R15: 00007ffee4807158
rcu: rcu_preempt kthread starved for 10591 jiffies! g105469 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:26448 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 57 Comm: kworker/1:1H Not tainted 6.10.0-rc2-syzkaller-00007-gf06ce441457d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: 0x0 (xfs-log/loop4)
RIP: 0010:signal_wake_up_state+0xa5/0x120 kernel/signal.c:773
Code: 31 ff 89 c6 e8 2c 18 3a 00 85 ed 74 5e e8 e3 13 3a 00 eb 05 e8 dc 13 3a 00 48 89 df be 08 00 00 00 e8 6f d6 9f 00 f0 80 0b 04 <41> 83 ce 01 48 89 df 44 89 f6 e8 9c 5f 0a 00 89 c5 31 ff 89 c6 e8
RSP: 0018:ffffc90000a18c18 EFLAGS: 00000006
RAX: ffffffff815c0201 RBX: ffff88801cf2bc00 RCX: ffffffff815c02b1
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801cf2bc00
RBP: 0000000000000001 R08: ffff88801cf2bc07 R09: 1ffff110039e5780
R10: dffffc0000000000 R11: ffffed10039e5781 R12: ffff88801cf2bc00
R13: ffff88801cf2bc00 R14: 0000000000000000 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3b89591f80 CR3: 00000000667a2000 CR4: 0000000000350ef0
Call Trace:
signal_wake_up include/linux/sched/signal.h:448 [inline]
complete_signal+0x94a/0xcf0 kernel/signal.c:1065
__send_signal_locked+0xb1b/0xdc0 kernel/signal.c:1185
do_send_sig_info kernel/signal.c:1301 [inline]
group_send_sig_info+0x292/0x310 kernel/signal.c:1451
do_bpf_send_signal+0x85/0x190 kernel/trace/bpf_trace.c:838
irq_work_single+0xe4/0x240 kernel/irq_work.c:221
irq_work_run_list kernel/irq_work.c:252 [inline]
irq_work_run+0x18b/0x350 kernel/irq_work.c:261
__sysvec_irq_work+0xb8/0x430 arch/x86/kernel/irq_work.c:22
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0x9e/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738
RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5282
Code: c9 50 e8 99 c9 0b 00 48 83 c4 08 4c 89 f7 e8 cd 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 60 97 2a 0a e8 5b f8 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc
RSP: 0018:ffffc9000132f9a8 EFLAGS: 00000286
RAX: 9ea24fd215a36700 RBX: ffff88801634da00 RCX: ffffffff947a0603
RDX: dffffc0000000000 RSI: ffffffff8bcaba80 RDI: ffffffff8c1ff240
RBP: ffffc9000132f9f0 R08: ffffffff8fad462f R09: 1ffffffff1f5a8c5
R10: dffffc0000000000 R11: fffffbfff1f5a8c6 R12: 1ffff110172a7ea7
R13: dffffc0000000000 R14: ffff8880b953e7c0 R15: ffff8880b953f538
context_switch kernel/sched/core.c:5411 [inline]
__schedule+0x17f0/0x4a20 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:preempt_count_add+0x121/0x190 kernel/sched/core.c:5865
Code: 0e 00 75 19 90 48 c7 c7 80 46 ca 8b 48 c7 c6 c0 46 ca 8b e8 d1 ba f2 ff 90 0f 0b 90 90 90 e9 5c ff ff ff 48 c7 c1 e0 06 7a 94 <80> e1 07 80 c1 03 38 c1 0f 8c fe fe ff ff 48 c7 c7 e0 06 7a 94 e8
RSP: 0018:ffffc9000132fd78 EFLAGS: 00000202
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff947a06e0
RDX: dffffc0000000000 RSI: ffffffff8bcaba80 RDI: 0000000000000001
RBP: ffff88801634da00 R08: ffffffff8fad462f R09: 1ffffffff1f5a8c5
R10: dffffc0000000000 R11: fffffbfff1f5a8c6 R12: dffffc0000000000
R13: ffff8880b953e360 R14: ffffffff8b8f89a0 R15: dffffc0000000000
__schedule_loop kernel/sched/core.c:6821 [inline]
schedule+0x144/0x320 kernel/sched/core.c:6837
worker_thread+0xa2c/0xd70 kernel/workqueue.c:3408
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
sched: RT throttling activated