rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P20088/1:b..l
(detected by 0, t=10502 jiffies, g=88833, q=168)
task:syz-executor.4 state:R running task stack:24216 pid:20088 ppid: 3527 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6372
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:6548
preempt_schedule+0xd9/0xe0 kernel/sched/core.c:6573
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
_raw_spin_unlock_irq+0x3c/0x40 kernel/locking/spinlock.c:202
spin_unlock_irq include/linux/spinlock.h:413 [inline]
loop_queue_work drivers/block/loop.c:1068 [inline]
loop_queue_rq+0x9f7/0xae0 drivers/block/loop.c:2201
__blk_mq_issue_directly block/blk-mq.c:1992 [inline]
__blk_mq_try_issue_directly+0x541/0x8b0 block/blk-mq.c:2048
blk_mq_try_issue_directly+0x116/0x370 block/blk-mq.c:2079
blk_mq_submit_bio+0x11bb/0x1c40 block/blk-mq.c:2301
__submit_bio+0x813/0x850 block/blk-core.c:921
__submit_bio_noacct_mq block/blk-core.c:1001 [inline]
submit_bio_noacct+0x955/0xb30 block/blk-core.c:1031
submit_bio+0x2dd/0x560 block/blk-core.c:1093
submit_bh fs/buffer.c:3062 [inline]
__bread_slow fs/buffer.c:1180 [inline]
__bread_gfp+0x1c2/0x390 fs/buffer.c:1384
sb_bread include/linux/buffer_head.h:337 [inline]
ntfs_bread fs/ntfs3/ntfs_fs.h:1017 [inline]
ntfs_read_run_nb+0x51c/0xe60 fs/ntfs3/fsntfs.c:1202
ntfs_read_bh+0x3c/0x770 fs/ntfs3/fsntfs.c:1270
mi_read+0x1e9/0x5a0 fs/ntfs3/record.c:133
ntfs_read_mft fs/ntfs3/inode.c:69 [inline]
ntfs_iget5+0x483/0x3900 fs/ntfs3/inode.c:524
ntfs_extend_init+0x11b/0x530 fs/ntfs3/fsntfs.c:199
ntfs_fill_super+0x40b9/0x4450 fs/ntfs3/super.c:1238
get_tree_bdev+0x3fe/0x620 fs/super.c:1312
vfs_get_tree+0x88/0x270 fs/super.c:1517
do_new_mount+0x28b/0xae0 fs/namespace.c:2994
do_mount fs/namespace.c:3337 [inline]
__do_sys_mount fs/namespace.c:3545 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3522
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fe4653031ea
RSP: 002b:00007fe463882ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe463882f80 RCX: 00007fe4653031ea
RDX: 000000002001f740 RSI: 000000002001f780 RDI: 00007fe463882f40
RBP: 000000002001f740 R08: 00007fe463882f80 R09: 0000000002010000
R10: 0000000002010000 R11: 0000000000000202 R12: 000000002001f780
R13: 00007fe463882f40 R14: 000000000001f726 R15: 0000000020000280
rcu: rcu_preempt kthread starved for 10539 jiffies! g88833 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:26080 pid: 15 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884
rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1959
rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2132
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
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: 20067 Comm: syz-executor.1 Not tainted 5.15.137-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:132 [inline]
RIP: 0010:lock_acquire+0x220/0x4f0 kernel/locking/lockdep.c:5625
Code: 9f 7e 83 f8 01 0f 85 a4 01 00 00 49 89 de 48 c1 eb 03 42 80 3c 2b 00 74 08 4c 89 f7 e8 a9 59 67 00 48 c7 44 24 60 00 00 00 00 <9c> 8f 44 24 60 42 80 3c 2b 00 74 08 4c 89 f7 e8 0c 59 67 00 f6 44
RSP: 0018:ffffc90000dd0cc0 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff920001ba1a4 RCX: ffffffff816335e2
RDX: dffffc0000000000 RSI: ffffffff8a8b1e80 RDI: ffffffff8ad87b40
RBP: ffffc90000dd0e08 R08: dffffc0000000000 R09: fffffbfff1f79a22
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001ba1a0
R13: dffffc0000000000 R14: ffffc90000dd0d20 R15: 0000000000000046
FS: 0000555556b7e480(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f821000 CR3: 00000000312e5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
hrtimer_interrupt+0xf7/0x980 kernel/time/hrtimer.c:1792
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: b1 7e f6 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ae b8 3d f7 48 89 df e8 06 0c 3f f7 e8 91 b9 61 f7 fb bf 01 00 00 00 26 4a 32 f7 65 8b 05 b7 85 dd 75 85 c0 74 02 5b c3 e8 44 9d db
RSP: 0018:ffffc9000389fbc0 EFLAGS: 00000282
RAX: 2c93ed9b1618c100 RBX: ffff888023559280 RCX: ffffffff913c5003
RDX: dffffc0000000000 RSI: ffffffff8a8b0be0 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff8186a3c0 R09: ffffed10046ab251
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000021
R13: dffffc0000000000 R14: ffff888023559718 R15: ffff888023559280
spin_unlock_irq include/linux/spinlock.h:413 [inline]
get_signal+0x13ee/0x14e0 kernel/signal.c:2892
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fdafa3295d4
Code: 0f 82 b9 00 00 00 48 39 f2 72 6e 41 0f 11 0c 24 48 8b 77 f8 48 89 f8 48 89 eb eb 12 66 2e 0f 1f 84 00 00 00 00 00 48 8b 4b 08 <48> 83 c3 08 48 39 d1 72 f3 48 83 e8 08 48 39 f2 73 17 66 2e 0f 1f
RSP: 002b:00007ffc64c68020 EFLAGS: 00000297
RAX: 00007fdaf9cff190 RBX: 00007fdaf9cfefd8 RCX: ffffffff81b9669d
RDX: ffffffff81b9669d RSI: ffffffff81b966d5 RDI: 00007fdaf9cff738
RBP: 00007fdaf9cfe7f0 R08: 00007fdaf9cfef90 R09: 00000000000000b9
R10: 0000000081a6dc35 R11: 0000000000000246 R12: 00007fdaf9cfe7e8
R13: 0000000000000013 R14: 00007fdafa481000 R15: 00007fdafa48d018