rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (0 ticks this GP) idle=3404/1/0x4000000000000000 softirq=77214/77214 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P20042/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=119249, q=302 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 20050 Comm: syz-executor.1 Not tainted 6.9.0-rc7-syzkaller-00012-gdccb07f2914c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
RIP: 0010:rcu_is_watching+0x3a/0xb0 kernel/rcu/tree.c:700
Code: e8 8b 40 fb 09 89 c3 83 f8 08 73 7a 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd e0 a9 d3 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 <74> 08 4c 89 f7 e8 cc 08 7b 00 48 c7 c3 c8 7c 03 00 49 03 1e 48 89
RSP: 0018:ffffc90000007a20 EFLAGS: 00000046
RAX: 1ffffffff1ba753c RBX: 0000000000000000 RCX: ffffffff81728454
RDX: 0000000000000000 RSI: ffffffff8c1eac80 RDI: ffffffff8c1eac40
RBP: ffffc90000007b88 R08: ffffffff8fa7cb6f R09: 1ffffffff1f4f96d
R10: dffffc0000000000 R11: fffffbfff1f4f96e R12: 1ffff92000000f50
R13: dffffc0000000000 R14: ffffffff8dd3a9e0 R15: dffffc0000000000
FS: 00007fdff0fea6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d724000 CR3: 000000006047c000 CR4: 00000000003506f0
Call Trace:
trace_lock_acquire include/trace/events/lock.h:24 [inline]
lock_acquire+0xe3/0x550 kernel/locking/lockdep.c:5725
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_deactivate+0x158/0x390 lib/debugobjects.c:763
debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:484
__run_hrtimer kernel/time/hrtimer.c:1660 [inline]
__hrtimer_run_queues+0x30f/0xd50 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:preempt_latency_start kernel/sched/core.c:5851 [inline]
RIP: 0010:preempt_count_add+0x76/0x190 kernel/sched/core.c:5877
Code: c1 e8 03 42 0f b6 04 38 84 c0 0f 85 e4 00 00 00 83 3d 6d b8 09 13 00 75 11 65 8b 05 8c 25 9e 7e 0f b6 c0 3d f5 00 00 00 73 5e <65> 8b 05 7b 25 9e 7e 25 ff ff ff 7f 39 d8 75 44 4c 8b 74 24 18 4c
RSP: 0018:ffffc90009736fe8 EFLAGS: 00000297
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff946f6603
RDX: ffff88801bf93c00 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc900097370e0 R08: ffffffff81414011 R09: ffffc900097371d0
R10: 0000000000000003 R11: ffffffff8181e6d0 R12: ffff88801bf93c00
R13: dffffc0000000000 R14: 0000000000000001 R15: dffffc0000000000
unwind_next_frame+0xc1/0x2a00 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3804 [inline]
slab_alloc_node mm/slub.c:3851 [inline]
kmem_cache_alloc+0x174/0x350 mm/slub.c:3858
kmem_cache_zalloc include/linux/slab.h:739 [inline]
__kernfs_new_node+0xd8/0x870 fs/kernfs/dir.c:624
kernfs_new_node+0x137/0x240 fs/kernfs/dir.c:700
__kernfs_create_file+0x49/0x2e0 fs/kernfs/file.c:1034
sysfs_add_file_mode_ns+0x24a/0x310 fs/sysfs/file.c:307
sysfs_create_file_ns fs/sysfs/file.c:368 [inline]
sysfs_create_file include/linux/sysfs.h:743 [inline]
sysfs_create_files+0x1d9/0x470 fs/sysfs/file.c:378
btrfs_sysfs_add_mounted+0x563/0x5a0 fs/btrfs/sysfs.c:2136
open_ctree+0x1bc2/0x2a00 fs/btrfs/disk-io.c:3474
btrfs_fill_super fs/btrfs/super.c:938 [inline]
btrfs_get_tree_super fs/btrfs/super.c:1858 [inline]
btrfs_get_tree+0xe7a/0x1920 fs/btrfs/super.c:2084
vfs_get_tree+0x90/0x2a0 fs/super.c:1779
fc_mount+0x1b/0xb0 fs/namespace.c:1125
btrfs_get_tree_subvol fs/btrfs/super.c:2047 [inline]
btrfs_get_tree+0x652/0x1920 fs/btrfs/super.c:2085
vfs_get_tree+0x90/0x2a0 fs/super.c:1779
do_new_mount+0x2be/0xb40 fs/namespace.c:3352
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdff027f46a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007fdff0fe9ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fdff0fe9f80 RCX: 00007fdff027f46a
RDX: 0000000020000000 RSI: 00000000200015c0 RDI: 00007fdff0fe9f40
RBP: 0000000020000000 R08: 00007fdff0fe9f80 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200015c0
R13: 00007fdff0fe9f40 R14: 000000000000559e R15: 0000000020001600
task:syz-executor.2 state:R running task stack:25208 pid:20042 tgid:20039 ppid:18373 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6925
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6949
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
unwind_next_frame+0x2124/0x2a00 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x75/0x3f0 mm/page_owner.c:302
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347
free_unref_folios+0x1f2/0xc10 mm/page_alloc.c:2536
folios_put_refs+0x93a/0xa60 mm/swap.c:1034
folio_batch_release include/linux/pagevec.h:101 [inline]
shmem_undo_range+0x6d9/0x1df0 mm/shmem.c:1005
shmem_truncate_range mm/shmem.c:1114 [inline]
shmem_evict_inode+0x29b/0xa60 mm/shmem.c:1242
evict+0x2a8/0x630 fs/inode.c:667
__dentry_kill+0x20d/0x630 fs/dcache.c:603
dput+0x19f/0x2b0 fs/dcache.c:845
__fput+0x678/0x8a0 fs/file_table.c:430
task_work_run+0x24f/0x310 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd44f67dacb
RSP: 002b:00007fd4503cfea0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 00007fd44f67dacb
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000d
R13: 00007fd4503cff40 R14: 0000000000005d5e R15: 0000000020005ec0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g119249 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=58236
rcu: rcu_preempt kthread starved for 10502 jiffies! g119249 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:24560 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244