rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10465/1:b..l P10445/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=63753, q=332 ncpus=2)
task:syz-executor.2 state:R running task stack:25424 pid:10445 tgid:10442 ppid:8521 flags:0x00004002
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:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:rcu_lockdep_current_cpu_online+0x9/0x120 kernel/rcu/tree.c:4657
Code: ff ff 66 2e 0f 1f 84 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 2b 87 7e b0 01 f7 c1 00 00 f0 00 0f 85 d5 00 00 00 83
RSP: 0018:ffffc900043c7240 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff888027f88000
RDX: ffffc90003c02000 RSI: ffffffff8c1ff360 RDI: ffffffff8c1ff320
RBP: 0000000000000140 R08: ffffffff82079d5e R09: 1ffffffff25f56b0
R10: dffffc0000000000 R11: fffffbfff25f56b1 R12: 00000000000501fb
R13: 0000000000000001 R14: ffffffff82079c90 R15: ffff888016300000
rcu_read_lock_held_common kernel/rcu/update.c:113 [inline]
rcu_read_lock_held+0x1e/0x50 kernel/rcu/update.c:349
lookup_page_ext mm/page_ext.c:253 [inline]
page_ext_get+0x192/0x2a0 mm/page_ext.c:522
__set_page_owner+0x9e/0x800 mm/page_owner.c:322
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468
prep_new_page mm/page_alloc.c:1476 [inline]
get_page_from_freelist+0x2e2d/0x2ee0 mm/page_alloc.c:3402
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4660
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
shmem_alloc_folio mm/shmem.c:1628 [inline]
shmem_alloc_and_add_folio+0x24d/0xdb0 mm/shmem.c:1668
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: 0033:0x7f399bc7bcaf
RSP: 002b:00007f399ca4ce80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f399bc7bcaf
RDX: 0000000001000000 RSI: 00007f3991a00000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000005d71
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f399ca4cf80 R14: 00007f399ca4cf40 R15: 00007f3991a00000
task:syz-executor.3 state:R running task stack:22512 pid:10465 tgid:10461 ppid:9973 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
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:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1088 [inline]
free_unref_page+0xd22/0xea0 mm/page_alloc.c:2565
vfree+0x186/0x2e0 mm/vmalloc.c:3346
vb2_vmalloc_put+0x68/0xb0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:68
__vb2_buf_mem_free+0xfc/0x2a0 drivers/media/common/videobuf2/videobuf2-core.c:276
__vb2_free_mem drivers/media/common/videobuf2/videobuf2-core.c:558 [inline]
__vb2_queue_free+0x450/0xed0 drivers/media/common/videobuf2/videobuf2-core.c:586
vb2_core_queue_release+0x6c/0x150 drivers/media/common/videobuf2/videobuf2-core.c:2655
vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:957 [inline]
_vb2_fop_release drivers/media/common/videobuf2/videobuf2-v4l2.c:1159 [inline]
vb2_fop_release+0x171/0x200 drivers/media/common/videobuf2/videobuf2-v4l2.c:1173
v4l2_release+0x1fa/0x3b0 drivers/media/v4l2-core/v4l2-dev.c:456
__fput+0x408/0x8b0 fs/file_table.c:422
task_work_run+0x251/0x310 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+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcaa6c7cf69
RSP: 002b:00007fcaa79180c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007fcaa6db4120 RCX: 00007fcaa6c7cf69
RDX: 00000000200000c0 RSI: 00000000c0145608 RDI: 0000000000000009
RBP: 00007fcaa6cda6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fcaa6db4120 R15: 00007ffcdc8d6dd8
rcu: rcu_preempt kthread starved for 10589 jiffies! g63753 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:25232 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:
CPU: 1 PID: 10477 Comm: syz-executor.4 Not tainted 6.10.0-rc2-syzkaller-00235-g8a92980606e3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 6e 85 6a f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 33 37 d4 f5 65 8b 05 64 71 72 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc90004477b80 EFLAGS: 00000206
RAX: 509d738b6e103d00 RBX: 1ffff9200088ef74 RCX: ffffffff947a3603
RDX: dffffc0000000000 RSI: ffffffff8bcabb80 RDI: 0000000000000001
RBP: ffffc90004477c10 R08: ffffffff8fad4b6f R09: 1ffffffff1f5a96d
R10: dffffc0000000000 R11: fffffbfff1f5a96e R12: dffffc0000000000
R13: 1ffff9200088ef70 R14: ffffc90004477ba0 R15: 0000000000000246
FS: 00007f161df136c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f161df12f00 CR3: 000000006481e000 CR4: 0000000000350ef0
Call Trace:
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
unlock_task_sighand include/linux/sched/signal.h:754 [inline]
do_send_sig_info kernel/signal.c:1302 [inline]
group_send_sig_info+0x2e0/0x310 kernel/signal.c:1451
bpf_send_signal_common+0x2dd/0x430 kernel/trace/bpf_trace.c:881
____bpf_send_signal kernel/trace/bpf_trace.c:886 [inline]
bpf_send_signal+0x19/0x30 kernel/trace/bpf_trace.c:884
bpf_prog_8cc4ff36b5985b6a+0x1d/0x23
bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
__bpf_prog_run include/linux/filter.h:691 [inline]
bpf_prog_run include/linux/filter.h:698 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2403 [inline]
bpf_trace_run2+0x2ee/0x540 kernel/trace/bpf_trace.c:2444
trace_sys_exit include/trace/events/syscalls.h:44 [inline]
syscall_exit_work+0x171/0x190 kernel/entry/common.c:169
syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]
syscall_exit_to_user_mode+0x273/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f161d27cf69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f161df130c8 EFLAGS: 00000246
RAX: 0000000020000000 RBX: 00007f161d3b3f80 RCX: 00007f161d27cf69
RDX: b635773f06ebbeef RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f161d2da6fe R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f161d3b3f80 R15: 00007ffeb0b97c58