rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P11549/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=61221, q=650 ncpus=2)
task:syz-executor.5 state:R running task stack:23800 pid:11549 tgid:11547 ppid:10570 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_lock_release include/linux/rcupdate.h:339 [inline]
RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:812 [inline]
RIP: 0010:page_ext_put+0x97/0xc0 mm/page_ext.c:546
Code: ff 88 8e ff c6 05 a8 0a 90 0d 01 48 c7 c7 20 ff d7 8b be 2b 03 00 00 48 c7 c2 a0 01 d8 8b e8 40 28 6b ff 48 8d 35 00 00 00 00 <48> c7 c7 60 3f 33 8e e8 5d ed 6a ff 5b e9 b7 91 75 ff e8 c2 88 8e
RSP: 0018:ffffc9001581f0f0 EFLAGS: 00000287
RAX: ffffffff82078d48 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc9000d282000 RSI: ffffffff82078da7 RDI: 0000000000023a06
RBP: ffff88813fffa7b0 R08: ffffffff82078d36 R09: 1ffff11003092a01
R10: dffffc0000000000 R11: ffffed1003092a02 R12: 0000000000000001
R13: 0000000000000001 R14: ffffea0001877300 R15: 0000000000000000
page_table_check_alloc include/linux/page_table_check.h:33 [inline]
post_alloc_hook+0x206/0x230 mm/page_alloc.c:1469
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
vm_area_alloc_pages mm/vmalloc.c:3566 [inline]
__vmalloc_area_node mm/vmalloc.c:3642 [inline]
__vmalloc_node_range_noprof+0x971/0x1460 mm/vmalloc.c:3823
__vmalloc_node_noprof mm/vmalloc.c:3888 [inline]
vmalloc_noprof+0x79/0x90 mm/vmalloc.c:3921
__snd_dma_alloc_pages sound/core/memalloc.c:39 [inline]
snd_dma_alloc_dir_pages+0x165/0x240 sound/core/memalloc.c:73
do_alloc_pages+0x128/0x260 sound/core/pcm_memory.c:70
snd_pcm_lib_malloc_pages+0x33f/0x760 sound/core/pcm_memory.c:453
snd_pcm_hw_params+0x945/0x1eb0 sound/core/pcm_native.c:773
snd_pcm_oss_change_params_locked+0x2092/0x3d60 sound/core/oss/pcm_oss.c:965
snd_pcm_oss_make_ready_locked sound/core/oss/pcm_oss.c:1187 [inline]
snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1515 [inline]
snd_pcm_oss_read+0x24c/0x940 sound/core/oss/pcm_oss.c:2773
vfs_read+0x206/0xbd0 fs/read_write.c:474
ksys_read+0x1a0/0x2c0 fs/read_write.c:619
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: 0033:0x7f4d6e07cee9
RSP: 002b:00007f4d6ee060c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f4d6e1b3f80 RCX: 00007f4d6e07cee9
RDX: 0000000000001000 RSI: 0000000020000340 RDI: 0000000000000003
RBP: 00007f4d6e0c947f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4d6e1b3f80 R15: 00007ffd2facb248
rcu: rcu_preempt kthread starved for 10562 jiffies! g61221 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:26128 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
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_sub+0x66/0x170 kernel/sched/core.c:5909
Code: c1 81 e1 ff ff ff 7f 39 d9 7c 27 81 fb fe 00 00 00 77 07 0f b6 c0 85 c0 74 5f 65 8b 05 db 49 9e 7e f7 db 65 01 1d d2 49 9e 7e <5b> 41 5e e9 cd b5 4a 0a 90 e8 6c 61 46 03 85 c0 74 3a 48 c7 c0 b0
RSP: 0018:ffffc90000167b50 EFLAGS: 00000257
RAX: 0000000000000001 RBX: 00000000ffffffff RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcaba80 RDI: 0000000000000001
RBP: ffff8880176c8000 R08: ffffffff8fad446f R09: 1ffffffff1f5a88d
R10: dffffc0000000000 R11: fffffbfff1f5a88e R12: dffffc0000000000
R13: 1ffff9200002cf74 R14: dffffc0000000000 R15: ffff8880176c9278
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x155/0x320 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: 11537 Comm: syz-executor.4 Not tainted 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:lockdep_softirqs_on+0xc2/0x5a0 kernel/locking/lockdep.c:4477
Code: 05 e3 69 90 7e 85 c0 0f 85 b4 02 00 00 49 8d 9d dc 0a 00 00 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 89 03 00 00 83 3b 00 <0f> 85 91 02 00 00 48 c7 c0 e0 06 7a 94 48 c1 e8 03 0f b6 04 10 84
RSP: 0018:ffffc90015ca7900 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888060f80adc RCX: ffffffff819d841c
RDX: dffffc0000000000 RSI: ffffffff8c1ff1e0 RDI: ffffffff813680a6
RBP: ffffc90015ca79b0 R08: ffffffff8fad446f R09: 1ffffffff1f5a88d
R10: dffffc0000000000 R11: fffffbfff1f5a88e R12: 1ffff92002b94f24
R13: ffff888060f80000 R14: ffffffff813680a6 R15: 0000000000000200
FS: 00007fd91acca6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f028000 CR3: 000000001ec74000 CR4: 0000000000350ef0
Call Trace:
__local_bh_enable_ip+0x123/0x200 kernel/softirq.c:370
local_bh_enable include/linux/bottom_half.h:33 [inline]
fpregs_unlock arch/x86/include/asm/fpu/api.h:80 [inline]
restore_fpregs_from_user arch/x86/kernel/fpu/signal.c:331 [inline]
__fpu_restore_sig arch/x86/kernel/fpu/signal.c:359 [inline]
fpu__restore_sig+0x969/0x11b0 arch/x86/kernel/fpu/signal.c:493
restore_sigcontext+0x675/0x7d0 arch/x86/kernel/signal_64.c:95
__do_sys_rt_sigreturn+0x17f/0x270 arch/x86/kernel/signal_64.c:263
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: 0033:0x7fd919e7cee7
Code: 14 25 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
RSP: 002b:00007fd91acca178 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fd919fb3f88 RCX: 00007fd919e7cee9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fd919fb3f88
RBP: 00007fd919fb3f80 R08: 00007fd91acca6c0 R09: 00007fd91acca6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd919fb3f8c
R13: 000000000000000b R14: 00007fff4c7f39d0 R15: 00007fff4c7f3ab8