rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10404/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=37421, q=218 ncpus=2)
task:syz.8.1539 state:R running task stack:22856 pid:10404 tgid:10402 ppid:10005 task_flags:0x400040 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288
irqentry_exit+0x6f/0x90 kernel/entry/common.c:197
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x2b5/0x3e0 kernel/locking/lockdep.c:5893
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 7b d1 02 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000aca7008 EFLAGS: 00000206
RAX: 97eae2d5f28c3400 RBX: 0000000000000202 RCX: 97eae2d5f28c3400
RDX: 0000000000000002 RSI: ffffffff8dba5f95 RDI: ffffffff8be33380
RBP: ffff88802f35c740 R08: 0000000000000000 R09: ffffffff81cea1f6
R10: dffffc0000000000 R11: ffffffff81ac3890 R12: 0000000000000002
R13: 0000000000000002 R14: ffffffff8e139ee0 R15: ffff88802f35bc00
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
is_bpf_text_address+0x28d/0x2b0 kernel/bpf/core.c:778
kernel_text_address+0xa5/0xe0 kernel/extable.c:125
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf5/0x1f0 mm/page_owner.c:156
__set_page_owner+0x8d/0x4a0 mm/page_owner.c:329
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851
prep_new_page mm/page_alloc.c:1859 [inline]
get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
folio_alloc_mpol_noprof+0x39/0x70 mm/mempolicy.c:2435
shmem_alloc_folio mm/shmem.c:1908 [inline]
shmem_alloc_and_add_folio+0x447/0xf60 mm/shmem.c:1947
shmem_get_folio_gfp+0x59d/0x1660 mm/shmem.c:2597
shmem_get_folio mm/shmem.c:2703 [inline]
shmem_write_begin+0xf7/0x2b0 mm/shmem.c:3353
generic_perform_write+0x2c5/0x900 mm/filemap.c:4175
shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3528
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feaef58d69f
RSP: 002b:00007feaf045edf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000013bd7ef RCX: 00007feaef58d69f
RDX: 00000000013bd7ef RSI: 00007feae5200000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000054ff
R10: 00000000000003c8 R11: 0000000000000293 R12: 0000000000000003
R13: 00007feaf045eef0 R14: 00007feaf045eeb0 R15: 00007feae5200000
rcu: rcu_preempt kthread timer wakeup didn't happen for 10502 jiffies! g37421 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=18795
rcu: rcu_preempt kthread starved for 10503 jiffies! g37421 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:27336 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10430 Comm: syz.7.1552 Not tainted 6.17.0-rc1-syzkaller-00004-g53e760d89498 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:hrtimer_get_softexpires_tv64 include/linux/hrtimer.h:149 [inline]
RIP: 0010:__hrtimer_run_queues+0x229/0xc60 kernel/time/hrtimer.c:1822
Code: 4c 24 20 48 c1 e9 03 48 89 4c 24 30 4c 89 7c 24 60 48 8b 9c 24 e0 00 00 00 4d 8d 74 24 20 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 f7 e8 fd 68 75 00 4d 8b 36 48 89 df 4c 89 f6 e8 1f fe
RSP: 0018:ffffc90000007d40 EFLAGS: 00000046
RAX: 1ffff11005d8ea6c RBX: 1bc16d674eec6bfd RCX: ffff88804d135a00
RDX: 0000000000010000 RSI: 1ffff110170c4f92 RDI: ffff88802ec75340
RBP: ffffc90000007e90 R08: ffff88802ec75357 R09: ffff88802ec75340
R10: dffffc0000000000 R11: ffffed1005d8ea6b R12: ffff88802ec75340
R13: dffffc0000000000 R14: ffff88802ec75360 R15: ffff8880b8627c80
FS: 0000000000000000(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000040 CR3: 000000004b8dc000 CR4: 0000000000350ef0
Call Trace:
hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
__sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1056
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:unmap_page_range+0x1614/0x4370 mm/memory.c:-1
Code: 18 01 00 00 49 89 dc 80 3c 18 00 74 08 4c 89 f7 e8 81 cf 19 00 49 8b 1e 83 e3 40 31 ff 48 89 de e8 21 67 b6 ff bf 01 00 00 00 <4c> 8b 7c 24 78 44 89 fe e8 6f 66 b6 ff 41 83 ff 01 4c 89 74 24 58
RSP: 0018:ffffc9000ba4f3a0 EFLAGS: 00000293
RAX: ffffffff8209496f RBX: 0000000000000000 RCX: ffff88804d135a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc9000ba4f650 R08: ffffea000139f447 R09: 1ffffd4000273e88
R10: dffffc0000000000 R11: fffff94000273e89 R12: dffffc0000000000
R13: ffffc9000ba4f860 R14: ffffea000139f440 R15: ffffc9000ba4f860
unmap_single_vma mm/memory.c:1932 [inline]
unmap_vmas+0x399/0x580 mm/memory.c:1976
exit_mmap+0x248/0xb50 mm/mmap.c:1280
__mmput+0x118/0x420 kernel/fork.c:1130
exit_mm+0x1da/0x2c0 kernel/exit.c:582
do_exit+0x648/0x2300 kernel/exit.c:949
do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
get_signal+0x1286/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4eebd8ebe9
Code: Unable to access opcode bytes at 0x7f4eebd8ebbf.
RSP: 002b:00007f4eecbbe0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f4eebfb5fa8 RCX: 00007f4eebd8ebe9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f4eebfb5fac
RBP: 00007f4eebfb5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4eebfb6038 R14: 00007fff204d8ad0 R15: 00007fff204d8bb8