rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P20439/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=96589, q=280 ncpus=2)
task:syz.9.3475 state:R running task stack:25680 pid:20439 tgid:20438 ppid:19877 task_flags:0x400140 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7087
irqentry_exit+0x36/0x90 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:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xc/0x70 kernel/kcov.c:217
Code: cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 74 f7 49 7e <65> 8b 05 75 f7 49 7e a9 00 01 ff 00 48 8b 34 24 74 1d f6 c4 01 74
RSP: 0018:ffffc9000507faf0 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000002 RCX: ffffffff8b4e993c
RDX: ffff888029b60000 RSI: 0000000000000002 RDI: 0000000000000007
RBP: ffff88802f47081e R08: 0000000000000007 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000300 R15: 0000000000000000
xa_is_node include/linux/xarray.h:1264 [inline]
mas_start lib/maple_tree.c:1377 [inline]
mtree_load+0x37c/0xa40 lib/maple_tree.c:6281
vma_lookup include/linux/mm.h:3452 [inline]
__get_user_pages+0x10ea/0x36f0 mm/gup.c:1448
__get_user_pages_locked mm/gup.c:1821 [inline]
faultin_page_range+0x3a8/0x980 mm/gup.c:1981
madvise_populate mm/madvise.c:965 [inline]
do_madvise+0x553/0x7c0 mm/madvise.c:1695
__do_sys_madvise mm/madvise.c:1714 [inline]
__se_sys_madvise mm/madvise.c:1712 [inline]
__x64_sys_madvise+0xa9/0x110 mm/madvise.c:1712
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f185878d169
RSP: 002b:00007f1859565038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f18589a5fa0 RCX: 00007f185878d169
RDX: 0000000000000017 RSI: 0000000000c00304 RDI: 0000400000000000
RBP: 00007f185880e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f18589a5fa0 R15: 00007ffffad49be8
rcu: rcu_preempt kthread timer wakeup didn't happen for 10497 jiffies! g96589 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=72355
rcu: rcu_preempt kthread starved for 10498 jiffies! g96589 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27552 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6857
schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2024
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2226
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
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 UID: 0 PID: 20448 Comm: syz.3.3477 Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:kasan_check_range+0x10/0x1a0 mm/kasan/generic.c:188
Code: 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 85 f6 0f 84 50 01 00 00 48 89 f8 <41> 54 44 0f b6 c2 48 01 f0 55 53 0f 82 c6 00 00 00 48 b8 ff ff ff
RSP: 0000:ffffc90000a18cc0 EFLAGS: 00000002
RAX: ffffffff9aadfa00 RBX: ffffffff9aadfa00 RCX: ffffffff819721c3
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff9aadfa00
RBP: 0000000000000006 R08: 0000000000000000 R09: fffffbfff20c4b82
R10: ffffffff90625c17 R11: 0000000000000005 R12: 0000000000000002
R13: ffff888066761340 R14: 1ffff920001431a4 R15: ffffffff9aadf9f8
FS: 000055557944c500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2b0e6e CR3: 0000000081f7a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
queued_spin_is_locked include/asm-generic/qspinlock.h:57 [inline]
debug_spin_unlock kernel/locking/spinlock_debug.c:101 [inline]
do_raw_spin_unlock+0x53/0x230 kernel/locking/spinlock_debug.c:141
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:150 [inline]
_raw_spin_unlock_irqrestore+0x22/0x80 kernel/locking/spinlock.c:194
debug_object_activate+0x2e6/0x4a0 lib/debugobjects.c:836
debug_hrtimer_activate kernel/time/hrtimer.c:455 [inline]
debug_activate kernel/time/hrtimer.c:496 [inline]
enqueue_hrtimer+0x25/0x3c0 kernel/time/hrtimer.c:1100
__run_hrtimer kernel/time/hrtimer.c:1818 [inline]
__hrtimer_run_queues+0x903/0xae0 kernel/time/hrtimer.c:1865
hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1927
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_is_held_type+0x107/0x150 kernel/locking/lockdep.c:5928
Code: 00 00 b8 ff ff ff ff 65 0f c1 05 3c 55 ab 74 83 f8 01 75 2d 9c 58 f6 c4 02 75 43 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 45 31 ed eb
RSP: 0000:ffffc90005037808 EFLAGS: 00000282
RAX: 0000000000000046 RBX: ffff88805ebc2fa8 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8b6cf100 RDI: ffffffff8bd35aa0
RBP: ffffffff8e1bcc60 R08: 0000000000000000 R09: ffffed100952fc00
R10: ffff88804a97e003 R11: 0000000000000005 R12: ffff88805ebc2440
R13: 0000000000000000 R14: 00000000ffffffff R15: 0000000000000004
lock_is_held include/linux/lockdep.h:249 [inline]
schedule_debug kernel/sched/core.c:5968 [inline]
__schedule+0x1de9/0x5890 kernel/sched/core.c:6663
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6944
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
filemap_map_pages+0xe4e/0x16b0 mm/filemap.c:3823
do_fault_around mm/memory.c:5361 [inline]
do_read_fault mm/memory.c:5394 [inline]
do_fault mm/memory.c:5537 [inline]
do_pte_missing+0xdb8/0x3e10 mm/memory.c:4058
handle_pte_fault mm/memory.c:5900 [inline]
__handle_mm_fault+0x1166/0x2c60 mm/memory.c:6043
handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6212
do_user_addr_fault+0x60d/0x13f0 arch/x86/mm/fault.c:1337
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fc0f8a6d4cd
Code: ff 48 83 e8 01 48 89 ee bf 01 00 00 00 48 c1 e0 0e 48 c1 ee 06 48 01 c8 48 89 e9 81 e6 ff 3f 00 00 48 c1 e9 03 83 e1 07 d3 e7 <40> 84 bc 06 20 20 00 00 0f 85 11 fd ff ff e9 c0 fd ff ff e8 7b 32
RSP: 002b:00007ffdd41aabd0 EFLAGS: 00010246
RAX: 000000110c2ac000 RBX: 00007fc0f98d5720 RCX: 0000000000000000
RDX: 0000000000001386 RSI: 0000000000002e4e RDI: 0000000000000001
RBP: ffffffff81eb9385 R08: 00007fc0f8da6038 R09: 00007fc0f8d92000
R10: 00007fc0f81ff008 R11: 0000000000000008 R12: 0000000000000008
R13: 0000000000000000 R14: ffffffff81eb91fa R15: 000000000000158e