rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P21266/2:b..l
rcu: (detected by 0, t=10502 jiffies, g=83929, q=332 ncpus=2)
task:syz.5.3845 state:R running task stack:25904 pid:21266 tgid:21263 ppid:15910 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7078
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:__sanitizer_cov_trace_pc+0x56/0x70 kernel/kcov.c:222
Code: 00 f0 00 75 35 8b 82 1c 16 00 00 85 c0 74 2b 8b 82 f8 15 00 00 83 f8 02 75 20 48 8b 8a 00 16 00 00 8b 92 fc 15 00 00 48 8b 01 <48> 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 c3 cc cc cc cc 0f
RSP: 0018:ffffc90005527640 EFLAGS: 00000246
RAX: 000000000007ffff RBX: ffffea0001427240 RCX: ffffc9001eae9000
RDX: 0000000000080000 RSI: ffffffff81c41ad1 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000002 R12: 00000000000009ff
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000aa4ef7
PageTail include/linux/page-flags.h:281 [inline]
const_folio_flags.constprop.0+0x51/0x150 include/linux/page-flags.h:309
folio_test_locked include/linux/page-flags.h:509 [inline]
next_uptodate_folio+0xac/0x4b0 mm/filemap.c:3504
filemap_map_pages+0x1c6/0x16b0 mm/filemap.c:3646
do_fault_around mm/memory.c:5280 [inline]
do_read_fault mm/memory.c:5313 [inline]
do_fault mm/memory.c:5456 [inline]
do_pte_missing+0xdab/0x3e70 mm/memory.c:3979
handle_pte_fault mm/memory.c:5801 [inline]
__handle_mm_fault+0x103c/0x2a40 mm/memory.c:5944
handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6112
faultin_page mm/gup.c:1187 [inline]
__get_user_pages+0x8d9/0x3b50 mm/gup.c:1485
populate_vma_page_range+0x27f/0x3a0 mm/gup.c:1923
__mm_populate+0x1d6/0x380 mm/gup.c:2026
mm_populate include/linux/mm.h:3386 [inline]
vm_mmap_pgoff+0x293/0x360 mm/util.c:585
ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:542
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
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: 0033:0x7fb105d80849
RSP: 002b:00007fb106ac0058 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fb105f46080 RCX: 00007fb105d80849
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007fb105df3986 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb105f46080 R15: 00007ffed09098e8
rcu: rcu_preempt kthread timer wakeup didn't happen for 10498 jiffies! g83929 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=75531
rcu: rcu_preempt kthread starved for 10499 jiffies! g83929 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:27600 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 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 UID: 0 PID: 21260 Comm: syz.9.3843 Not tainted 6.12.0-syzkaller-10740-g509f806f7f70 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:hrtimer_get_softexpires_tv64 include/linux/hrtimer.h:149 [inline]
RIP: 0010:__hrtimer_run_queues+0x3fb/0xae0 kernel/time/hrtimer.c:1800
Code: 00 00 e8 58 cc 12 00 48 8b 9c 24 80 00 00 00 e8 4b cc 12 00 49 8d 7c 24 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ac 05 00 00 49 8b 6c 24 20 48 89 de 48 89 ef e8
RSP: 0018:ffffc90000a18e30 EFLAGS: 00000806
RAX: dffffc0000000000 RBX: 1bc16d674ee14a6f RCX: ffffffff8b20bb78
RDX: 1ffff1100b8bbc6c RSI: ffffffff817bf8f5 RDI: ffff88805c5de360
RBP: 0000000000000001 R08: 0000000000000006 R09: ffff88805c5de340
R10: ffff88805c5de340 R11: 0000000000000002 R12: ffff88805c5de340
R13: ffff8880b872cb00 R14: ffff8880b872ca00 R15: ffffffff893c4970
FS: 00007f84464e26c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020029000 CR3: 000000002a6be000 CR4: 00000000003526f0
Call Trace:
hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
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:memory_is_poisoned_n mm/kasan/generic.c:130 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x34/0x1a0 mm/kasan/generic.c:189
Code: 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 ff ff 7f ff ff 48 39 f8 0f 83 b3 00 00 00 <4c> 8d 54 37 ff 48 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 d1 48
RSP: 0018:ffffc90002e37818 EFLAGS: 00000283
RAX: ffff7fffffffffff RBX: 0000000000000001 RCX: ffffffff816a8dfc
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9060a4d0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000001 R12: 0000000000000000
R13: 000000000003d90c R14: 0000000000000000 R15: 0000000000000000
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
cpumask_test_cpu include/linux/cpumask.h:570 [inline]
cpu_online include/linux/cpumask.h:1117 [inline]
trace_lock_acquire+0x3c/0x1f0 include/trace/events/lock.h:24
lock_acquire+0x2f/0xb0 kernel/locking/lockdep.c:5820
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock_sched include/linux/rcupdate.h:941 [inline]
pfn_valid include/linux/mmzone.h:2048 [inline]
sg_phys include/linux/scatterlist.h:389 [inline]
vring_map_one_sg+0x42f/0x870 drivers/virtio/virtio_ring.c:382
virtqueue_add_split drivers/virtio/virtio_ring.c:621 [inline]
virtqueue_add drivers/virtio/virtio_ring.c:2282 [inline]
virtqueue_add_inbuf+0x540/0x1520 drivers/virtio/virtio_ring.c:2384
request_entropy drivers/char/hw_random/virtio-rng.c:61 [inline]
copy_data+0x267/0x300 drivers/char/hw_random/virtio-rng.c:74
virtio_read+0x1f6/0x240 drivers/char/hw_random/virtio-rng.c:92
rng_get_data drivers/char/hw_random/core.c:187 [inline]
rng_dev_read+0x447/0x800 drivers/char/hw_random/core.c:230
do_loop_readv_writev fs/read_write.c:840 [inline]
do_loop_readv_writev fs/read_write.c:828 [inline]
vfs_readv+0x6bf/0x890 fs/read_write.c:1013
do_preadv+0x1b1/0x270 fs/read_write.c:1125
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: 0033:0x7f8445780849
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f84464e2058 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007f8445945fa0 RCX: 00007f8445780849
RDX: 0000000000000002 RSI: 0000000020000580 RDI: 0000000000000003
RBP: 00007f84457f3986 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8445945fa0 R15: 00007ffd4df2ca78