rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10472/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=61241, q=703 ncpus=2)
task:syz-executor.1 state:R running task stack:25712 pid:10472 tgid:10471 ppid:10137 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
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:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5722
Code: c1 05 9a af 96 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000355f058 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920006abe0d RCX: 00000000938a2bd4
RDX: 0000000000000001 RSI: ffffffff8b2cb260 RDI: ffffffff8b9001c0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff284d858
R10: ffffffff9426c2c7 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8dbb1920 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock include/linux/rcupdate.h:781 [inline]
page_ext_get+0x3a/0x310 mm/page_ext.c:521
__page_table_check_zero+0xc4/0x360 mm/page_table_check.c:142
page_table_check_alloc include/linux/page_table_check.h:33 [inline]
post_alloc_hook+0x2c0/0x350 mm/page_alloc.c:1469
prep_new_page mm/page_alloc.c:1476 [inline]
get_page_from_freelist+0x136a/0x2df0 mm/page_alloc.c:3402
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4660
alloc_pages_mpol_noprof+0x275/0x610 mm/mempolicy.c:2265
shmem_alloc_folio+0x114/0x150 mm/shmem.c:1628
shmem_alloc_and_add_folio+0x14f/0x790 mm/shmem.c:1668
shmem_get_folio_gfp+0x687/0x13d0 mm/shmem.c:2055
shmem_fault+0x205/0xaf0 mm/shmem.c:2255
__do_fault+0x10a/0x490 mm/memory.c:4562
do_read_fault mm/memory.c:4926 [inline]
do_fault mm/memory.c:5056 [inline]
do_pte_missing mm/memory.c:3903 [inline]
handle_pte_fault mm/memory.c:5380 [inline]
__handle_mm_fault+0x39e2/0x53f0 mm/memory.c:5523
handle_mm_fault+0x476/0xa00 mm/memory.c:5688
faultin_page mm/gup.c:1290 [inline]
__get_user_pages+0x473/0x1490 mm/gup.c:1589
populate_vma_page_range+0x27f/0x3a0 mm/gup.c:2029
__mm_populate+0x1d6/0x380 mm/gup.c:2132
mm_populate include/linux/mm.h:3464 [inline]
vm_mmap_pgoff+0x293/0x360 mm/util.c:578
ksys_mmap_pgoff+0x7d/0x5d0 mm/mmap.c:1443
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:79 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:79
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: 0033:0x7f60e4e7cf69
RSP: 002b:00007f60e5be70c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f60e4fb3f80 RCX: 00007f60e4e7cf69
RDX: 0000000001000004 RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f60e4eda6fe R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000004008031 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f60e4fb3f80 R15: 00007ffdf1d67bd8
rcu: rcu_preempt kthread starved for 10545 jiffies! g61241 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:27680 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2000
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
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:
CPU: 0 PID: 10479 Comm: syz-executor.3 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:debug_lockdep_rcu_enabled+0x26/0x40 kernel/rcu/update.c:320
Code: 90 90 90 90 f3 0f 1e fa 8b 05 a2 7e fc 04 85 c0 74 20 8b 05 84 b0 fc 04 85 c0 74 16 65 48 8b 05 20 ee 1b 75 8b 80 dc 0a 00 00 <85> c0 0f 94 c0 0f b6 c0 c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00
RSP: 0018:ffffc900036afa60 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 1ffff920006d5f4f RCX: ffffc90015002000
RDX: 0000000000000000 RSI: 00000000000000a5 RDI: ffffffff8b269820
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8b269820
R13: 00000000000000a5 R14: 0000000008000000 R15: ffff88805cde5580
FS: 00007f44d109a6c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44d03b0000 CR3: 0000000027abc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__might_resched+0x5d/0x5e0 kernel/sched/core.c:10158
__might_fault+0x83/0x190 mm/memory.c:6230
__clear_user arch/x86/include/asm/uaccess_64.h:165 [inline]
copy_fpstate_to_sigframe+0x156/0xaa0 arch/x86/kernel/fpu/signal.c:216
get_sigframe+0x455/0x930 arch/x86/kernel/signal.c:142
x64_setup_rt_frame+0x129/0xce0 arch/x86/kernel/signal_64.c:175
setup_rt_frame arch/x86/kernel/signal.c:223 [inline]
handle_signal arch/x86/kernel/signal.c:267 [inline]
arch_do_signal_or_restart+0x5e6/0x7e0 arch/x86/kernel/signal.c:312
exit_to_user_mode_loop kernel/entry/common.c:111 [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+0x14a/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f44d027cf67
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:00007f44d109a178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f44d03b3f88 RCX: 00007f44d027cf69
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f44d03b3f88
RBP: 00007f44d03b3f80 R08: 00007f44d109a6c0 R09: 00007f44d109a6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f44d03b3f8c
R13: 000000000000000b R14: 00007ffc96817490 R15: 00007ffc96817578
sched: RT throttling activated