rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7665/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=16377, q=175 ncpus=2)
task:syz.0.602 state:R running task stack:26416 pid:7665 tgid:7664 ppid:5828 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x1142/0x5b60 kernel/sched/core.c:6764
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7086
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.part.0+0x155/0x380 kernel/locking/lockdep.c:5816
Code: b8 ff ff ff ff 65 0f c1 05 70 ca 6b 7e 83 f8 01 0f 85 d0 01 00 00 9c 58 f6 c4 02 0f 85 e5 01 00 00 48 85 ed 0f 85 b6 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7
RSP: 0018:ffffc9001c1c6e58 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 1ffff92003838dcc RCX: 000000009f2502c7
RDX: 0000000000000001 RSI: ffffffff8b6cdb40 RDI: ffffffff8bd2e7c0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff2dd6f98
R10: ffffffff96eb7cc7 R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff8e1be140 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
page_ext_get+0x3a/0x310 mm/page_ext.c:525
__set_page_owner+0x96/0x560 mm/page_owner.c:322
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558
prep_new_page mm/page_alloc.c:1566 [inline]
get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476
__alloc_pages_noprof+0x221/0x2470 mm/page_alloc.c:4753
alloc_pages_mpol_noprof+0x2c8/0x620 mm/mempolicy.c:2269
folio_alloc_mpol_noprof+0x36/0xd0 mm/mempolicy.c:2288
shmem_alloc_folio+0x135/0x160 mm/shmem.c:1799
shmem_alloc_and_add_folio+0x48b/0xc00 mm/shmem.c:1838
shmem_get_folio_gfp+0x689/0x1530 mm/shmem.c:2358
shmem_fault+0x200/0xae0 mm/shmem.c:2559
__do_fault+0x10a/0x490 mm/memory.c:4908
do_read_fault mm/memory.c:5323 [inline]
do_fault mm/memory.c:5457 [inline]
do_pte_missing+0xebd/0x3e00 mm/memory.c:3980
handle_pte_fault mm/memory.c:5820 [inline]
__handle_mm_fault+0x1166/0x2c60 mm/memory.c:5963
handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6131
faultin_page mm/gup.c:1196 [inline]
__get_user_pages+0x8d9/0x3b50 mm/gup.c:1494
populate_vma_page_range+0x27f/0x3a0 mm/gup.c:1932
__mm_populate+0x1d6/0x380 mm/gup.c:2035
mm_populate include/linux/mm.h:3397 [inline]
vm_mmap_pgoff+0x2d3/0x3a0 mm/util.c:580
ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:546
__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: 0033:0x7f88d878cd29
RSP: 002b:00007f88d96bb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f88d89a5fa0 RCX: 00007f88d878cd29
RDX: 000000000000000f RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f88d880e2a0 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000004008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f88d89a5fa0 R15: 00007ffc12fc4ee8
rcu: rcu_preempt kthread starved for 10502 jiffies! g16377 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:26992 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x1142/0x5b60 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6856
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: 7669 Comm: syz.2.604 Not tainted 6.13.0-syzkaller-06167-g0afd22092df4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:advance_sched+0x1be/0xc60 net/sched/sch_taprio.c:941
Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 26 0a 00 00 49 8b 46 f8 4d 85 ff 48 89 44 24 18 0f 84 33 08 00 00 e8 d2 c2 50 f8 <48> 8b 1c 24 48 85 db 0f 84 c4 07 00 00 e8 c0 c2 50 f8 48 8d bb 50
RSP: 0018:ffffc90000a18d80 EFLAGS: 00000046
RAX: 0000000080010002 RBX: 0000000000000001 RCX: ffffffff89690a32
RDX: ffff88802e518000 RSI: ffffffff896904de RDI: 0000000000000005
RBP: 000000000003d8cc R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000005 R12: ffff88802f461340
R13: ffff8880b872c780 R14: ffff88802f461340 R15: ffff888059384400
FS: 00007fac075526c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c372f5f CR3: 0000000029a56000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__run_hrtimer kernel/time/hrtimer.c:1738 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1802
hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1864
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:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:123 [inline]
RIP: 0010:lock_is_held_type+0x54/0x150 kernel/locking/lockdep.c:5919
Code: 38 ad 74 85 c0 0f 85 ce 00 00 00 65 4c 8b 25 13 85 ae 74 41 8b 94 24 dc 0a 00 00 85 d2 0f 85 b6 00 00 00 48 89 fd 41 89 f6 9c <8f> 04 24 fa 48 c7 c7 00 db 6c 8b 45 31 ff e8 09 17 00 00 4d 8d ac
RSP: 0018:ffffc9001bc9f5c8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc9001bc9f7a8 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff88807ada5220
RBP: ffff88807ada5220 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000005 R12: ffff88802e518000
R13: 00000000ffffffff R14: 00000000ffffffff R15: dffffc0000000000
lock_is_held include/linux/lockdep.h:249 [inline]
xa_entry include/linux/xarray.h:1220 [inline]
xas_next_entry+0x29d/0x3c0 include/linux/xarray.h:1712
next_uptodate_folio+0x29/0x4a0 mm/filemap.c:3571
filemap_map_pages+0x648/0x16b0 mm/filemap.c:3764
do_fault_around mm/memory.c:5281 [inline]
do_read_fault mm/memory.c:5314 [inline]
do_fault mm/memory.c:5457 [inline]
do_pte_missing+0xda6/0x3e00 mm/memory.c:3980
handle_pte_fault mm/memory.c:5820 [inline]
__handle_mm_fault+0x1166/0x2c60 mm/memory.c:5963
handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6131
faultin_page mm/gup.c:1196 [inline]
__get_user_pages+0x8d9/0x3b50 mm/gup.c:1494
populate_vma_page_range+0x27f/0x3a0 mm/gup.c:1932
__mm_populate+0x1d6/0x380 mm/gup.c:2035
mm_populate include/linux/mm.h:3397 [inline]
vm_mmap_pgoff+0x2d3/0x3a0 mm/util.c:580
ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:546
__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: 0033:0x7fac0678cd29
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:00007fac07552038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fac069a5fa0 RCX: 00007fac0678cd29
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007fac0680e2a0 R08: ffffffffffffffff R09: 0000000002000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fac069a5fa0 R15: 00007ffd1b4a9e78