rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10858/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=32721, q=88 ncpus=2)
task:syz.0.1513 state:R running task stack:25616 pid:10858 tgid:10858 ppid:5840 task_flags:0x40004c flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6764
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6943
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6967
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]
zap_pte_range mm/memory.c:1761 [inline]
zap_pmd_range mm/memory.c:1823 [inline]
zap_pud_range mm/memory.c:1852 [inline]
zap_p4d_range mm/memory.c:1873 [inline]
unmap_page_range+0x3d52/0x48d0 mm/memory.c:1894
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1984
exit_mmap+0x283/0xd40 mm/mmap.c:1284
__mmput+0x115/0x420 kernel/fork.c:1356
exit_mm+0x220/0x310 kernel/exit.c:570
do_exit+0x9ad/0x28e0 kernel/exit.c:925
do_group_exit+0x207/0x2c0 kernel/exit.c:1087
__do_sys_exit_group kernel/exit.c:1098 [inline]
__se_sys_exit_group kernel/exit.c:1096 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6197f8cde9
RSP: 002b:00007fffcc0d2c18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6197f8cde9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fffcc0d2c7c R08: 00000013cc0d2d0f R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000011f
R13: 00000000000927c0 R14: 000000000006781a R15: 00007fffcc0d2cd0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10500 jiffies! g32721 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=34187
rcu: rcu_preempt kthread starved for 10501 jiffies! g32721 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:22680 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
kthread+0x7ab/0x920 kernel/kthread.c:464
ret_from_fork+0x4d/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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10856 Comm: syz.4.1511 Not tainted 6.14.0-rc2-syzkaller-00039-g09fbf3d50205 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__lock_acquire+0x32a/0x2100 kernel/locking/lockdep.c:5161
Code: 0f b6 04 30 84 c0 0f 85 ca 14 00 00 4c 8b a4 24 d0 00 00 00 b8 00 e0 ff ff 23 03 41 81 e6 ff 1f 00 00 44 09 f0 48 89 5c 24 10 <89> 03 4a 8d 5c ef 08 48 89 d8 48 c1 e8 03 80 3c 30 00 74 17 48 89
RSP: 0018:ffffc90000007a10 EFLAGS: 00000002
RAX: 00000000000c4ab6 RBX: ffff888033cea960 RCX: ffffffff9a402903
RDX: 0000000000000002 RSI: dffffc0000000000 RDI: ffff888033cea8f0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff2036c0f R12: ffffffff89f726eb
R13: 000000000000000a R14: 0000000000000ab6 R15: ffff888031683300
FS: 00007f7cb8f056c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c263411 CR3: 0000000022f9c000 CR4: 0000000000350ef0
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
advance_sched+0xab/0xca0 net/sched/sch_taprio.c:924
__run_hrtimer kernel/time/hrtimer.c:1801 [inline]
__hrtimer_run_queues+0x59d/0xd30 kernel/time/hrtimer.c:1865
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline]
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x6dc/0x22d0 arch/x86/kernel/unwind_orc.c:494
Code: c1 e8 3f 48 01 c8 48 83 e0 fe 49 8d 1c 46 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 48 63 03 <48> 01 d8 48 8d 4b 04 4c 39 f8 4c 0f 46 f1 48 8d 43 fc 48 0f 47 e8
RSP: 0018:ffffc90003ffe2f0 EFLAGS: 00000246
RAX: fffffffff976b5f8 RBX: ffffffff90873700 RCX: dffffc0000000000
RDX: 00000000000af9bf RSI: ffffffff912ab0e0 RDI: ffffffff816ba3f0
RBP: ffffffff90873700 R08: 0000000000000001 R09: ffffc90003ffe4b0
R10: dffffc0000000000 R11: ffffffff81ab0e90 R12: ffffffff90873700
R13: ffffffff90873700 R14: ffffffff90873700 R15: ffffffff89fdeed4
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
__kernfs_new_node+0xd8/0x870 fs/kernfs/dir.c:624
kernfs_new_node+0x137/0x240 fs/kernfs/dir.c:700
__kernfs_create_file+0x49/0x2e0 fs/kernfs/file.c:1034
sysfs_add_file_mode_ns+0x24a/0x310 fs/sysfs/file.c:313
create_files fs/sysfs/group.c:76 [inline]
internal_create_group+0x782/0x12d0 fs/sysfs/group.c:183
internal_create_groups fs/sysfs/group.c:223 [inline]
sysfs_create_groups+0x56/0x120 fs/sysfs/group.c:249
device_add_groups drivers/base/core.c:2812 [inline]
device_add_attrs+0xe5/0x600 drivers/base/core.c:2876
device_add+0x576/0xbf0 drivers/base/core.c:3619
netdev_register_kobject+0x157/0x2e0 net/core/net-sysfs.c:2170
register_netdevice+0x12c3/0x1b10 net/core/dev.c:10861
register_vlan_dev+0x38c/0x810 net/8021q/vlan.c:179
vlan_newlink+0x476/0x5c0 net/8021q/vlan_netlink.c:191
rtnl_newlink_create+0x2f0/0xa40 net/core/rtnetlink.c:3795
__rtnl_newlink net/core/rtnetlink.c:3906 [inline]
rtnl_newlink+0x1c7e/0x2210 net/core/rtnetlink.c:4021
rtnetlink_rcv_msg+0x793/0xcf0 net/core/rtnetlink.c:6911
netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2543
netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
netlink_unicast+0x7f8/0x990 net/netlink/af_netlink.c:1348
netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg+0x223/0x270 net/socket.c:733
____sys_sendmsg+0x52a/0x7e0 net/socket.c:2573
___sys_sendmsg net/socket.c:2627 [inline]
__sys_sendmsg+0x269/0x350 net/socket.c:2659
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7cb818cde9
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:00007f7cb8f05038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7cb83a5fa0 RCX: 00007f7cb818cde9
RDX: 0000000000004020 RSI: 0000400000000140 RDI: 0000000000000009
RBP: 00007f7cb820e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7cb83a5fa0 R15: 00007ffdc8b21428