rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P19847/1:b..l P14809/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=99913, q=1999 ncpus=2)
task:kworker/0:14 state:R running task stack:22856 pid:14809 tgid:14809 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7256
irqentry_exit+0x36/0x90 kernel/entry/common.c:211
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5872
Code: 74 08 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 12 0b e9 0e 0f 82 74 02 00 00 8b 35 8a 3b e9 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 29 74 08 12 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc9001040f158 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e3c4460 RCX: 00000000a51bfe70
RDX: 0000000000000000 RSI: ffffffff8da048cb RDI: ffffffff8bf06e40
RBP: 0000000000000002 R08: 17520054606c6eb3 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:867 [inline]
class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x160/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x84/0x1a0 mm/page_owner.c:311
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
discard_slab mm/slub.c:3326 [inline]
__put_partials+0x130/0x170 mm/slub.c:3872
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:408
kasan_kmalloc include/linux/kasan.h:262 [inline]
__do_kmalloc_node mm/slub.c:5642 [inline]
__kmalloc_noprof+0x32f/0x880 mm/slub.c:5654
kmalloc_noprof include/linux/slab.h:961 [inline]
usb_alloc_urb+0x66/0xa0 drivers/usb/core/urb.c:75
usb_internal_control_msg drivers/usb/core/message.c:96 [inline]
usb_control_msg+0x1d3/0x4a0 drivers/usb/core/message.c:154
get_port_status drivers/usb/core/hub.c:611 [inline]
hub_ext_port_status+0x14e/0x670 drivers/usb/core/hub.c:628
usb_hub_port_status drivers/usb/core/hub.c:678 [inline]
hub_port_wait_reset drivers/usb/core/hub.c:2973 [inline]
hub_port_reset+0xad2/0x1cb0 drivers/usb/core/hub.c:3092
hub_port_init+0x716/0x3a70 drivers/usb/core/hub.c:5055
hub_port_connect drivers/usb/core/hub.c:5495 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
port_event drivers/usb/core/hub.c:5870 [inline]
hub_event+0x2ce1/0x4fe0 drivers/usb/core/hub.c:5952
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz.3.3345 state:R running task stack:26712 pid:19847 tgid:19847 ppid:18635 task_flags:0x400040 flags:0x00080001
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7256
irqentry_exit+0x36/0x90 kernel/entry/common.c:211
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5872
Code: 74 08 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 12 0b e9 0e 0f 82 74 02 00 00 8b 35 8a 3b e9 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 29 74 08 12 0f 85 c7 02 00 00 48 83 c4
RSP: 0000:ffffc9000dd2f428 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e3c4460 RCX: 00000000d57e4532
RDX: 0000000000000000 RSI: ffffffff8da048cb RDI: ffffffff8bf06e40
RBP: 0000000000000002 R08: 847be07d99abf213 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:867 [inline]
class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x160/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x84/0x1a0 mm/page_owner.c:311
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
discard_slab mm/slub.c:3326 [inline]
__put_partials+0x130/0x170 mm/slub.c:3872
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:352
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4970 [inline]
slab_alloc_node mm/slub.c:5280 [inline]
kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5287
new_handle fs/jbd2/transaction.c:457 [inline]
jbd2__journal_start+0x193/0x6a0 fs/jbd2/transaction.c:484
__ext4_journal_start_sb+0x195/0x690 fs/ext4/ext4_jbd2.c:115
__ext4_journal_start fs/ext4/ext4_jbd2.h:242 [inline]
ext4_dirty_inode+0xa1/0x130 fs/ext4/inode.c:6514
__mark_inode_dirty+0x1ee/0xe40 fs/fs-writeback.c:2566
generic_update_time+0xcf/0xf0 fs/inode.c:2105
inode_update_time fs/inode.c:2118 [inline]
__file_update_time fs/inode.c:2345 [inline]
file_update_time+0x17d/0x1c0 fs/inode.c:2375
ext4_page_mkwrite+0x33d/0x1880 fs/ext4/inode.c:6683
do_page_mkwrite+0x174/0x380 mm/memory.c:3488
do_shared_fault mm/memory.c:5774 [inline]
do_fault mm/memory.c:5836 [inline]
do_pte_missing+0x29d/0x3ba0 mm/memory.c:4361
handle_pte_fault mm/memory.c:6177 [inline]
__handle_mm_fault+0x1556/0x2aa0 mm/memory.c:6318
handle_mm_fault+0x589/0xd10 mm/memory.c:6487
do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7fa5f826f01a
RSP: 002b:00007fff102dbd90 EFLAGS: 00010202
RAX: 0000001b31223000 RBX: 00007fa5f9115720 RCX: 0000001b31222ff8
RDX: 0000001b30e24220 RSI: 0000000000000008 RDI: 00007fa5f9115720
RBP: ffffffff8973b64b R08: 00007fa5f85e6128 R09: 00007fa5f85d2000
R10: 00007fa5f79fd008 R11: 0000000000000005 R12: 0000000000000005
R13: 00000000000001f3 R14: ffffffff8973bf33 R15: 000000000000025d
kworker/u8:26: page allocation failure: order:0, mode:0x40820(GFP_ATOMIC|__GFP_COMP), nodemask=(null),cpuset=/,mems_allowed=0-1
CPU: 0 UID: 0 PID: 13695 Comm: kworker/u8:26 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
warn_alloc+0x248/0x3a0 mm/page_alloc.c:3967
__alloc_pages_slowpath mm/page_alloc.c:4923 [inline]
__alloc_frozen_pages_noprof+0xe9b/0x2470 mm/page_alloc.c:5196
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
alloc_slab_page mm/slub.c:3055 [inline]
allocate_slab mm/slub.c:3236 [inline]
new_slab+0x268/0x360 mm/slub.c:3282
___slab_alloc+0xdae/0x1a60 mm/slub.c:4651
__slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4770
__slab_alloc_node mm/slub.c:4846 [inline]
slab_alloc_node mm/slub.c:5268 [inline]
kmem_cache_alloc_noprof+0x43f/0x6e0 mm/slub.c:5287
skb_ext_maybe_cow net/core/skbuff.c:7000 [inline]
skb_ext_add+0xf8/0x7b0 net/core/skbuff.c:7075
nf_bridge_unshare net/bridge/br_netfilter_hooks.c:169 [inline]
br_nf_forward_ip.part.0+0x28/0x810 net/bridge/br_netfilter_hooks.c:681
br_nf_forward_ip net/bridge/br_netfilter_hooks.c:676 [inline]
br_nf_forward+0xf0f/0x1be0 net/bridge/br_netfilter_hooks.c:773
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xbe/0x200 net/netfilter/core.c:623
nf_hook+0x45e/0x780 include/linux/netfilter.h:273
NF_HOOK include/linux/netfilter.h:316 [inline]
__br_forward+0x1be/0x5b0 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver+0xf1/0x180 net/bridge/br_forward.c:191
br_flood+0x17c/0x650 net/bridge/br_forward.c:238
br_handle_frame_finish+0x10e6/0x1ec0 net/bridge/br_input.c:229
br_nf_hook_thresh+0x307/0x410 net/bridge/br_netfilter_hooks.c:1167
br_nf_pre_routing_finish_ipv6+0x76a/0xfc0 net/bridge/br_netfilter_ipv6.c:154
NF_HOOK include/linux/netfilter.h:318 [inline]
br_nf_pre_routing_ipv6+0x3cd/0x8c0 net/bridge/br_netfilter_ipv6.c:184
br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:508
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0xad8/0x14b0 net/bridge/br_input.c:442
__netif_receive_skb_core.constprop.0+0xa25/0x4bd0 net/core/dev.c:5966
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6077
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6192
process_backlog+0x439/0x15e0 net/core/dev.c:6544
__napi_poll.constprop.0+0xba/0x550 net/core/dev.c:7594
napi_poll net/core/dev.c:7657 [inline]
net_rx_action+0x97f/0xef0 net/core/dev.c:7784
handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
do_softirq kernel/softirq.c:523 [inline]
do_softirq+0xb2/0xf0 kernel/softirq.c:510
__local_bh_enable_ip+0x100/0x120 kernel/softirq.c:450
local_bh_enable include/linux/bottom_half.h:33 [inline]
fpregs_unlock arch/x86/include/asm/fpu/api.h:77 [inline]
kernel_fpu_end+0x5e/0x70 arch/x86/kernel/fpu/core.c:479
blake2s_compress+0x7b/0xe0 lib/crypto/x86/blake2s.h:44
blake2s_final+0xc9/0x150 lib/crypto/blake2s.c:148
blake2s.constprop.0+0xbc/0x100 include/crypto/blake2s.h:101
compute_mac1 drivers/net/wireguard/cookie.c:80 [inline]
wg_cookie_add_mac_to_packet+0x52/0x1c0 drivers/net/wireguard/cookie.c:163
wg_packet_send_handshake_initiation+0x1c4/0x360 drivers/net/wireguard/send.c:35
wg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Mem-Info:
active_anon:37499 inactive_anon:0 isolated_anon:0
active_file:20906 inactive_file:41547 isolated_file:0
unevictable:768 dirty:11 writeback:0
slab_reclaimable:10920 slab_unreclaimable:1339342
mapped:39810 shmem:32290 pagetables:1095
sec_pagetables:0 bounce:0
kernel_misc_reclaimable:0
free:10834 free_pcp:10993 free_cma:0
Node 0 active_anon:149996kB inactive_anon:0kB active_file:83536kB inactive_file:165848kB unevictable:1536kB isolated(anon):0kB isolated(file):0kB mapped:159072kB dirty:44kB writeback:0kB shmem:127624kB shmem_thp:0kB shmem_pmdmapped:0kB anon_thp:0kB kernel_stack:12920kB pagetables:4252kB sec_pagetables:0kB all_unreclaimable? no Balloon:0kB
Node 1 active_anon:0kB inactive_anon:0kB active_file:88kB inactive_file:340kB unevictable:1536kB isolated(anon):0kB isolated(file):0kB mapped:168kB dirty:0kB writeback:0kB shmem:1536kB shmem_thp:0kB shmem_pmdmapped:0kB anon_thp:0kB kernel_stack:48kB pagetables:128kB sec_pagetables:0kB all_unreclaimable? no Balloon:0kB
Node 0
DMA free:10012kB boost:0kB min:208kB low:260kB high:312kB reserved_highatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB zspages:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:28kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0
2485
2487
2487
2487
Node 0 DMA32 free:12544kB boost:76732kB min:110840kB low:119364kB high:127888kB reserved_highatomic:0KB free_highatomic:0KB active_anon:149996kB inactive_anon:0kB active_file:83536kB inactive_file:165848kB unevictable:1536kB writepending:8kB zspages:0kB present:3129332kB managed:2544884kB mlocked:0kB bounce:0kB free_pcp:11980kB local_pcp:8896kB free_cma:0kB
lowmem_reserve[]: 0
0 1
1 1
Node 0
Normal free:0kB boost:0kB min:24kB low:28kB high:32kB reserved_highatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB zspages:0kB present:1048580kB managed:1900kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0
0
0 0
0
Node 1
Normal free:20780kB boost:0kB min:55768kB low:69708kB high:83648kB reserved_highatomic:2048KB free_highatomic:16KB active_anon:0kB inactive_anon:0kB active_file:88kB inactive_file:340kB unevictable:1536kB writepending:0kB zspages:0kB present:4194300kB managed:4111100kB mlocked:0kB bounce:0kB free_pcp:31964kB local_pcp:18584kB free_cma:0kB
lowmem_reserve[]: 0 0
0 0
0
Node 0 DMA:
0*4kB
1*8kB (U) 0*16kB 0*32kB 0*64kB 0*128kB 1*256kB (U) 1*512kB (U) 1*1024kB (U) 2*2048kB (UM)
1*4096kB (M) = 9992kB
Node 0 DMA32: 0*4kB
0*8kB 1*16kB (M) 0*32kB 1*64kB (M) 1*128kB (M)
24*256kB (M) 12*512kB (ME)
0*1024kB
0*2048kB 0*4096kB = 12496kB
Node 0
Normal: 0*4kB 0*8kB 0*16kB 0*32kB
0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB
Node 1 Normal: 2*4kB (UM) 4*8kB (UE) 14*16kB (UEH) 6*32kB (ME) 3*64kB (UE) 3*128kB (UE) 1*256kB (M) 2*512kB (UM) 2*1024kB (UE) 2*2048kB (ME) 3*4096kB (M) = 20744kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 0 hugepages_total=3 hugepages_free=2 hugepages_surp=0 hugepages_size=2048kB
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 1 hugepages_total=1 hugepages_free=1 hugepages_surp=0 hugepages_size=2048kB
94740 total pagecache pages
0 pages in swap cache
Free swap = 124996kB
Total swap = 124996kB
2097051 pages RAM
0 pages HighMem/MovableOnly
428740 pages reserved
0 pages cma reserved
SLUB: Unable to allocate memory on CPU 0 (of node 0) on node -1, gfp=0x820(GFP_ATOMIC)
cache: skbuff_ext_cache, object size: 192, buffer size: 256, default order: 0, min order: 0
node 0: slabs: 34158, objs: 546528, free: 0
node 1: slabs: 115716, objs: 1851456, free: 0