rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5845/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=42889, q=1303 ncpus=2)
task:syz-executor state:R running task stack:20576 pid:5845 tgid:5845 ppid:5840 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x184f/0x4c30 kernel/sched/core.c:6693
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7015
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5829
Code: 2b 00 74 08 4c 89 f7 e8 ea 6c 8e 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90003e47480 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920007c8e9c RCX: 1a92dfd636ab7400
RDX: dffffc0000000000 RSI: ffffffff8c0adc40 RDI: ffffffff8c610ce0
RBP: ffffc90003e475c8 R08: ffffffff942d0807 R09: 1ffffffff285a100
R10: dffffc0000000000 R11: fffffbfff285a101 R12: 1ffff920007c8e98
R13: dffffc0000000000 R14: ffffc90003e474e0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
page_ext_get+0x3d/0x2a0 mm/page_ext.c:525
__reset_page_owner+0x30/0x430 mm/page_owner.c:290
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0xdf9/0x1140 mm/page_alloc.c:2657
discard_slab mm/slub.c:2677 [inline]
__put_partials+0xeb/0x130 mm/slub.c:3145
put_cpu_partial+0x17c/0x250 mm/slub.c:3220
__slab_free+0x2ea/0x3d0 mm/slub.c:4449
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:247 [inline]
slab_post_alloc_hook mm/slub.c:4085 [inline]
slab_alloc_node mm/slub.c:4134 [inline]
__do_kmalloc_node mm/slub.c:4263 [inline]
__kmalloc_node_noprof+0x1d2/0x440 mm/slub.c:4270
__kvmalloc_node_noprof+0x72/0x190 mm/util.c:658
alloc_fdtable+0x14a/0x280 fs/file.c:137
dup_fd+0x9a3/0xcf0 fs/file.c:341
copy_files+0xc8/0x120 kernel/fork.c:1778
copy_process+0x16e6/0x3d50 kernel/fork.c:2362
kernel_clone+0x226/0x8f0 kernel/fork.c:2786
__do_sys_clone kernel/fork.c:2929 [inline]
__se_sys_clone kernel/fork.c:2913 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2913
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: 0033:0x7f974ad75093
RSP: 002b:00007ffd4f83f518 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f974ad75093
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055556dfdd7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000004058c R14: 0000000000040233 R15: 00007ffd4f83f6a0
rcu: rcu_preempt kthread starved for 2159 jiffies! g42889 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:25824 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x184f/0x4c30 kernel/sched/core.c:6693
__schedule_loop kernel/sched/core.c:6770 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6785
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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: 24 Comm: ksoftirqd/1 Not tainted 6.12.0-rc7-syzkaller-00144-g66418447d27b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:unwind_next_frame+0x334/0x22d0 arch/x86/kernel/unwind_orc.c:505
Code: 00 00 00 00 fc ff df 0f b6 04 28 84 c0 0f 85 58 18 00 00 4c 89 f0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 6a 18 00 00 0f b6 43 01 <83> e0 07 0f 84 ca 15 00 00 83 f8 01 4c 8b 6c 24 08 49 bc 00 00 00
RSP: 0018:ffffc900001e5b30 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffffff90aecdc4 RCX: ffffffff90357a68
RDX: ffffffff90aecdc0 RSI: ffffffff90aecdc0 RDI: 0000000000000001
RBP: dffffc0000000000 R08: 0000000000000009 R09: ffffc900001e5cf0
R10: ffffc900001e5c50 R11: ffffffff8180a270 R12: 0000000000000000
R13: ffffc900001e5c00 R14: ffffffff90aecdc5 R15: ffffffff81f2d411
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f82a110ac78 CR3: 00000000799be000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:2342 [inline]
slab_free mm/slub.c:4579 [inline]
kmem_cache_free+0x1a2/0x420 mm/slub.c:4681
skb_ext_reset include/linux/skbuff.h:4860 [inline]
skb_scrub_packet+0x304/0x440 net/core/skbuff.c:6118
____dev_forward_skb include/linux/netdevice.h:4027 [inline]
__dev_forward_skb2+0x273/0x720 net/core/dev.c:2187
veth_forward_skb drivers/net/veth.c:320 [inline]
veth_xmit+0x456/0xae0 drivers/net/veth.c:375
__netdev_start_xmit include/linux/netdevice.h:4928 [inline]
netdev_start_xmit include/linux/netdevice.h:4937 [inline]
xmit_one net/core/dev.c:3588 [inline]
dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3604
__dev_queue_xmit+0x1b11/0x3ed0 net/core/dev.c:4432
dev_queue_xmit include/linux/netdevice.h:3094 [inline]
br_dev_queue_push_xmit+0x703/0x8d0 net/bridge/br_forward.c:53
NF_HOOK+0x700/0x7c0 include/linux/netfilter.h:314
br_nf_post_routing+0xa20/0xe80 net/bridge/br_netfilter_hooks.c:994
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
NF_HOOK+0x2a7/0x460 include/linux/netfilter.h:312
br_forward_finish+0xd8/0x130 net/bridge/br_forward.c:66
br_nf_forward_finish+0xb49/0xfb0 net/bridge/br_netfilter_hooks.c:690
NF_HOOK+0x700/0x7c0 include/linux/netfilter.h:314
br_nf_forward_ip+0x61e/0x7b0 net/bridge/br_netfilter_hooks.c:744
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
NF_HOOK+0x2a7/0x460 include/linux/netfilter.h:312
__br_forward+0x489/0x660 net/bridge/br_forward.c:115
br_handle_frame_finish+0x18ba/0x1fe0 net/bridge/br_input.c:215
br_nf_hook_thresh+0x472/0x590
br_nf_pre_routing_finish_ipv6+0xaa0/0xdd0
NF_HOOK include/linux/netfilter.h:314 [inline]
br_nf_pre_routing_ipv6+0x379/0x770 net/bridge/br_netfilter_ipv6.c:184
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x9fd/0x1530 net/bridge/br_input.c:424
__netif_receive_skb_core+0x13e8/0x4570 net/core/dev.c:5564
__netif_receive_skb_one_core net/core/dev.c:5668 [inline]
__netif_receive_skb+0x12f/0x650 net/core/dev.c:5783
process_backlog+0x662/0x15b0 net/core/dev.c:6115
__napi_poll+0xcb/0x490 net/core/dev.c:6779
napi_poll net/core/dev.c:6848 [inline]
net_rx_action+0x89b/0x1240 net/core/dev.c:6970
handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
run_ksoftirqd+0xca/0x130 kernel/softirq.c:927
smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
net_ratelimit: 12578 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
net_ratelimit: 13650 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:20:10:00:ff:ff, vlan:0)