bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P16496/1:b..l..
rcu: (detected by 0, t=10503 jiffies, g=72805, q=3075 ncpus=2)
task:syz.1.2518 state:R running task stack:25624 pid:16496 tgid:16495 ppid:5626 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_release+0x7f/0x3c0 kernel/locking/lockdep.c:5956
Code: 86 98 d8 0f 00 0f 84 26 02 00 00 65 8b 05 51 ec f7 12 85 c0 0f 85 17 02 00 00 65 4c 8b 3d 91 a4 f7 12 41 83 bf a4 0b 00 00 00 <0f> 85 01 02 00 00 49 81 3e a0 04 5d 95 0f 84 f4 01 00 00 9c 5b fa
RSP: 0018:ffffc9000d877100 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 8000000000000001
RDX: ffffc90004481000 RSI: ffffffff8c6e1760 RDI: ffffffff8c6e1720
RBP: 0000000000000003 R08: ffffffff82453122 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff94000175e87 R12: ffffea0000baf400
R13: ffffffff824534d7 R14: ffffffff8fd59ca0 R15: ffff88805438ddc0
rcu_lock_release include/linux/rcupdate.h:319 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
page_ext_put+0xa3/0xc0 mm/page_ext.c:570
__reset_page_owner+0x67/0x1f0 mm/page_owner.c:330
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
__slab_free+0x274/0x2c0 mm/slub.c:5823
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4683 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_node_track_caller_noprof+0x446/0x720 mm/slub.c:5545
__kmemdup_nul mm/util.c:64 [inline]
kstrdup+0x42/0x100 mm/util.c:84
__kernfs_new_node+0xa9/0x980 fs/kernfs/dir.c:663
kernfs_new_node+0xeb/0x140 fs/kernfs/dir.c:759
__kernfs_create_file+0x4b/0x2e0 fs/kernfs/file.c:1071
sysfs_add_file_mode_ns+0x237/0x300 fs/sysfs/file.c:316
create_files fs/sysfs/group.c:82 [inline]
internal_create_group+0x679/0x1180 fs/sysfs/group.c:189
internal_create_groups fs/sysfs/group.c:229 [inline]
sysfs_create_groups+0x59/0x120 fs/sysfs/group.c:255
setup_gid_attrs drivers/infiniband/core/sysfs.c:1123 [inline]
ib_setup_port_attrs+0x1780/0x2460 drivers/infiniband/core/sysfs.c:1399
add_one_compat_dev+0x441/0x640 drivers/infiniband/core/device.c:1002
rdma_dev_init_net+0x23e/0x2f0 drivers/infiniband/core/device.c:1227
ops_init+0x35d/0x5d0 net/core/net_namespace.c:137
setup_net+0x118/0x350 net/core/net_namespace.c:443
copy_net_ns+0x536/0x770 net/core/net_namespace.c:582
create_new_namespaces+0x3f0/0x6b0 kernel/nsproxy.c:132
unshare_nsproxy_namespaces+0x144/0x190 kernel/nsproxy.c:234
ksys_unshare+0x532/0x890 kernel/fork.c:3293
__do_sys_unshare kernel/fork.c:3359 [inline]
__se_sys_unshare kernel/fork.c:3357 [inline]
__x64_sys_unshare+0x38/0x50 kernel/fork.c:3357
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f23a279f559
RSP: 002b:00007f23a09f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f23a2a25fa0 RCX: 00007f23a279f559
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000066000080
RBP: 00007f23a2836b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f23a2a26038 R14: 00007f23a2a25fa0 R15: 00007ffda28a5778
rcu: rcu_preempt kthread starved for 1052 jiffies! g72805 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:28104 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
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: 10159 Comm: kworker/u8:28 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: krds_cp_wq#1/4 rds_connect_worker
RIP: 0010:trace_lock_release include/trace/events/lock.h:68 [inline]
RIP: 0010:lock_release+0x44/0x3c0 kernel/locking/lockdep.c:5954
Code: 8b 05 08 a5 f7 12 48 89 44 24 28 0f 1f 44 00 00 65 8b 05 07 a5 f7 12 83 f8 08 0f 83 60 02 00 00 89 c0 48 0f a3 05 74 67 d8 0f <73> 0d e8 45 25 09 00 84 c0 0f 84 9e 02 00 00 83 3d 86 98 d8 0f 00
RSP: 0018:ffffc90000a07a58 EFLAGS: 00000297
RAX: 0000000000000001 RBX: ffffc90000a07b78 RCX: 8000000000000102
RDX: ffffc90000a07b01 RSI: ffffffff8178699f RDI: ffffffff8fd59ca0
RBP: 1ffffffff2432601 R08: ffffc90000a07ca0 R09: 0000000000000000
R10: ffffc90000a07bb8 R11: fffff52000140f79 R12: ffffc90000a01000
R13: ffffffff8178699f R14: ffffffff8fd59ca0 R15: ffffc90000a07cb0
FS: 0000000000000000(0000) GS:ffff888123b6b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd95ba00218 CR3: 000000006700e000 CR4: 00000000003526f0
Call Trace:
rcu_lock_release include/linux/rcupdate.h:319 [inline]
rcu_read_unlock include/linux/rcupdate.h:880 [inline]
class_rcu_destructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0x1baa/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:264 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:296
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2748 [inline]
slab_free mm/slub.c:6509 [inline]
kmem_cache_free+0x182/0x650 mm/slub.c:6636
skb_ext_reset include/linux/skbuff.h:5145 [inline]
skb_release_head_state+0x274/0x370 net/core/skbuff.c:1180
skb_release_all net/core/skbuff.c:1186 [inline]
__kfree_skb+0x24/0x210 net/core/skbuff.c:1202
kfree_skb_reason include/linux/skbuff.h:1329 [inline]
kfree_skb include/linux/skbuff.h:1338 [inline]
ip6_mc_input+0x878/0xc80 net/ipv6/ip6_input.c:639
ip_sabotage_in+0x1e1/0x270 net/bridge/br_netfilter_hooks.c:989
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:633
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:323
__netif_receive_skb_one_core net/core/dev.c:6405 [inline]
__netif_receive_skb net/core/dev.c:6518 [inline]
netif_receive_skb_internal net/core/dev.c:6604 [inline]
netif_receive_skb+0x278/0xbf0 net/core/dev.c:6663
NF_HOOK+0xa4/0x3a0 include/linux/netfilter.h:325
br_handle_frame_finish+0x1219/0x1ae0 net/bridge/br_input.c:237
br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1
br_nf_pre_routing_finish_ipv6+0x90c/0xc40 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:325 [inline]
br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:293 [inline]
br_handle_frame+0x1329/0x1600 net/bridge/br_input.c:453
__netif_receive_skb_core+0x989/0x30c0 net/core/dev.c:6292
__netif_receive_skb_one_core net/core/dev.c:6403 [inline]
__netif_receive_skb net/core/dev.c:6518 [inline]
process_backlog+0x727/0x18b0 net/core/dev.c:6869
__napi_poll+0xaa/0x330 net/core/dev.c:7938
napi_poll net/core/dev.c:8001 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8158
handle_softirqs+0x265/0x8d0 kernel/softirq.c:669
do_softirq+0x77/0xd0 kernel/softirq.c:569
__local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
__inet6_bind+0x386/0xf30 net/ipv6/af_inet6.c:419
kernel_bind+0x13e/0x1c0 net/socket.c:3677
rds_tcp_conn_path_connect+0x53b/0x920 net/rds/tcp_connect.c:175
rds_connect_worker+0x1d8/0x290 net/rds/threads.c:176
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245