bridge0: received packet on veth0_to_bridge with own address as source address (addr:36:bc:47:53:8f:01, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P20934/1:b..l rcu: (detected by 0, t=10502 jiffies, g=127837, q=682 ncpus=2) task:syz-executor state:R running task stack:23992 pid:20934 tgid:20934 ppid:20927 task_flags:0x400140 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1139/0x6150 kernel/sched/core.c:6863 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7190 irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:xas_load+0xc0/0x5b0 lib/xarray.c:244 Code: ea 03 0f b6 04 02 84 c0 74 06 0f 8e 86 03 00 00 4c 89 ea 44 0f b6 65 10 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 <84> c0 74 06 0f 8e 55 03 00 00 45 0f b6 75 00 44 89 e7 44 89 f6 e8 RSP: 0018:ffffc900040df5f0 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffff88807577d342 RCX: ffffffff8b762a21 RDX: 1ffff1100eaefa68 RSI: ffffffff8b762a2f RDI: ffffc900040df720 RBP: ffffc900040df710 R08: 0000000000000007 R09: 0000000000001000 R10: ffff88807577d342 R11: ffff88802e100b30 R12: 0000000000000000 R13: ffff88807577d340 R14: 0000000000000002 R15: 0000000000000001 xas_find+0x573/0x890 lib/xarray.c:1406 find_get_entry mm/filemap.c:2062 [inline] find_lock_entries+0x16e/0xbf0 mm/filemap.c:2166 shmem_undo_range+0x216/0x1140 mm/shmem.c:1119 shmem_truncate_range mm/shmem.c:1249 [inline] shmem_evict_inode+0x39e/0xbe0 mm/shmem.c:1379 evict+0x3c2/0xad0 fs/inode.c:837 iput_final fs/inode.c:1954 [inline] iput.part.0+0x621/0x1190 fs/inode.c:2006 iput+0x35/0x40 fs/inode.c:1969 do_unlinkat+0x3d2/0x660 fs/namei.c:5452 __do_sys_unlink fs/namei.c:5483 [inline] __se_sys_unlink fs/namei.c:5481 [inline] __x64_sys_unlink+0xc5/0x110 fs/namei.c:5481 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3c8878ecf7 RSP: 002b:00007ffe63ce6218 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3c8878ecf7 RDX: 00007ffe63ce6240 RSI: 00007ffe63ce62d0 RDI: 00007ffe63ce62d0 RBP: 00007ffe63ce62d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffe63ce7360 R13: 00007f3c88813d7d R14: 00000000001bbe0c R15: 00007ffe63ce73a0 rcu: rcu_preempt kthread starved for 5733 jiffies! g127837 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:27976 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5256 [inline] __schedule+0x1139/0x6150 kernel/sched/core.c:6863 __schedule_loop kernel/sched/core.c:6945 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:6960 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 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: 0 Comm: swapper/1 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__asan_memset+0x23/0x50 mm/kasan/shadow.c:84 Code: 90 90 90 90 90 90 90 f3 0f 1e fa 41 54 41 89 f4 55 48 89 d5 ba 01 00 00 00 53 48 8b 4c 24 18 48 89 ee 48 89 fb e8 ed ef ff ff <84> c0 74 12 48 89 ea 44 89 e6 48 89 df 5b 5d 41 5c e9 37 91 4f 09 RSP: 0018:ffffc90000a07b50 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffffc90000a07bc0 RCX: ffffffff816cd69e RDX: fffff52000140f84 RSI: 0000000000000060 RDI: ffffc90000a07bc0 RBP: 0000000000000060 R08: 0000000000000001 R09: fffff52000140f83 R10: ffffc90000a07c1f R11: dffffc0000000000 R12: 0000000000000000 R13: ffffc90000a07c80 R14: ffffc90000a07bc0 R15: ffffc90000a07be8 FS: 0000000000000000(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000400110 CR3: 000000007e3b1000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 000000000000f2de DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: __unwind_start+0x2e/0x7f0 arch/x86/kernel/unwind_orc.c:701 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0x73/0x100 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 save_stack+0x160/0x1f0 mm/page_owner.c:165 __set_page_owner+0x91/0x560 mm/page_owner.c:341 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857 prep_new_page mm/page_alloc.c:1865 [inline] get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915 __alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2486 alloc_slab_page mm/slub.c:3075 [inline] allocate_slab mm/slub.c:3248 [inline] new_slab+0x2c3/0x430 mm/slub.c:3302 ___slab_alloc+0xe18/0x1c90 mm/slub.c:4656 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4779 __slab_alloc_node mm/slub.c:4855 [inline] slab_alloc_node mm/slub.c:5251 [inline] __do_kmalloc_node mm/slub.c:5656 [inline] __kmalloc_noprof+0x4fc/0x910 mm/slub.c:5669 kmalloc_noprof include/linux/slab.h:961 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] cfg80211_inform_single_bss_data+0x542/0x1d30 net/wireless/scan.c:2345 cfg80211_inform_bss_data+0x22b/0x3be0 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x26f/0x720 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x310/0xab0 net/mac80211/scan.c:230 ieee80211_scan_rx+0x4cf/0xb30 net/mac80211/scan.c:359 __ieee80211_rx_handle_packet net/mac80211/rx.c:5287 [inline] ieee80211_rx_list+0x1c40/0x2ed0 net/mac80211/rx.c:5544 ieee80211_rx_napi+0xdc/0x410 net/mac80211/rx.c:5567 ieee80211_rx include/net/mac80211.h:5216 [inline] ieee80211_handle_queued_frames+0xcf/0x130 net/mac80211/main.c:452 tasklet_action_common+0x254/0x3f0 kernel/softirq.c:925 handle_softirqs+0x219/0x950 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82 Code: a6 5f 02 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 13 19 12 00 fb f4 cc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 RSP: 0018:ffffc90000197de8 EFLAGS: 000002c6 RAX: 00000000052beaab RBX: 0000000000000001 RCX: ffffffff8b7846d9 RDX: 0000000000000000 RSI: ffffffff8dacea71 RDI: ffffffff8bf2b400 RBP: ffffed1003b56498 R08: 0000000000000001 R09: ffffed10170a673d R10: ffff8880b85339eb R11: ffff88801dab2ff0 R12: 0000000000000001 R13: ffff88801dab24c0 R14: ffffffff9088b9d0 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0x13/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x38d/0x510 kernel/sched/idle.c:332 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430 start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312 common_startup_64+0x13e/0x148 net_ratelimit: 10895 callbacks suppressed bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:17, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:17, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:36:bc:47:53:8f:01, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:36:bc:47:53:8f:01, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:17, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:17, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:36:bc:47:53:8f:01, vlan:0) net_ratelimit: 13031 callbacks suppressed bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:17, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:17, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:36:bc:47:53:8f:01, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:36:bc:47:53:8f:01, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:17, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:17, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:36:bc:47:53:8f:01, vlan:0)