bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5836/1:b..l rcu: (detected by 1, t=10503 jiffies, g=7037, q=346 ncpus=2) task:syz-executor state:R running task stack:20344 pid:5836 tgid:5836 ppid:5834 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7012 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:stack_trace_consume_entry+0xdb/0x280 kernel/stacktrace.c:93 Code: 89 f5 4d 89 c6 e8 a5 05 7e 00 4d 89 f0 4c 8b 0c 24 4c 89 ee 48 ba 00 00 00 00 00 fc ff df 48 8b 1b 45 8d 70 01 41 0f b6 04 17 <84> c0 0f 85 31 01 00 00 45 89 31 4a 8d 1c c3 48 89 d8 48 c1 e8 03 RSP: 0018:ffffc90003fef610 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc90003fef820 RCX: ffffffff917bc000 RDX: dffffc0000000000 RSI: ffffffff8214031e RDI: ffffc90003fef74c RBP: ffffc90003fef748 R08: 000000000000000a R09: ffffc90003fef750 R10: ffffc90003fef6b0 R11: ffffffff81809280 R12: 1ffff920007fdee9 R13: 1ffff920007fdee9 R14: 000000000000000b R15: 1ffff920007fdeea arch_stack_walk+0x10e/0x150 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 save_stack+0xfb/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x76/0x430 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 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] kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4153 __d_alloc+0x31/0x700 fs/dcache.c:1636 d_alloc+0x4b/0x190 fs/dcache.c:1716 lookup_one_qstr_excl+0xce/0x260 fs/namei.c:1629 filename_create+0x297/0x540 fs/namei.c:4027 do_mkdirat+0xbd/0x3a0 fs/namei.c:4272 __do_sys_mkdirat fs/namei.c:4295 [inline] __se_sys_mkdirat fs/namei.c:4293 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4293 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: 0033:0x7f7a3777cfb7 RSP: 002b:00007ffe618e46e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007ffe618e4730 RCX: 00007f7a3777cfb7 RDX: 00000000000001ff RSI: 00007ffe618e4730 RDI: 00000000ffffff9c RBP: 00007ffe618e471c R08: 0000000000000003 R09: 00007ffe618e4487 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000062 R13: 00000000000123c7 R14: 000000000000ee85 R15: 00007ffe618e4770 rcu: rcu_preempt kthread starved for 3956 jiffies! g7037 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:25920 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6782 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 3389 Comm: kworker/R-bat_e Not tainted 6.12.0-rc5-syzkaller-00179-gb2183187c5fd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: bat_events batadv_dat_purge RIP: 0010:unwind_next_frame+0x0/0x22d0 arch/x86/kernel/unwind_orc.c:469 Code: cc cc 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 91 4c 89 f7 e8 93 42 bd 00 eb 87 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 81 ec 98 00 00 00 49 RSP: 0018:ffffc900000072f8 EFLAGS: 00000283 RAX: ffffc900000073f0 RBX: ffffc90000007398 RCX: 0000000000000002 RDX: dffffc0000000000 RSI: ffffffff8e1d9561 RDI: ffffc90000007360 RBP: 1ffff92000000e6d R08: ffffc90000007300 R09: 0000000000000000 R10: ffffc90000007360 R11: fffff52000000e78 R12: 1ffff92000000e6e R13: ffffc90000007370 R14: ffffc90000007360 R15: ffffc90000007368 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffeb90dae80 CR3: 0000000028720000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __unwind_start+0x59a/0x740 arch/x86/kernel/unwind_orc.c:760 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe5/0x150 arch/x86/kernel/stacktrace.c:24 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 kfree_skb_reason include/linux/skbuff.h:1262 [inline] kfree_skb include/linux/skbuff.h:1271 [inline] ip6_mc_input+0xa1f/0xc30 net/ipv6/ip6_input.c:587 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5670 [inline] __netif_receive_skb+0x1ea/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 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 spin_unlock_bh include/linux/spinlock.h:396 [inline] __batadv_dat_purge net/batman-adv/distributed-arp-table.c:186 [inline] batadv_dat_purge+0x2de/0x3c0 net/batman-adv/distributed-arp-table.c:205 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 rescuer_thread+0x63f/0x10a0 kernel/workqueue.c:3487 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: 18624 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge 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:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge 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:56:c4:58:38:8d:e7, 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:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 18079 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, 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:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:c4:58:38:8d:e7, vlan:0)