ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on veth0_to_bridge! rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P17542/1:b..l rcu: (detected by 1, t=10503 jiffies, g=284725, q=1682 ncpus=2) task:syz.4.11296 state:R running task stack:25640 pid:17542 tgid:17542 ppid:12058 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x30/0x70 kernel/kcov.c:217 Code: 04 24 65 48 8b 0d 78 4e a6 11 65 8b 15 99 4e a6 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 24 17 00 00 00 74 2c <8b> 91 f8 16 00 00 83 fa 02 75 21 48 8b 91 00 17 00 00 48 8b 32 48 RSP: 0018:ffffc900064c7490 EFLAGS: 00000246 RAX: ffffffff823fa03d RBX: ffff88801f4c7560 RCX: ffff888026728000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801f4c7560 RBP: 0000000000000000 R08: ffffffff823f9d12 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8eb59c60 R12: ffffea000209f780 R13: 00000e000014e123 R14: ffffea000209f780 R15: 0000015ef28e4bcc page_ext_put+0xd/0xc0 mm/page_ext.c:575 __reset_page_owner+0x67/0x1f0 mm/page_owner.c:312 reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0xc1e/0xd10 mm/page_alloc.c:2950 __slab_free+0x274/0x2c0 mm/slub.c:5767 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:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4612 [inline] slab_alloc_node mm/slub.c:4945 [inline] kmem_cache_alloc_noprof+0x2a0/0x5f0 mm/slub.c:4959 vm_area_dup+0x28/0x670 mm/vma_init.c:123 __split_vma+0x1dc/0xa50 mm/vma.c:516 split_vma mm/vma.c:599 [inline] vma_modify+0x93a/0x1c70 mm/vma.c:1699 vma_modify_flags+0x24b/0x330 mm/vma.c:1719 mprotect_fixup+0x624/0xb10 mm/mprotect.c:789 do_mprotect_pkey+0x9d3/0xcd0 mm/mprotect.c:967 __do_sys_mprotect mm/mprotect.c:988 [inline] __se_sys_mprotect mm/mprotect.c:985 [inline] __x64_sys_mprotect+0x80/0x90 mm/mprotect.c:985 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f68b4b9dc97 RSP: 002b:00007ffddd1e2a48 EFLAGS: 00000206 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00007f68b59c56c0 RCX: 00007f68b4b9dc97 RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f68b59a6000 RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000021000 R11: 0000000000000206 R12: 00007ffddd1e2ba0 R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000 ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on veth0_to_bridge! bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on veth0_to_bridge! bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on veth0_to_bridge! net_ratelimit: 21519 callbacks suppressed bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on veth0_to_bridge! bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) ICMPv6: NA: aa:aa:aa:aa:aa:1b advertised our address fe80::a8aa:aaff:feaa:aa1b on veth0_to_bridge! bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)