bridge0: received packet on bridge_slave_0 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): P19906/1:b..l rcu: (detected by 1, t=10503 jiffies, g=135609, q=821 ncpus=2) task:syz.1.3441 state:R running task stack:20488 pid:19906 tgid:19906 ppid:18399 task_flags:0x400740 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5258 [inline] __schedule+0x150e/0x5070 kernel/sched/core.c:6866 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7193 irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x40 kernel/rcu/update.c:319 Code: 48 8d 3d 53 d3 5f 04 48 c7 c6 9f 6f a9 8d 67 48 0f b9 3a 90 eb ca cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 31 c0 83 3d 17 89 5c 04 00 74 1e 83 3d 2a b8 5c 04 00 RSP: 0018:ffffc9000ca45b10 EFLAGS: 00000206 RAX: ffffc9000ca48000 RBX: ffffffff90652d01 RCX: ffffc9000ca46368 RDX: ffffc9000ca45c01 RSI: dffffc0000000000 RDI: ffffc9000ca45bf0 RBP: dffffc0000000000 R08: ffffc9000ca46350 R09: 0000000000000000 R10: ffffc9000ca45c38 R11: fffff52001948b89 R12: ffffc9000ca46360 R13: ffffc9000ca40000 R14: ffffc9000ca45be8 R15: ffffffff81746f85 rcu_read_unlock include/linux/rcupdate.h:895 [inline] class_rcu_destructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0x1a64/0x23d0 arch/x86/kernel/unwind_orc.c:695 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf5/0x1f0 mm/page_owner.c:165 __set_page_owner+0x8d/0x4c0 mm/page_owner.c:341 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857 prep_new_page mm/page_alloc.c:1865 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3915 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486 folio_alloc_mpol_noprof+0x39/0x70 mm/mempolicy.c:2505 shmem_alloc_folio mm/shmem.c:1902 [inline] shmem_alloc_and_add_folio+0x423/0xf40 mm/shmem.c:1944 shmem_get_folio_gfp+0x59d/0x1660 mm/shmem.c:2568 shmem_get_folio mm/shmem.c:2674 [inline] shmem_write_begin+0x16c/0x330 mm/shmem.c:3327 generic_perform_write+0x2c5/0x900 mm/filemap.c:4314 shmem_file_write_iter+0xf8/0x120 mm/shmem.c:3502 do_iter_readv_writev+0x623/0x8c0 fs/read_write.c:-1 vfs_iter_write+0x238/0x600 fs/read_write.c:981 do_backing_file_write_iter fs/backing-file.c:223 [inline] backing_file_write_iter+0x5e3/0x950 fs/backing-file.c:271 ovl_write_iter+0x297/0x350 fs/overlayfs/file.c:369 __kernel_write_iter+0x428/0x910 fs/read_write.c:619 dump_emit_page fs/coredump.c:1298 [inline] dump_user_range+0x8a0/0xc90 fs/coredump.c:1372 elf_core_dump+0x3369/0x3960 fs/binfmt_elf.c:2111 coredump_write+0x1121/0x18b0 fs/coredump.c:1049 do_coredump fs/coredump.c:1126 [inline] vfs_coredump+0x3321/0x3e60 fs/coredump.c:1200 get_signal+0x1108/0x1340 kernel/signal.c:3019 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline] exit_to_user_mode_loop kernel/entry/common.c:75 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline] irqentry_exit+0x177/0x660 kernel/entry/common.c:196 exc_general_protection+0x171/0x1f0 arch/x86/kernel/traps.c:913 asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:612 RIP: 0033:0x7f708658f751 RSP: 002b:00002000000005a0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f70867e5fa0 RCX: 00007f708658f749 RDX: 0000200000000000 RSI: 00002000000005a0 RDI: 00000000018a0400 RBP: 00007f7086613f91 R08: 00002000000006c0 R09: 00002000000006c0 R10: 0000200000000480 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f70867e6038 R14: 00007f70867e5fa0 R15: 00007ffd91c4e0c8 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 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) 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) net_ratelimit: 16125 callbacks suppressed 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) 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) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)