================================================================== BUG: KCSAN: data-race in br_handle_frame_finish / br_handle_frame_finish write to 0xffff888097251148 of 8 bytes by interrupt on cpu 0: br_handle_frame_finish+0x942/0xa10 net/bridge/br_input.c:146 br_nf_hook_thresh+0x184/0x1c0 net/bridge/br_netfilter_hooks.c:1021 br_nf_pre_routing_finish_ipv6+0x4ab/0x4c0 net/bridge/br_netfilter_ipv6.c:187 NF_HOOK include/linux/netfilter.h:301 [inline] br_nf_pre_routing_ipv6+0x1ed/0x280 net/bridge/br_netfilter_ipv6.c:236 br_nf_pre_routing+0x4d6/0xb40 net/bridge/br_netfilter_hooks.c:505 nf_hook_entry_hookfn include/linux/netfilter.h:136 [inline] nf_hook_bridge_pre net/bridge/br_input.c:228 [inline] br_handle_frame+0x413/0xb10 net/bridge/br_input.c:356 __netif_receive_skb_core+0xea9/0x1da0 net/core/dev.c:5180 __netif_receive_skb_one_core net/core/dev.c:5284 [inline] __netif_receive_skb+0x52/0x1b0 net/core/dev.c:5400 process_backlog+0x29f/0x4a0 net/core/dev.c:6242 napi_poll+0x178/0x4f0 net/core/dev.c:6688 net_rx_action+0x1ba/0x530 net/core/dev.c:6758 __do_softirq+0x198/0x360 kernel/softirq.c:298 run_ksoftirqd+0x2f/0x60 kernel/softirq.c:652 smpboot_thread_fn+0x347/0x530 kernel/smpboot.c:165 kthread+0x20d/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 read to 0xffff888097251148 of 8 bytes by interrupt on cpu 1: br_handle_frame_finish+0x930/0xa10 net/bridge/br_input.c:146 br_nf_hook_thresh+0x184/0x1c0 net/bridge/br_netfilter_hooks.c:1021 br_nf_pre_routing_finish_ipv6+0x4ab/0x4c0 net/bridge/br_netfilter_ipv6.c:187 NF_HOOK include/linux/netfilter.h:301 [inline] br_nf_pre_routing_ipv6+0x1ed/0x280 net/bridge/br_netfilter_ipv6.c:236 br_nf_pre_routing+0x4d6/0xb40 net/bridge/br_netfilter_hooks.c:505 nf_hook_entry_hookfn include/linux/netfilter.h:136 [inline] nf_hook_bridge_pre net/bridge/br_input.c:228 [inline] br_handle_frame+0x413/0xb10 net/bridge/br_input.c:356 __netif_receive_skb_core+0xea9/0x1da0 net/core/dev.c:5180 __netif_receive_skb_one_core net/core/dev.c:5284 [inline] __netif_receive_skb+0x52/0x1b0 net/core/dev.c:5400 process_backlog+0x29f/0x4a0 net/core/dev.c:6242 napi_poll+0x178/0x4f0 net/core/dev.c:6688 net_rx_action+0x1ba/0x530 net/core/dev.c:6758 __do_softirq+0x198/0x360 kernel/softirq.c:298 run_ksoftirqd+0x2f/0x60 kernel/softirq.c:652 smpboot_thread_fn+0x347/0x530 kernel/smpboot.c:165 kthread+0x20d/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.9.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================