================================================================== BUG: KCSAN: data-race in pollwake / pollwake write to 0xffffc9000122ba00 of 4 bytes by interrupt on cpu 1: __pollwake fs/select.c:198 [inline] pollwake+0xbe/0x110 fs/select.c:218 __wake_up_common kernel/sched/wait.c:89 [inline] __wake_up_common_lock kernel/sched/wait.c:106 [inline] __wake_up+0x65/0xb0 kernel/sched/wait.c:127 bpf_ringbuf_notify+0x22/0x30 kernel/bpf/ringbuf.c:152 irq_work_single kernel/irq_work.c:221 [inline] irq_work_run_list kernel/irq_work.c:252 [inline] irq_work_run+0xdf/0x2c0 kernel/irq_work.c:261 __sysvec_irq_work+0x23/0x1a0 arch/x86/kernel/irq_work.c:22 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0x66/0x80 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 native_apic_mem_write arch/x86/include/asm/apic.h:96 [inline] __default_send_IPI_shortcut arch/x86/kernel/apic/ipi.c:166 [inline] default_send_IPI_self+0x38/0x80 arch/x86/kernel/apic/ipi.c:247 __apic_send_IPI_self arch/x86/include/asm/apic.h:460 [inline] arch_irq_work_raise+0x48/0x50 arch/x86/kernel/irq_work.c:31 irq_work_raise kernel/irq_work.c:84 [inline] __irq_work_queue_local+0x82/0x1d0 kernel/irq_work.c:112 irq_work_queue+0x85/0x120 kernel/irq_work.c:124 ____bpf_ringbuf_discard kernel/bpf/ringbuf.c:513 [inline] bpf_ringbuf_discard+0xcd/0xf0 kernel/bpf/ringbuf.c:511 ___bpf_prog_run+0x9ab/0x46c0 kernel/bpf/core.c:2012 __bpf_prog_run32+0x74/0xa0 kernel/bpf/core.c:2253 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2403 [inline] bpf_trace_run3+0x10c/0x1d0 kernel/trace/bpf_trace.c:2445 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x1fe/0x280 mm/slub.c:4511 __kfree_skb+0x102/0x150 net/core/skbuff.c:1188 consume_skb+0x57/0x180 net/core/skbuff.c:1409 macvlan_process_broadcast+0x28c/0x310 drivers/net/macvlan.c:343 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3312 worker_thread+0x526/0x730 kernel/workqueue.c:3393 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 write to 0xffffc9000122ba00 of 4 bytes by task 2287 on cpu 0: __pollwake fs/select.c:198 [inline] pollwake+0xbe/0x110 fs/select.c:218 __wake_up_common kernel/sched/wait.c:89 [inline] __wake_up_common_lock kernel/sched/wait.c:106 [inline] __wake_up_sync_key+0x51/0x80 kernel/sched/wait.c:173 sock_def_readable+0x70/0x1b0 net/core/sock.c:3353 packet_rcv+0x8d1/0x940 net/packet/af_packet.c:2216 dev_queue_xmit_nit+0x5c2/0x620 net/core/dev.c:2343 xmit_one net/core/dev.c:3574 [inline] dev_hard_start_xmit+0xcc/0x3f0 net/core/dev.c:3594 __dev_queue_xmit+0xf83/0x1e50 net/core/dev.c:4393 dev_queue_xmit include/linux/netdevice.h:3095 [inline] neigh_resolve_output+0x3e3/0x450 net/core/neighbour.c:1565 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0xa73/0xd10 net/ipv6/ip6_output.c:137 ip6_finish_output+0x438/0x540 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0xf4/0x220 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0x4a0/0x6b0 net/ipv6/ndisc.c:509 ndisc_send_ns+0x79/0xe0 net/ipv6/ndisc.c:667 addrconf_dad_work+0x6f1/0xbd0 net/ipv6/addrconf.c:4281 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3312 worker_thread+0x526/0x730 kernel/workqueue.c:3393 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 2287 Comm: kworker/u8:5 Not tainted 6.10.0-rc5-syzkaller-00012-g626737a5791b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: ipv6_addrconf addrconf_dad_work ==================================================================