================================================================== BUG: KCSAN: data-race in data_alloc / data_push_tail write to 0xffffffff88b9c290 of 8 bytes by task 18018 on cpu 0: data_alloc+0x216/0x2c0 kernel/printk/printk_ringbuffer.c:1082 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669 vprintk_store+0x558/0x870 kernel/printk/printk.c:2326 vprintk_emit+0x15e/0x680 kernel/printk/printk.c:2408 dev_vprintk_emit+0x1df/0x210 drivers/base/core.c:4935 dev_printk_emit+0x82/0xb0 drivers/base/core.c:4946 __dev_printk+0xf6/0x110 drivers/base/core.c:4958 _dev_warn+0x99/0xc0 drivers/base/core.c:5002 hid_parser_main+0x622/0x680 drivers/hid/hid-core.c:660 hid_open_report+0x541/0x7c0 drivers/hid/hid-core.c:1322 hid_parse include/linux/hid.h:1123 [inline] hid_generic_probe+0x33/0x70 drivers/hid/hid-generic.c:66 __hid_device_probe drivers/hid/hid-core.c:2718 [inline] hid_device_probe+0x259/0x440 drivers/hid/hid-core.c:2755 really_probe+0x1cf/0x5d0 drivers/base/dd.c:658 __driver_probe_device+0x12d/0x200 drivers/base/dd.c:800 driver_probe_device+0x38/0x2f0 drivers/base/dd.c:830 __device_attach_driver+0x216/0x320 drivers/base/dd.c:958 bus_for_each_drv+0x1cd/0x240 drivers/base/bus.c:459 __device_attach+0x1c7/0x290 drivers/base/dd.c:1030 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1079 bus_probe_device+0x141/0x1d0 drivers/base/bus.c:534 device_add+0x5e2/0x790 drivers/base/core.c:3665 hid_add_device+0x26e/0x2f0 drivers/hid/hid-core.c:2901 uhid_device_add_worker+0x2b/0xa0 drivers/hid/uhid.c:73 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3310 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391 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 read to 0xffffffff88b9c290 of 8 bytes by task 9277 on cpu 1: data_make_reusable kernel/printk/printk_ringbuffer.c:594 [inline] data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:679 data_alloc+0xbe/0x2c0 kernel/printk/printk_ringbuffer.c:1054 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669 vprintk_store+0x558/0x870 kernel/printk/printk.c:2326 vprintk_emit+0x15e/0x680 kernel/printk/printk.c:2408 vprintk_default+0x26/0x30 kernel/printk/printk.c:2447 vprintk+0x75/0x80 kernel/printk/printk_safe.c:86 _printk+0x7a/0xa0 kernel/printk/printk.c:2457 ip_vs_schedule+0xde2/0xeb0 net/netfilter/ipvs/ip_vs_core.c:518 udp_conn_schedule+0x248/0x3b0 net/netfilter/ipvs/ip_vs_proto_udp.c:78 ip_vs_try_to_schedule net/netfilter/ipvs/ip_vs_core.c:1482 [inline] ip_vs_in_hook+0x5d2/0x1210 net/netfilter/ipvs/ip_vs_core.c:2054 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0x86/0x1b0 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] __ip_local_out+0x2d6/0x300 net/ipv4/ip_output.c:119 ip_local_out+0x26/0xd0 net/ipv4/ip_output.c:128 iptunnel_xmit+0x351/0x490 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x1ae/0x1f0 net/ipv4/udp_tunnel_core.c:173 send4+0x44c/0x530 drivers/net/wireguard/socket.c:85 wg_socket_send_skb_to_peer+0x94/0x130 drivers/net/wireguard/socket.c:175 wg_socket_send_buffer_to_peer+0xee/0x120 drivers/net/wireguard/socket.c:200 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline] wg_packet_handshake_send_worker+0x10c/0x150 drivers/net/wireguard/send.c:51 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3310 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391 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: 0x0000000100007503 -> 0x00000001000080a7 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 9277 Comm: kworker/u8:9 Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: wg-kex-wg1 wg_packet_handshake_send_worker ================================================================== IPVS: Schedule: port zero only supported in persistent services, check your ipvs configuration