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================================================================== BUG: KCSAN: data-race in wg_socket_send_skb_to_peer / wg_socket_send_skb_to_peer read-write to 0xffff88811af56a58 of 8 bytes by task 167 on cpu 1: wg_socket_send_skb_to_peer+0xe8/0x130 drivers/net/wireguard/socket.c:183 wg_socket_send_buffer_to_peer+0xf1/0x120 drivers/net/wireguard/socket.c:200 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline] wg_packet_handshake_send_worker+0x10d/0x160 drivers/net/wireguard/send.c:51 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3346 worker_thread+0x582/0x770 kernel/workqueue.c:3427 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x13f/0x270 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read-write to 0xffff88811af56a58 of 8 bytes by task 3503 on cpu 0: wg_socket_send_skb_to_peer+0xe8/0x130 drivers/net/wireguard/socket.c:183 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline] wg_packet_tx_worker+0x12d/0x330 drivers/net/wireguard/send.c:276 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3346 worker_thread+0x582/0x770 kernel/workqueue.c:3427 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x13f/0x270 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x000000000000005c -> 0x00000000000000f0 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3503 Comm: kworker/0:9 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: wg-crypt-wg2 wg_packet_tx_worker ==================================================================
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/12/02 23:00 | upstream | 4a26e7032d7d | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in wg_socket_send_skb_to_peer / wg_socket_send_skb_to_peer | ||
| 2025/11/30 20:30 | upstream | e69c7c175115 | d6526ea3 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in wg_socket_send_skb_to_peer / wg_socket_send_skb_to_peer | ||
| 2025/11/14 08:12 | upstream | 6da43bbeb691 | 07e030de | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-upstream-kcsan-gce | KCSAN: data-race in wg_socket_send_skb_to_peer / wg_socket_send_skb_to_peer |