batman_adv: batadv2774: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2774: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2775: No IGMP Querier present - multicast optimizations disabled ================================================================== BUG: KCSAN: data-race in data_alloc / prb_reserve write to 0xffffffff85c808b0 of 8 bytes by task 30972 on cpu 1: data_alloc+0x291/0x2c0 kernel/printk/printk_ringbuffer.c:1088 prb_reserve+0x897/0xbc0 kernel/printk/printk_ringbuffer.c:1555 vprintk_store+0x53e/0x800 kernel/printk/printk.c:2228 vprintk_emit+0xd0/0x5d0 kernel/printk/printk.c:2284 vprintk_default+0x26/0x30 kernel/printk/printk.c:2318 vprintk+0x71/0x80 kernel/printk/printk_safe.c:45 _printk+0x7a/0xa0 kernel/printk/printk.c:2328 __netdev_printk+0x2dc/0x3f0 net/core/dev.c:11489 netdev_info+0x99/0xc0 net/core/dev.c:11536 __dev_set_promiscuity+0x189/0x370 net/core/dev.c:8439 __dev_change_flags+0x1ec/0x410 net/core/dev.c:8657 rtnl_configure_link net/core/rtnetlink.c:3329 [inline] rtnl_newlink_create net/core/rtnetlink.c:3526 [inline] __rtnl_newlink net/core/rtnetlink.c:3738 [inline] rtnl_newlink+0x120e/0x1670 net/core/rtnetlink.c:3751 rtnetlink_rcv_msg+0x80a/0x8c0 net/core/rtnetlink.c:6617 netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2543 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6635 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x589/0x660 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x37c/0x4d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x1e9/0x270 net/socket.c:2667 __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffffffff85c808b0 of 8 bytes by task 7789 on cpu 0: desc_read kernel/printk/printk_ringbuffer.c:478 [inline] desc_push_tail kernel/printk/printk_ringbuffer.c:774 [inline] desc_reserve kernel/printk/printk_ringbuffer.c:920 [inline] prb_reserve+0x229/0xbc0 kernel/printk/printk_ringbuffer.c:1505 vprintk_store+0x53e/0x800 kernel/printk/printk.c:2228 vprintk_emit+0xd0/0x5d0 kernel/printk/printk.c:2284 vprintk_default+0x26/0x30 kernel/printk/printk.c:2318 vprintk+0x71/0x80 kernel/printk/printk_safe.c:45 _printk+0x7a/0xa0 kernel/printk/printk.c:2328 batadv_mcast_bridge_log net/batman-adv/multicast.c:823 [inline] batadv_mcast_mla_flags_update net/batman-adv/multicast.c:879 [inline] __batadv_mcast_mla_update net/batman-adv/multicast.c:923 [inline] batadv_mcast_mla_update+0x16b4/0x1700 net/batman-adv/multicast.c:949 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x5b8/0xa40 kernel/workqueue.c:2706 worker_thread+0x525/0x730 kernel/workqueue.c:2787 kthread+0x1d7/0x210 kernel/kthread.c:388 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:243 value changed: 0x00000000005351e0 -> 0x00000000005c2ea8 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7789 Comm: kworker/u4:21 Not tainted 6.8.0-rc7-syzkaller-00020-g5847c9777c30 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: bat_events batadv_mcast_mla_update ================================================================== batman_adv: batadv2775: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2776: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2776: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2777: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2777: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2778: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2778: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2779: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2779: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2780: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2780: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2781: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2781: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2782: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2782: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2783: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2783: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2784: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2784: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2785: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2785: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2786: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2786: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2789: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2789: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2790: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2790: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2791: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2791: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2792: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2792: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2793: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2793: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2794: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2794: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2795: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2795: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2796: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2796: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2797: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2797: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2798: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2798: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2799: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2799: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2800: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2800: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2801: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2801: No MLD Querier present - multicast optimizations disabled nci: nci_rx_work: unknown MT 0x5 batman_adv: batadv2839: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2839: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2840: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2840: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2841: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2841: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2842: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2842: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2843: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2843: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2844: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2844: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2845: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2845: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2846: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2846: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2847: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2847: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2848: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2848: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2849: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2849: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2850: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2850: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2851: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2851: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2852: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2852: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2853: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2853: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2854: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2854: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2855: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2855: No MLD Querier present - multicast optimizations disabled batman_adv: batadv2856: No IGMP Querier present - multicast optimizations disabled batman_adv: batadv2856: No MLD Querier present - multicast optimizations disabled