ipvlan2319: entered allmulticast mode ================================================================== BUG: KCSAN: data-race in data_push_tail / number write to 0xffffffff86e9eb14 of 1 bytes by task 5212 on cpu 0: number+0x7d0/0xa90 lib/vsprintf.c:563 vsnprintf+0xa44/0xe20 lib/vsprintf.c:2884 vscnprintf+0x42/0x80 lib/vsprintf.c:2924 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2128 vprintk_store+0x56f/0x800 kernel/printk/printk.c:2242 vprintk_emit+0xd0/0x5d0 kernel/printk/printk.c:2288 vprintk_default+0x26/0x30 kernel/printk/printk.c:2322 vprintk+0x71/0x80 kernel/printk/printk_safe.c:45 _printk+0x7a/0xa0 kernel/printk/printk.c:2332 set_capacity_and_notify+0x11d/0x170 block/genhd.c:86 loop_set_size+0x2e/0x70 drivers/block/loop.c:237 loop_configure+0xaf9/0xca0 drivers/block/loop.c:1100 lo_ioctl+0x682/0x12e0 blkdev_ioctl+0x375/0x460 block/ioctl.c:630 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xcf/0x140 fs/ioctl.c:857 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffffffff86e9eb10 of 8 bytes by task 5204 on cpu 1: data_make_reusable kernel/printk/printk_ringbuffer.c:590 [inline] data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:675 data_alloc+0xbe/0x2c0 kernel/printk/printk_ringbuffer.c:1046 prb_reserve+0x893/0xbc0 kernel/printk/printk_ringbuffer.c:1555 vprintk_store+0x53e/0x800 kernel/printk/printk.c:2232 vprintk_emit+0xd0/0x5d0 kernel/printk/printk.c:2288 vprintk_default+0x26/0x30 kernel/printk/printk.c:2322 vprintk+0x71/0x80 kernel/printk/printk_safe.c:45 _printk+0x7a/0xa0 kernel/printk/printk.c:2332 __netdev_printk+0x2bf/0x3b0 net/core/dev.c:11371 netdev_info+0x99/0xc0 net/core/dev.c:11418 __dev_set_allmulti+0x18c/0x280 net/core/dev.c:8486 __dev_change_flags+0x31c/0x400 net/core/dev.c:8648 rtnl_configure_link net/core/rtnetlink.c:3296 [inline] rtnl_newlink_create net/core/rtnetlink.c:3493 [inline] __rtnl_newlink net/core/rtnetlink.c:3705 [inline] rtnl_newlink+0x1200/0x1670 net/core/rtnetlink.c:3718 rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6442 netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2545 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6460 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x589/0x650 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x37c/0x4d0 net/socket.c:2558 ___sys_sendmsg net/socket.c:2612 [inline] __sys_sendmsg+0x1e9/0x270 net/socket.c:2641 __do_sys_sendmsg net/socket.c:2650 [inline] __se_sys_sendmsg net/socket.c:2648 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2648 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x000000010000abde -> 0x0a3832383231206f Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 5204 Comm: syz-executor.1 Not tainted 6.6.0-rc7-syzkaller-00137-g750b95887e56 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 ================================================================== 8021q: adding VLAN 0 to HW filter on device ipvlan2319 syz-executor.1 (5204) used greatest stack depth: 9112 bytes left