SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=9225 comm=syz-executor.4 ================================================================== BUG: KCSAN: data-race in data_push_tail / number write to 0xffffffff86f35ca2 of 1 bytes by task 9224 on cpu 1: number+0x7d0/0xa90 lib/vsprintf.c:562 vsnprintf+0xa44/0xe20 lib/vsprintf.c:2883 vscnprintf+0x42/0x80 lib/vsprintf.c:2923 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2128 vprintk_store+0x56f/0x800 kernel/printk/printk.c:2242 vprintk_emit+0xd0/0x430 kernel/printk/printk.c:2288 vprintk_default+0x26/0x30 kernel/printk/printk.c:2318 vprintk+0x83/0x90 kernel/printk/printk_safe.c:50 _printk+0x7a/0xa0 kernel/printk/printk.c:2328 selinux_netlink_send+0x393/0x400 security/selinux/hooks.c:5882 security_netlink_send+0x3e/0x70 security/security.c:3828 netlink_sendmsg+0x563/0x770 net/netlink/af_netlink.c:1904 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg net/socket.c:748 [inline] ____sys_sendmsg+0x37c/0x4d0 net/socket.c:2494 ___sys_sendmsg net/socket.c:2548 [inline] __sys_sendmsg+0x1e9/0x270 net/socket.c:2577 __do_sys_sendmsg net/socket.c:2586 [inline] __se_sys_sendmsg net/socket.c:2584 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2584 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 0xffffffff86f35ca0 of 8 bytes by task 9225 on cpu 0: 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+0xd0/0x430 kernel/printk/printk.c:2288 vprintk_default+0x26/0x30 kernel/printk/printk.c:2318 vprintk+0x83/0x90 kernel/printk/printk_safe.c:50 _printk+0x7a/0xa0 kernel/printk/printk.c:2328 selinux_netlink_send+0x393/0x400 security/selinux/hooks.c:5882 security_netlink_send+0x3e/0x70 security/security.c:3828 netlink_sendmsg+0x563/0x770 net/netlink/af_netlink.c:1904 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg net/socket.c:748 [inline] ____sys_sendmsg+0x37c/0x4d0 net/socket.c:2494 ___sys_sendmsg net/socket.c:2548 [inline] __sys_sendmsg+0x1e9/0x270 net/socket.c:2577 __do_sys_sendmsg net/socket.c:2586 [inline] __se_sys_sendmsg net/socket.c:2584 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2584 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: 0x0000000100001a7d -> 0x0000000100003d6c Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 9225 Comm: syz-executor.4 Not tainted 6.5.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 ==================================================================