audit: type=1400 audit(1740931928.550:20747): avc: denied { getopt } for pid=18279 comm="syz.0.5362" lport=58 scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=rawip_socket permissive=1 audit: type=1400 audit(1740931928.620:20748): avc: denied { write } for pid=18279 comm="syz.0.5362" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_xfrm_socket permissive=1 ================================================================== BUG: KCSAN: data-race in data_push_tail / number write to 0xffffffff88be91f3 of 1 bytes by task 18280 on cpu 0: number+0x7f0/0xac0 lib/vsprintf.c:551 vsnprintf+0x6ae/0x890 lib/vsprintf.c:2807 vscnprintf+0x42/0x90 lib/vsprintf.c:2908 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2216 vprintk_store+0x589/0x870 kernel/printk/printk.c:2336 vprintk_emit+0x168/0x690 kernel/printk/printk.c:2408 vprintk_default+0x26/0x30 kernel/printk/printk.c:2447 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x7a/0xa0 kernel/printk/printk.c:2457 __nla_validate_parse+0x189c/0x1e50 lib/nlattr.c:647 __nla_parse+0x40/0x60 lib/nlattr.c:732 __nlmsg_parse include/net/netlink.h:764 [inline] nlmsg_parse_deprecated include/net/netlink.h:805 [inline] xfrm_user_rcv_msg+0x397/0x650 net/xfrm/xfrm_user.c:3430 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2533 xfrm_netlink_rcv+0x47/0x60 net/xfrm/xfrm_user.c:3469 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1882 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x140/0x180 net/socket.c:733 ____sys_sendmsg+0x326/0x4b0 net/socket.c:2573 ___sys_sendmsg net/socket.c:2627 [inline] __sys_sendmsg+0x19d/0x230 net/socket.c:2659 __do_sys_sendmsg net/socket.c:2664 [inline] __se_sys_sendmsg net/socket.c:2662 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2662 x64_sys_call+0x2734/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff88be91f0 of 8 bytes by task 29 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+0x168/0x690 kernel/printk/printk.c:2408 vprintk_default+0x26/0x30 kernel/printk/printk.c:2447 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x7a/0xa0 kernel/printk/printk.c:2457 kauditd_printk_skb kernel/audit.c:546 [inline] kauditd_hold_skb+0x1a3/0x1b0 kernel/audit.c:581 kauditd_send_queue+0x288/0x2e0 kernel/audit.c:766 kauditd_thread+0x42a/0x650 kernel/audit.c:890 kthread+0x4ae/0x520 kernel/kthread.c:464 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0x00000000fffffebd -> 0x6574796220383220 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 29 Comm: kauditd Tainted: G W 6.14.0-rc4-syzkaller-00278-gece144f151ac #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ================================================================== audit: type=1400 audit(1740931928.620:20749): avc: denied { nlmsg_write } for pid=18279 comm="syz.0.5362" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_xfrm_socket permissive=1 audit: type=1400 audit(1740931928.620:20750): avc: denied { create } for pid=18279 comm="syz.0.5362" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=vsock_socket permissive=1 audit: type=1326 audit(1740931928.630:20751): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=root:sysadm_r:sysadm_t pid=18279 comm="syz.0.5362" exe="/root/syz-executor" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f95eb91d169 code=0x0