==================================================================
BUG: KCSAN: data-race in data_alloc / prb_reserve

write to 0xffffffff86889d38 of 8 bytes by task 29 on cpu 1:
 data_alloc+0x27d/0x2b0 kernel/printk/printk_ringbuffer.c:1096
 prb_reserve+0x808/0xaf0 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x56d/0x860 kernel/printk/printk.c:2326
 vprintk_emit+0x178/0x650 kernel/printk/printk.c:2426
 vprintk_deferred kernel/printk/printk.c:4602 [inline]
 _printk_deferred+0x82/0xb0 kernel/printk/printk.c:4611
 ___ratelimit+0x4b1/0x4f0 lib/ratelimit.c:86
 __printk_ratelimit+0x1c/0x30 kernel/printk/printk.c:4627
 kauditd_printk_skb kernel/audit.c:545 [inline]
 kauditd_hold_skb+0x63/0x1c0 kernel/audit.c:581
 kauditd_send_queue+0x273/0x2c0 kernel/audit.c:766
 kauditd_thread+0x421/0x630 kernel/audit.c:890
 kthread+0x486/0x510 kernel/kthread.c:464
 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffffffff86889d38 of 8 bytes by task 18194 on cpu 0:
 desc_read kernel/printk/printk_ringbuffer.c:482 [inline]
 desc_push_tail kernel/printk/printk_ringbuffer.c:778 [inline]
 desc_reserve kernel/printk/printk_ringbuffer.c:924 [inline]
 prb_reserve+0x221/0xaf0 kernel/printk/printk_ringbuffer.c:1619
 vprintk_store+0x56d/0x860 kernel/printk/printk.c:2326
 vprintk_emit+0x178/0x650 kernel/printk/printk.c:2426
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2465
 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82
 _printk+0x79/0xa0 kernel/printk/printk.c:2475
 sidtab_context_to_sid+0x5bf/0x5e0 security/selinux/ss/sidtab.c:348
 security_context_to_sid_core+0x294/0x3b0 security/selinux/ss/services.c:1588
 security_context_to_sid_force+0x30/0x40 security/selinux/ss/services.c:1661
 selinux_inode_setxattr+0x4e8/0x6e0 security/selinux/hooks.c:3372
 security_inode_setxattr+0x13a/0x1b0 security/security.c:2422
 __vfs_setxattr_locked+0x83/0x1d0 fs/xattr.c:286
 vfs_setxattr+0x132/0x270 fs/xattr.c:321
 do_setxattr fs/xattr.c:636 [inline]
 file_setxattr+0x139/0x1b0 fs/xattr.c:646
 path_setxattrat+0x290/0x310 fs/xattr.c:711
 __do_sys_fsetxattr fs/xattr.c:761 [inline]
 __se_sys_fsetxattr fs/xattr.c:758 [inline]
 __x64_sys_fsetxattr+0x6b/0x80 fs/xattr.c:758
 x64_sys_call+0x2f7c/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:191
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000000316c0 -> 0x00000000000d3a00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 18194 Comm:  Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
==================================================================
SELinux:  Context system_u:object_r:semanage_exec_t:s0 is not valid (left unmapped).