SELinux: inode_doinit_use_xattr:  getxattr returned 5 for dev=loop4 ino=15
SELinux: inode_doinit_use_xattr:  getxattr returned 5 for dev=loop4 ino=15
==================================================================
BUG: KCSAN: data-race in _prb_read_valid / data_alloc

write to 0xffffffff86a8f6c8 of 8 bytes by task 26291 on cpu 1:
 data_alloc+0x310/0x390 kernel/printk/printk_ringbuffer.c:1129
 prb_reserve+0x8d7/0xae0 kernel/printk/printk_ringbuffer.c:1724
 vprintk_store+0x54a/0x910 kernel/printk/printk.c:2354
 vprintk_emit+0x1a4/0x600 kernel/printk/printk.c:2455
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2494
 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82
 _printk+0x79/0xa0 kernel/printk/printk.c:2504
 _fat_msg+0xb0/0xe0 fs/fat/misc.c:62
 __fat_fs_error+0x1b3/0x1e0 fs/fat/misc.c:39
 fat_get_cluster+0x7fa/0x820 fs/fat/cache.c:-1
 fat_bmap_cluster fs/fat/cache.c:294 [inline]
 fat_get_mapped_cluster+0xe4/0x240 fs/fat/cache.c:315
 fat_bmap+0x254/0x280 fs/fat/cache.c:379
 __fat_get_block fs/fat/inode.c:129 [inline]
 fat_get_block+0xd3/0x5e0 fs/fat/inode.c:190
 do_mpage_readpage+0x40b/0xe00 fs/mpage.c:222
 mpage_readahead+0x1c4/0x2e0 fs/mpage.c:371
 fat_readahead+0x1c/0x30 fs/fat/inode.c:210
 read_pages+0xa3/0x480 mm/readahead.c:163
 page_cache_ra_unbounded+0x34f/0x440 mm/readahead.c:302
 do_page_cache_ra mm/readahead.c:332 [inline]
 page_cache_ra_order+0x145/0x220 mm/readahead.c:535
 do_sync_mmap_readahead+0x33d/0x350 mm/filemap.c:3400
 filemap_fault+0x362/0xbb0 mm/filemap.c:3549
 __do_fault+0xbc/0x200 mm/memory.c:5323
 do_read_fault mm/memory.c:5758 [inline]
 do_fault mm/memory.c:5892 [inline]
 do_pte_missing mm/memory.c:4404 [inline]
 handle_pte_fault mm/memory.c:6276 [inline]
 __handle_mm_fault mm/memory.c:6414 [inline]
 handle_mm_fault+0x11d7/0x3030 mm/memory.c:6583
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x1023/0x1ea0 mm/gup.c:1428
 populate_vma_page_range mm/gup.c:1860 [inline]
 __mm_populate+0x242/0x390 mm/gup.c:1963
 mm_populate include/linux/mm.h:3683 [inline]
 vm_mmap_pgoff+0x23b/0x2d0 mm/util.c:586
 ksys_mmap_pgoff+0x267/0x310 mm/mmap.c:604
 x64_sys_call+0x14df/0x3020 arch/x86/include/generated/asm/syscalls_64.h:10
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff86a8f6c8 of 16 bytes by task 26277 on cpu 0:
 desc_read kernel/printk/printk_ringbuffer.c:496 [inline]
 desc_read_finalized_seq kernel/printk/printk_ringbuffer.c:1931 [inline]
 prb_read kernel/printk/printk_ringbuffer.c:1979 [inline]
 _prb_read_valid+0x1bc/0x950 kernel/printk/printk_ringbuffer.c:2170
 desc_update_last_finalized+0x8f/0x170 kernel/printk/printk_ringbuffer.c:1570
 prb_final_commit+0x10d/0x150 kernel/printk/printk_ringbuffer.c:1839
 vprintk_store+0x88b/0x910 kernel/printk/printk.c:2381
 vprintk_emit+0x1a4/0x600 kernel/printk/printk.c:2455
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2494
 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82
 _printk+0x79/0xa0 kernel/printk/printk.c:2504
 inode_doinit_use_xattr+0x29e/0x2d0 security/selinux/hooks.c:1403
 inode_doinit_with_dentry+0x595/0x7a0 security/selinux/hooks.c:1507
 __inode_security_revalidate security/selinux/hooks.c:298 [inline]
 inode_security_rcu security/selinux/hooks.c:316 [inline]
 selinux_inode_permission+0x22e/0x7d0 security/selinux/hooks.c:3243
 security_inode_permission+0x69/0xa0 security/security.c:1816
 inode_permission+0x288/0x3b0 fs/namei.c:656
 may_open+0x255/0x350 fs/namei.c:4248
 do_open fs/namei.c:4669 [inline]
 path_openat+0x1a59/0x2050 fs/namei.c:4830
 do_file_open+0x16c/0x290 fs/namei.c:4859
 do_sys_openat2+0x94/0x130 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1383
 x64_sys_call+0x1e39/0x3020 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 26277 Comm: syz.4.30171 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
==================================================================
SELinux: inode_doinit_use_xattr:  getxattr returned 5 for dev=loop4 ino=15