SELinux: inode_doinit_use_xattr:  getxattr returned 117 for dev=loop0 ino=15
EXT4-fs error (device loop0): ext4_xattr_block_get:593: inode #15: comm syz.0.7428: corrupted xattr block 19: overlapping e_value 
==================================================================
BUG: KCSAN: data-race in data_push_tail / string

write to 0xffffffff88e607a0 of 1 bytes by task 4369 on cpu 1:
 string_nocheck lib/vsprintf.c:643 [inline]
 string+0x187/0x220 lib/vsprintf.c:721
 vsnprintf+0x532/0x890 lib/vsprintf.c:2874
 vscnprintf+0x41/0x90 lib/vsprintf.c:2939
 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2216
 vprintk_store+0x599/0x860 kernel/printk/printk.c:2336
 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
 __ext4_error_inode+0x2ca/0x3f0 fs/ext4/super.c:844
 check_xattrs+0x25e/0x7d0 fs/ext4/xattr.c:289
 __ext4_xattr_check_block fs/ext4/xattr.c:303 [inline]
 ext4_xattr_block_get fs/ext4/xattr.c:593 [inline]
 ext4_xattr_get+0x1ed/0x470 fs/ext4/xattr.c:708
 ext4_xattr_security_get+0x32/0x40 fs/ext4/xattr_security.c:20
 __vfs_getxattr+0x2ad/0x2c0 fs/xattr.c:423
 inode_doinit_use_xattr+0x7a/0x2d0 security/selinux/hooks.c:1371
 inode_doinit_with_dentry+0x596/0x7a0 security/selinux/hooks.c:1496
 __inode_security_revalidate security/selinux/hooks.c:296 [inline]
 inode_security_rcu security/selinux/hooks.c:314 [inline]
 selinux_inode_permission+0xff/0x620 security/selinux/hooks.c:3210
 security_inode_permission+0x6d/0xb0 security/security.c:2324
 inode_permission+0x106/0x310 fs/namei.c:601
 vfs_truncate+0xb4/0x220 fs/open.c:88
 do_sys_truncate+0x91/0x130 fs/open.c:141
 __do_sys_truncate fs/open.c:153 [inline]
 __se_sys_truncate fs/open.c:151 [inline]
 __x64_sys_truncate+0x31/0x40 fs/open.c:151
 x64_sys_call+0x2920/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:77
 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

read to 0xffffffff88e607a0 of 8 bytes by task 4354 on cpu 0:
 data_make_reusable kernel/printk/printk_ringbuffer.c:594 [inline]
 data_push_tail+0xfd/0x420 kernel/printk/printk_ringbuffer.c:679
 data_alloc+0xbf/0x2b0 kernel/printk/printk_ringbuffer.c:1054
 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_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
 __ext4_error_inode+0x2ca/0x3f0 fs/ext4/super.c:844
 check_xattrs+0x25e/0x7d0 fs/ext4/xattr.c:289
 __ext4_xattr_check_block fs/ext4/xattr.c:303 [inline]
 ext4_xattr_block_get fs/ext4/xattr.c:593 [inline]
 ext4_xattr_get+0x1ed/0x470 fs/ext4/xattr.c:708
 ext4_xattr_security_get+0x32/0x40 fs/ext4/xattr_security.c:20
 __vfs_getxattr+0x2ad/0x2c0 fs/xattr.c:423
 inode_doinit_use_xattr+0x7a/0x2d0 security/selinux/hooks.c:1371
 inode_doinit_with_dentry+0x596/0x7a0 security/selinux/hooks.c:1496
 __inode_security_revalidate security/selinux/hooks.c:296 [inline]
 dentry_has_perm security/selinux/hooks.c:1699 [inline]
 selinux_inode_setattr+0x1fb/0x4e0 security/selinux/hooks.c:3264
 security_inode_setattr+0x88/0xd0 security/security.c:2345
 notify_change+0x723/0x890 fs/attr.c:536
 chmod_common+0x138/0x270 fs/open.c:649
 do_fchmodat+0xcd/0x180 fs/open.c:696
 __do_sys_chmod fs/open.c:720 [inline]
 __se_sys_chmod fs/open.c:718 [inline]
 __x64_sys_chmod+0x38/0x50 fs/open.c:718
 x64_sys_call+0x1529/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:91
 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: 0x00000001000031be -> 0x6b636f6c625f7274

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4354 Comm: syz.0.7428 Tainted: G        W           6.16.0-rc5-syzkaller-00053-g8c2e52ebbe88 #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
==================================================================
SELinux: inode_doinit_use_xattr:  getxattr returned 117 for dev=loop0 ino=15
EXT4-fs error (device loop0): ext4_xattr_block_get:593: inode #15: comm syz.0.7428: corrupted xattr block 19: overlapping e_value