EXT4-fs error (device loop5): ext4_dirty_inode:6459: inode #19: comm +}[@: mark_inode_dirty error
EXT4-fs error (device loop5): ext4_do_update_inode:5568: inode #19: comm +}[@: corrupted inode contents
EXT4-fs error (device loop5): ext4_xattr_delete_inode:2991: inode #19: comm +}[@: mark_inode_dirty error
EXT4-fs error (device loop5): ext4_xattr_delete_inode:2994: inode #19: comm +}[@: mark inode dirty (error -117)
==================================================================
BUG: KCSAN: data-race in _prb_read_valid / data_alloc

write to 0xffffffff86894c98 of 8 bytes by task 18477 on cpu 0:
 data_alloc+0x271/0x2b0 kernel/printk/printk_ringbuffer.c:1095
 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
 __ext4_iget+0xfb4/0x21c0 fs/ext4/inode.c:-1
 ext4_lookup+0x161/0x390 fs/ext4/namei.c:1787
 lookup_one_qstr_excl_raw+0xc4/0x1b0 fs/namei.c:1689
 lookup_one_qstr_excl fs/namei.c:1711 [inline]
 filename_create+0x14a/0x290 fs/namei.c:4140
 do_mkdirat+0x52/0x3f0 fs/namei.c:4391
 __do_sys_mkdir fs/namei.c:4421 [inline]
 __se_sys_mkdir fs/namei.c:4419 [inline]
 __x64_sys_mkdir+0x42/0x50 fs/namei.c:4419
 x64_sys_call+0x2289/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:84
 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 0xffffffff86894c98 of 16 bytes by task 18470 on cpu 1:
 desc_read kernel/printk/printk_ringbuffer.c:482 [inline]
 desc_read_finalized_seq kernel/printk/printk_ringbuffer.c:1874 [inline]
 prb_read kernel/printk/printk_ringbuffer.c:1922 [inline]
 _prb_read_valid+0x1bc/0x920 kernel/printk/printk_ringbuffer.c:2113
 prb_read_valid+0x3c/0x60 kernel/printk/printk_ringbuffer.c:2185
 printk_get_next_message+0xc8/0x510 kernel/printk/printk.c:3005
 console_emit_next_record kernel/printk/printk.c:3092 [inline]
 console_flush_all+0x290/0x730 kernel/printk/printk.c:3226
 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
 console_unlock+0xa1/0x330 kernel/printk/printk.c:3325
 vprintk_emit+0x388/0x650 kernel/printk/printk.c:2450
 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
 ext4_xattr_delete_inode+0x756/0x790 fs/ext4/xattr.c:2993
 ext4_evict_inode+0xa5c/0xd80 fs/ext4/inode.c:271
 evict+0x2e3/0x550 fs/inode.c:810
 iput_final fs/inode.c:1898 [inline]
 iput+0x447/0x5b0 fs/inode.c:1924
 ext4_ext_migrate+0x8fe/0x9b0 fs/ext4/migrate.c:588
 __ext4_ioctl fs/ext4/ioctl.c:1402 [inline]
 ext4_ioctl+0xf78/0x2080 fs/ext4/ioctl.c:1626
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xce/0x140 fs/ioctl.c:893
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:893
 x64_sys_call+0x19a8/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:17
 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

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 18470 Comm: +}[@ Not tainted 6.16.0-rc1-syzkaller-00003-gf09079bd04a9 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
==================================================================
EXT4-fs warning (device loop5): ext4_evict_inode:274: xattr delete (err -117)