udevd[20919]: symlink '../../loop6' '/dev/disk/by-diskseq/2465.tmp-b7:6' failed: Read-only file system
udevd[20919]: symlink '../../loop6' '/dev/disk/by-diskseq/2465.tmp-b7:6' failed: Read-only file system
==================================================================
BUG: KCSAN: data-race in console_flush_all / console_flush_all

write to 0xffffffff870361b8 of 8 bytes by task 20488 on cpu 0:
 console_emit_next_record kernel/printk/printk.c:3144 [inline]
 console_flush_one_record kernel/printk/printk.c:3269 [inline]
 console_flush_all+0x38c/0x6c0 kernel/printk/printk.c:3343
 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
 console_unlock+0xa1/0x280 kernel/printk/printk.c:3413
 vprintk_emit+0x3e4/0x600 kernel/printk/printk.c:2479
 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
 caif_disconnect_client+0x13d/0x150 net/caif/cfcnfg.c:194
 caif_release+0xec/0x250 net/caif/caif_socket.c:918
 __sock_release net/socket.c:722 [inline]
 sock_close+0x6b/0x150 net/socket.c:1514
 __fput+0x29b/0x630 fs/file_table.c:510
 fput_close_sync+0xad/0x190 fs/file_table.c:615
 __do_sys_close fs/open.c:1507 [inline]
 __se_sys_close fs/open.c:1492 [inline]
 __x64_sys_close+0x55/0xf0 fs/open.c:1492
 x64_sys_call+0x275d/0x3020 arch/x86/include/generated/asm/syscalls_64.h:4
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff870361b8 of 8 bytes by task 20919 on cpu 1:
 console_flush_one_record kernel/printk/printk.c:3270 [inline]
 console_flush_all+0x548/0x6c0 kernel/printk/printk.c:3343
 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
 console_unlock+0xa1/0x280 kernel/printk/printk.c:3413
 vprintk_emit+0x3e4/0x600 kernel/printk/printk.c:2479
 devkmsg_emit+0x7f/0xb0 kernel/printk/printk.c:733
 devkmsg_write+0x1e2/0x2b0 kernel/printk/printk.c:796
 do_iter_readv_writev+0x4fd/0x5a0 fs/read_write.c:-1
 vfs_writev+0x2e1/0x900 fs/read_write.c:1059
 do_writev+0xe9/0x210 fs/read_write.c:1105
 __do_sys_writev fs/read_write.c:1173 [inline]
 __se_sys_writev fs/read_write.c:1170 [inline]
 __x64_sys_writev+0x45/0x50 fs/read_write.c:1170
 x64_sys_call+0x1c0c/0x3020 arch/x86/include/generated/asm/syscalls_64.h:21
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000000039f7 -> 0x00000000000039f8

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 20919 Comm: udevd Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
==================================================================
udevd[20919]: symlink '../../loop1' '/dev/disk/by-diskseq/2447.tmp-b7:1' failed: Read-only file system