loop3: detected capacity change from 0 to 1024 EXT4-fs: Ignoring removed bh option EXT4-fs: inline encryption not supported EXT4-fs (loop3): stripe (65535) is not aligned with cluster size (4096), stripe is disabled ================================================================== BUG: KCSAN: data-race in console_flush_all / console_flush_all write to 0xffffffff86a20c48 of 8 bytes by task 7348 on cpu 1: console_emit_next_record kernel/printk/printk.c:3099 [inline] console_flush_all+0x35a/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 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:649 [inline] sock_close+0x68/0x150 net/socket.c:1439 __fput+0x298/0x650 fs/file_table.c:468 ____fput+0x1c/0x30 fs/file_table.c:496 task_work_run+0x12e/0x1a0 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xe4/0x100 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x1d6/0x200 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff86a20c48 of 8 bytes by task 7352 on cpu 0: console_flush_all+0x563/0x730 kernel/printk/printk.c:3227 __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_msg+0x18f/0x1a0 fs/ext4/super.c:981 __ext4_fill_super fs/ext4/super.c:5359 [inline] ext4_fill_super+0x1eaf/0x35d0 fs/ext4/super.c:5728 get_tree_bdev_flags+0x291/0x300 fs/super.c:1692 get_tree_bdev+0x1f/0x30 fs/super.c:1715 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5760 vfs_get_tree+0x54/0x1d0 fs/super.c:1815 do_new_mount+0x207/0x5e0 fs/namespace.c:3808 path_mount+0x4a4/0xb20 fs/namespace.c:4123 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount+0x28f/0x2e0 fs/namespace.c:4324 __x64_sys_mount+0x67/0x80 fs/namespace.c:4324 x64_sys_call+0x2b4d/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:166 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: 0x000000000000151b -> 0x000000000000151c Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 7352 Comm: syz.3.1219 Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 ================================================================== [EXT4 FS bs=1024, gc=1, bpg=131072, ipg=32, mo=c84ce018, mo2=0000] EXT4-fs error (device loop3): ext4_map_blocks:778: inode #3: block 2: comm syz.3.1219: lblock 2 mapped to illegal pblock 2 (length 1) EXT4-fs error (device loop3): ext4_map_blocks:778: inode #3: block 48: comm syz.3.1219: lblock 0 mapped to illegal pblock 48 (length 1) EXT4-fs error (device loop3): ext4_acquire_dquot:6937: comm syz.3.1219: Failed to acquire dquot type 0 EXT4-fs error (device loop3) in ext4_reserve_inode_write:6334: Corrupt filesystem EXT4-fs error (device loop3): ext4_evict_inode:254: inode #11: comm syz.3.1219: mark_inode_dirty error EXT4-fs warning (device loop3): ext4_evict_inode:257: couldn't mark inode dirty (err -117) EXT4-fs (loop3): 1 orphan inode deleted EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. EXT4-fs error (device loop3): ext4_map_blocks:778: inode #3: block 48: comm syz.3.1219: lblock 0 mapped to illegal pblock 48 (length 1)