================================================================== BUG: KCSAN: data-race in data_push_tail / number write to 0xffffffff86ed32bc of 1 bytes by task 9157 on cpu 0: number+0x7d0/0xa90 lib/vsprintf.c:563 vsnprintf+0xa44/0xe20 lib/vsprintf.c:2884 vscnprintf+0x42/0x80 lib/vsprintf.c:2924 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2128 vprintk_store+0x56f/0x800 kernel/printk/printk.c:2242 vprintk_emit+0xd0/0x5d0 kernel/printk/printk.c:2288 vprintk_default+0x26/0x30 kernel/printk/printk.c:2322 vprintk+0x71/0x80 kernel/printk/printk_safe.c:45 _printk+0x7a/0xa0 kernel/printk/printk.c:2332 __ext4_error_inode+0x306/0x400 fs/ext4/super.c:856 ext4_map_blocks+0xc6a/0xf60 ext4_iomap_begin+0x1b2/0x5d0 fs/ext4/inode.c:3356 iomap_iter+0x401/0x820 fs/iomap/iter.c:91 __iomap_dio_rw+0x6ba/0x1080 fs/iomap/direct-io.c:658 iomap_dio_rw+0x40/0x90 fs/iomap/direct-io.c:748 ext4_dio_write_iter fs/ext4/file.c:605 [inline] ext4_file_write_iter+0xaaa/0x1200 fs/ext4/file.c:715 do_iter_write+0x4b4/0x7b0 fs/read_write.c:860 vfs_writev+0x1a8/0x320 fs/read_write.c:933 do_writev+0xf8/0x220 fs/read_write.c:976 __do_sys_writev fs/read_write.c:1049 [inline] __se_sys_writev fs/read_write.c:1046 [inline] __x64_sys_writev+0x45/0x50 fs/read_write.c:1046 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffffffff86ed32b8 of 8 bytes by task 3118 on cpu 1: data_make_reusable kernel/printk/printk_ringbuffer.c:590 [inline] data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:675 data_alloc+0xbe/0x2c0 kernel/printk/printk_ringbuffer.c:1046 prb_reserve+0x893/0xbc0 kernel/printk/printk_ringbuffer.c:1555 vprintk_store+0x53e/0x800 kernel/printk/printk.c:2232 vprintk_emit+0xd0/0x5d0 kernel/printk/printk.c:2288 vprintk_default+0x26/0x30 kernel/printk/printk.c:2322 vprintk+0x71/0x80 kernel/printk/printk_safe.c:45 _printk+0x7a/0xa0 kernel/printk/printk.c:2332 __ext4_std_error+0x34a/0x360 fs/ext4/super.c:973 ext4_reserve_inode_write+0x1bd/0x200 fs/ext4/inode.c:5752 __ext4_mark_inode_dirty+0x8e/0x440 fs/ext4/inode.c:5919 ext4_quota_off+0x244/0x280 fs/ext4/super.c:7131 ext4_quotas_off fs/ext4/super.c:1192 [inline] ext4_put_super+0xc7/0x7d0 fs/ext4/super.c:1307 generic_shutdown_super+0xdb/0x210 fs/super.c:693 kill_block_super+0x2a/0x60 fs/super.c:1646 ext4_kill_sb+0x44/0x80 fs/ext4/super.c:7305 deactivate_locked_super+0x73/0x1c0 fs/super.c:481 deactivate_super+0x9b/0xb0 fs/super.c:514 cleanup_mnt+0x272/0x2e0 fs/namespace.c:1254 __cleanup_mnt+0x19/0x20 fs/namespace.c:1261 task_work_run+0x135/0x1a0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd6/0xe0 kernel/entry/common.c:171 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x0000000100004bdd -> 0x0000000123206564 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 3118 Comm: syz-executor.4 Not tainted 6.6.0-rc2-syzkaller-00414-g8a511e7efc5a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 ================================================================== EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem EXT4-fs error (device loop4): ext4_quota_off:7131: inode #3: comm syz-executor.4: mark_inode_dirty error EXT4-fs error (device loop4) in ext4_reserve_inode_write:5752: Corrupt filesystem