EXT4-fs: Ignoring removed bh option
EXT4-fs: Ignoring removed nobh option
==================================================================
BUG: KCSAN: data-race in data_push_tail / number

write to 0xffffffff86f2cf7b of 1 bytes by task 28446 on cpu 1:
 number+0x7d0/0xa90 lib/vsprintf.c:562
 vsnprintf+0xa44/0xe20 lib/vsprintf.c:2862
 va_format lib/vsprintf.c:1681 [inline]
 pointer+0x8a1/0xd10 lib/vsprintf.c:2427
 vsnprintf+0x861/0xe20 lib/vsprintf.c:2800
 vscnprintf+0x42/0x80 lib/vsprintf.c:2902
 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2126
 vprintk_store+0x56f/0x800 kernel/printk/printk.c:2240
 vprintk_emit+0xd0/0x430 kernel/printk/printk.c:2286
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2316
 vprintk+0x83/0x90 kernel/printk/printk_safe.c:50
 _printk+0x7a/0xa0 kernel/printk/printk.c:2326
 __ext4_msg+0x18a/0x1a0 fs/ext4/super.c:937
 ext4_orphan_cleanup+0x900/0x9c0 fs/ext4/orphan.c:497
 __ext4_fill_super fs/ext4/super.c:5547 [inline]
 ext4_fill_super+0x35d4/0x3890 fs/ext4/super.c:5663
 get_tree_bdev+0x2b1/0x3a0 fs/super.c:1303
 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5694
 vfs_get_tree+0x51/0x190 fs/super.c:1510
 do_new_mount+0x200/0x650 fs/namespace.c:3039
 path_mount+0x498/0xb40 fs/namespace.c:3369
 do_mount fs/namespace.c:3382 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3568
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3568
 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 0xffffffff86f2cf78 of 8 bytes by task 28452 on cpu 0:
 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:2230
 vprintk_emit+0xd0/0x430 kernel/printk/printk.c:2286
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2316
 vprintk+0x83/0x90 kernel/printk/printk_safe.c:50
 _printk+0x7a/0xa0 kernel/printk/printk.c:2326
 __ext4_msg+0x130/0x1a0 fs/ext4/super.c:939
 ext4_parse_param+0x88f/0x1050 fs/ext4/super.c:2173
 vfs_parse_fs_param+0x136/0x290 fs/fs_context.c:146
 vfs_parse_fs_string fs/fs_context.c:184 [inline]
 generic_parse_monolithic+0x165/0x1d0 fs/fs_context.c:224
 parse_monolithic_mount_data+0x42/0x50 fs/fs_context.c:667
 do_new_mount+0x1d3/0x650 fs/namespace.c:3035
 path_mount+0x498/0xb40 fs/namespace.c:3369
 do_mount fs/namespace.c:3382 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3568
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3568
 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

value changed: 0x0000000100037fce -> 0x636e757274203120

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 28452 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller-05127-g5c7ecada25d2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
==================================================================
EXT4-fs: Ignoring removed mblk_io_submit option
EXT4-fs: Ignoring removed nobh option
[EXT4 FS bs=1024, gc=1, bpg=8192, ipg=32, mo=a802c018, mo2=0002]
System zones: 
1-12

EXT4-fs (loop1): orphan cleanup on readonly fs
EXT4-fs (loop1): 1 truncate cleaned up
EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: writeback.