loop3: detected capacity change from 0 to 1024
EXT4-fs (loop3): unsupported inode size: 0
==================================================================
BUG: KCSAN: data-race in data_push_tail / number

write to 0xffffffff86f10073 of 1 bytes by task 13436 on cpu 0:
 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:2137
 vprintk_store+0x56f/0x800 kernel/printk/printk.c:2251
 vprintk_emit+0xd0/0x430 kernel/printk/printk.c:2297
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2327
 vprintk+0x83/0x90 kernel/printk/printk_safe.c:50
 _printk+0x7a/0xa0 kernel/printk/printk.c:2337
 __ext4_msg+0x18a/0x1a0 fs/ext4/super.c:937
 ext4_inode_info_init fs/ext4/super.c:4441 [inline]
 __ext4_fill_super fs/ext4/super.c:5078 [inline]
 ext4_fill_super+0x18db/0x43f0 fs/ext4/super.c:5637
 get_tree_bdev+0x2b1/0x3a0 fs/super.c:1303
 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5668
 vfs_get_tree+0x51/0x190 fs/super.c:1510
 do_new_mount+0x200/0x650 fs/namespace.c:3042
 path_mount+0x498/0xb40 fs/namespace.c:3372
 do_mount fs/namespace.c:3385 [inline]
 __do_sys_mount fs/namespace.c:3594 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3571
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3571
 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 0xffffffff86f10070 of 8 bytes by task 13433 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:2241
 vprintk_emit+0xd0/0x430 kernel/printk/printk.c:2297
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2327
 vprintk+0x83/0x90 kernel/printk/printk_safe.c:50
 _printk+0x7a/0xa0 kernel/printk/printk.c:2337
 __ext4_msg+0x18a/0x1a0 fs/ext4/super.c:937
 ext4_inode_info_init fs/ext4/super.c:4441 [inline]
 __ext4_fill_super fs/ext4/super.c:5078 [inline]
 ext4_fill_super+0x18db/0x43f0 fs/ext4/super.c:5637
 get_tree_bdev+0x2b1/0x3a0 fs/super.c:1303
 ext4_get_tree+0x1c/0x20 fs/ext4/super.c:5668
 vfs_get_tree+0x51/0x190 fs/super.c:1510
 do_new_mount+0x200/0x650 fs/namespace.c:3042
 path_mount+0x498/0xb40 fs/namespace.c:3372
 do_mount fs/namespace.c:3385 [inline]
 __do_sys_mount fs/namespace.c:3594 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3571
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3571
 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: 0x0000000100005dbd -> 0x0000000100203a65

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 13433 Comm: syz-executor.3 Not tainted 6.3.0-rc5-syzkaller-00022-g76f598ba7d8e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
==================================================================
EXT4-fs (loop3): blocksize: 1024