[EXT4 FS bs=1024, gc=1, bpg=131072, ipg=32, mo=e840e118, mo2=0000]
System zones: 0-1
==================================================================
BUG: KCSAN: data-race in data_alloc / data_push_tail

write to 0xffffffff88ba10c8 of 8 bytes by task 5705 on cpu 0:
 data_alloc+0x216/0x2c0 kernel/printk/printk_ringbuffer.c:1082
 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x558/0x870 kernel/printk/printk.c:2326
 vprintk_emit+0x15e/0x680 kernel/printk/printk.c:2408
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2447
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:86
 _printk+0x7a/0xa0 kernel/printk/printk.c:2457
 __ext4_error+0x221/0x310 fs/ext4/super.c:830
 ext4_acquire_dquot+0x1d3/0x210 fs/ext4/super.c:6936
 dqget+0x522/0x8b0 fs/quota/dquot.c:977
 __dquot_initialize+0x194/0x760 fs/quota/dquot.c:1505
 dquot_initialize+0x1a/0x20 fs/quota/dquot.c:1567
 ext4_create+0x4b/0x2f0 fs/ext4/namei.c:2834
 lookup_open fs/namei.c:3649 [inline]
 open_last_lookups fs/namei.c:3748 [inline]
 path_openat+0xe92/0x1fa0 fs/namei.c:3984
 do_filp_open+0x107/0x230 fs/namei.c:4014
 do_sys_openat2+0xab/0x120 fs/open.c:1402
 do_sys_open fs/open.c:1417 [inline]
 __do_sys_openat fs/open.c:1433 [inline]
 __se_sys_openat fs/open.c:1428 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1428
 x64_sys_call+0x2b30/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffffff88ba10c8 of 8 bytes by task 5716 on cpu 1:
 data_make_reusable kernel/printk/printk_ringbuffer.c:594 [inline]
 data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:679
 data_realloc kernel/printk/printk_ringbuffer.c:1143 [inline]
 prb_reserve_in_last+0x773/0xc10 kernel/printk/printk_ringbuffer.c:1440
 vprintk_store+0x47b/0x870 kernel/printk/printk.c:2300
 vprintk_emit+0x15e/0x680 kernel/printk/printk.c:2408
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2447
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:86
 _printk+0x7a/0xa0 kernel/printk/printk.c:2457
 debug_print_tree fs/ext4/block_validity.c:138 [inline]
 ext4_setup_system_zone+0x5a8/0x720 fs/ext4/block_validity.c:265
 __ext4_fill_super fs/ext4/super.c:5536 [inline]
 ext4_fill_super+0x333d/0x3a10 fs/ext4/super.c:5733
 get_tree_bdev_flags+0x29f/0x310 fs/super.c:1636
 get_tree_bdev+0x1f/0x30 fs/super.c:1659
 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5765
 vfs_get_tree+0x56/0x1e0 fs/super.c:1814
 do_new_mount+0x227/0x690 fs/namespace.c:3507
 path_mount+0x49b/0xb30 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x27c/0x2d0 fs/namespace.c:4034
 __x64_sys_mount+0x67/0x80 fs/namespace.c:4034
 x64_sys_call+0x2c84/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000ffffe237 -> 0x00000000ffffee0a

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 5716 Comm: syz.0.342 Tainted: G        W          6.13.0-rc5-syzkaller-00198-g9244696b34f2 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
==================================================================
, 3-12

EXT4-fs error (device loop0): ext4_ext_check_inode:524: inode #11: comm syz.0.342: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 32512(32512)
EXT4-fs error (device loop0): ext4_orphan_get:1394: comm syz.0.342: couldn't read orphan inode 11 (err -117)
EXT4-fs error (device loop0): ext4_read_block_bitmap_nowait:483: comm syz.0.342: Invalid block bitmap block 0 in block_group 0
EXT4-fs error (device loop0): ext4_acquire_dquot:6938: comm syz.0.342: Failed to acquire dquot type 0
EXT4-fs error (device loop0): ext4_read_inode_bitmap:139: comm syz.0.342: Invalid inode bitmap blk 137438953472 in block_group 0