==================================================================
BUG: KCSAN: data-race in data_push_tail / string

write to 0xffffffff88b86430 of 1 bytes by task 9 on cpu 0:
 string_nocheck lib/vsprintf.c:650 [inline]
 string+0x16c/0x210 lib/vsprintf.c:728
 vsnprintf+0xa09/0xe30 lib/vsprintf.c:2824
 vscnprintf+0x42/0x90 lib/vsprintf.c:2930
 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2165
 vprintk_store+0x570/0x810 kernel/printk/printk.c:2279
 vprintk_emit+0x13a/0x610 kernel/printk/printk.c:2329
 dev_vprintk_emit+0x1df/0x210 drivers/base/core.c:4912
 dev_printk_emit+0x82/0xb0 drivers/base/core.c:4923
 __dev_printk+0xf6/0x110 drivers/base/core.c:4935
 _dev_warn+0x99/0xc0 drivers/base/core.c:4979
 hid_parser_main+0x622/0x680 drivers/hid/hid-core.c:632
 hid_open_report+0x4e6/0x800 drivers/hid/hid-core.c:1276
 hid_parse include/linux/hid.h:1118 [inline]
 hid_generic_probe+0x33/0x70 drivers/hid/hid-generic.c:63
 __hid_device_probe drivers/hid/hid-core.c:2674 [inline]
 hid_device_probe+0x220/0x370 drivers/hid/hid-core.c:2711
 really_probe+0x1cf/0x5d0 drivers/base/dd.c:657
 __driver_probe_device+0x12d/0x200 drivers/base/dd.c:799
 driver_probe_device+0x38/0x2f0 drivers/base/dd.c:829
 __device_attach_driver+0x216/0x320 drivers/base/dd.c:957
 bus_for_each_drv+0x1cd/0x240 drivers/base/bus.c:457
 __device_attach+0x1c7/0x290 drivers/base/dd.c:1029
 device_initial_probe+0x1a/0x20 drivers/base/dd.c:1078
 bus_probe_device+0x141/0x1d0 drivers/base/bus.c:532
 device_add+0x5e2/0x790 drivers/base/core.c:3682
 hid_add_device+0x26e/0x2f0 drivers/hid/hid-core.c:2857
 uhid_device_add_worker+0x2b/0xa0 drivers/hid/uhid.c:73
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3312
 worker_thread+0x526/0x6e0 kernel/workqueue.c:3389
 kthread+0x1d1/0x210 kernel/kthread.c:389
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read to 0xffffffff88b86430 of 8 bytes by task 6804 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_alloc+0xbe/0x2c0 kernel/printk/printk_ringbuffer.c:1054
 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669
 vprintk_store+0x53f/0x810 kernel/printk/printk.c:2269
 vprintk_emit+0x13a/0x610 kernel/printk/printk.c:2329
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2363
 vprintk+0x75/0x80 kernel/printk/printk_safe.c:45
 _printk+0x7a/0xa0 kernel/printk/printk.c:2373
 __ext4_error+0x221/0x310 fs/ext4/super.c:822
 ext4_free_blocks+0x125f/0x14b0
 ext4_remove_blocks fs/ext4/extents.c:2503 [inline]
 ext4_ext_rm_leaf fs/ext4/extents.c:2686 [inline]
 ext4_ext_remove_space+0x166e/0x2a90 fs/ext4/extents.c:2934
 ext4_ext_truncate+0xc4/0x150 fs/ext4/extents.c:4441
 ext4_truncate+0x773/0xb10 fs/ext4/inode.c:4218
 ext4_evict_inode+0x8b4/0xdd0 fs/ext4/inode.c:258
 evict+0x2d7/0x570 fs/inode.c:704
 iput_final fs/inode.c:1838 [inline]
 iput+0x432/0x5c0 fs/inode.c:1864
 ext4_process_orphan+0x1a9/0x1c0 fs/ext4/orphan.c:360
 ext4_orphan_cleanup+0x696/0x9e0 fs/ext4/orphan.c:474
 __ext4_fill_super fs/ext4/super.c:5541 [inline]
 ext4_fill_super+0x367a/0x39e0 fs/ext4/super.c:5664
 get_tree_bdev+0x256/0x2e0 fs/super.c:1635
 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5696
 vfs_get_tree+0x56/0x1e0 fs/super.c:1800
 do_new_mount+0x227/0x690 fs/namespace.c:3472
 path_mount+0x49b/0xb30 fs/namespace.c:3799
 do_mount fs/namespace.c:3812 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount+0x27c/0x2d0 fs/namespace.c:3997
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3997
 x64_sys_call+0x203e/0x2d60 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: 0x00000000ffffe92a -> 0x656e65672d646968

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 6804 Comm: syz.2.1283 Not tainted 6.11.0-rc6-syzkaller-00070-gc763c4339688 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
==================================================================
EXT4-fs error (device loop2): ext4_read_inode_bitmap:140: comm syz.2.1283: Invalid inode bitmap blk 0 in block_group 0
EXT4-fs error (device loop2) in ext4_free_inode:362: Corrupt filesystem
EXT4-fs (loop2): 1 orphan inode deleted