loop0: detected capacity change from 0 to 1024
EXT4-fs: Ignoring removed nomblk_io_submit option
==================================================================
BUG: KCSAN: data-race in __find_get_block / has_bh_in_lru

read-write to 0xffff888237d2b990 of 8 bytes by task 4070 on cpu 1:
 bh_lru_install fs/buffer.c:1340 [inline]
 __find_get_block+0x438/0x8c0 fs/buffer.c:1403
 bdev_getblk+0x34/0x420 fs/buffer.c:1423
 __getblk include/linux/buffer_head.h:355 [inline]
 sb_getblk include/linux/buffer_head.h:361 [inline]
 ext4_getblk+0x1c1/0x510 fs/ext4/inode.c:843
 ext4_bread_batch+0x5b/0x360 fs/ext4/inode.c:910
 __ext4_find_entry+0x9d3/0x10a0 fs/ext4/namei.c:1670
 ext4_lookup_entry fs/ext4/namei.c:1770 [inline]
 ext4_lookup+0xba/0x390 fs/ext4/namei.c:1838
 lookup_one_qstr_excl+0xc7/0x1a0 fs/namei.c:1607
 filename_create+0x14d/0x2b0 fs/namei.c:3893
 do_symlinkat+0x84/0x350 fs/namei.c:4500
 __do_sys_symlinkat fs/namei.c:4523 [inline]
 __se_sys_symlinkat fs/namei.c:4520 [inline]
 __x64_sys_symlinkat+0x62/0x70 fs/namei.c:4520
 x64_sys_call+0x2a2d/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:267
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888237d2b990 of 8 bytes by task 4069 on cpu 0:
 has_bh_in_lru+0x35/0x1f0 fs/buffer.c:1510
 smp_call_function_many_cond+0x2f6/0xc50 kernel/smp.c:808
 on_each_cpu_cond_mask+0x3c/0x90 kernel/smp.c:1023
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x2a/0x30 fs/buffer.c:1519
 kill_bdev block/bdev.c:84 [inline]
 set_blocksize+0x260/0x290 block/bdev.c:161
 sb_set_blocksize block/bdev.c:170 [inline]
 sb_min_blocksize+0x83/0x110 block/bdev.c:186
 ext4_load_super fs/ext4/super.c:5025 [inline]
 __ext4_fill_super fs/ext4/super.c:5222 [inline]
 ext4_fill_super+0x39f/0x39d0 fs/ext4/super.c:5699
 get_tree_bdev+0x253/0x2e0 fs/super.c:1614
 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5731
 vfs_get_tree+0x56/0x1d0 fs/super.c:1779
 do_new_mount+0x227/0x690 fs/namespace.c:3352
 path_mount+0x49b/0xb30 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3875
 __x64_sys_mount+0x67/0x80 fs/namespace.c:3875
 x64_sys_call+0x2591/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000000000 -> 0xffff8881004a54e0

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 4069 Comm: syz-executor.0 Not tainted 6.9.0-rc3-syzkaller-00208-g586b5dfb51b9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
==================================================================
EXT4-fs: Quota format mount options ignored when QUOTA feature is enabled
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.