loop2: detected capacity change from 0 to 256
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BUG: KCSAN: data-race in __find_get_block / has_bh_in_lru

read-write to 0xffff888237c2b990 of 8 bytes by task 2746 on cpu 0:
 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]
 jbd2_journal_get_descriptor_buffer+0xdd/0x220 fs/jbd2/journal.c:1010
 jbd2_journal_commit_transaction+0xbf4/0x33d0 fs/jbd2/commit.c:611
 kjournald2+0x243/0x430 fs/jbd2/journal.c:201
 kthread+0x1d1/0x210 kernel/kthread.c:388
 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 0xffff888237c2b990 of 8 bytes by task 18390 on cpu 1:
 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+0x2d/0xb0 block/bdev.c:170
 fat_fill_super+0x1590/0x2880 fs/fat/inode.c:1685
 msdos_fill_super+0x2d/0x40 fs/fat/namei_msdos.c:655
 mount_bdev+0x152/0x1e0 fs/super.c:1658
 msdos_mount+0x31/0x40 fs/fat/namei_msdos.c:662
 legacy_get_tree+0x77/0xd0 fs/fs_context.c:662
 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: 0xffff888106a09a90 -> 0xffff88811dfb3340

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 18390 Comm: syz-executor.2 Tainted: G        W          6.9.0-rc4-syzkaller-00031-g96fca68c4fbf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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