loop0: detected capacity change from 0 to 1764
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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 14365 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]
 sb_getblk include/linux/buffer_head.h:361 [inline]
 ext4_read_inode_bitmap+0x16d/0xc20 fs/ext4/ialloc.c:145
 __ext4_new_inode+0xc16/0x2270 fs/ext4/ialloc.c:1054
 ext4_symlink+0x242/0x5a0 fs/ext4/namei.c:3395
 vfs_symlink+0xca/0x1b0 fs/namei.c:4481
 do_symlinkat+0xe3/0x350 fs/namei.c:4507
 __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
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

read to 0xffff888237c2b990 of 8 bytes by task 14367 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
 invalidate_bdev block/bdev.c:94 [inline]
 bdev_mark_dead+0xea/0x120 block/bdev.c:1170
 disk_force_media_change+0xb6/0xf0 block/disk-events.c:298
 __loop_clr_fd+0x270/0x3f0 drivers/block/loop.c:1170
 loop_clr_fd drivers/block/loop.c:1253 [inline]
 lo_ioctl+0xea6/0x1330 drivers/block/loop.c:1555
 blkdev_ioctl+0x37f/0x470 block/ioctl.c:641
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:904 [inline]
 __se_sys_ioctl+0xd3/0x150 fs/ioctl.c:890
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:890
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

value changed: 0xffff888108916618 -> 0xffff8881004ef478

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 14367 Comm: syz-executor.0 Tainted: G        W          6.9.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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