loop5: detected capacity change from 0 to 1024
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BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lru

write to 0xffff888237c28438 of 8 bytes by task 2275 on cpu 0:
 __invalidate_bh_lrus fs/buffer.c:1381 [inline]
 invalidate_bh_lru+0xad/0x110 fs/buffer.c:1393
 smp_call_function_many_cond+0x4ee/0x650 kernel/smp.c:978
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1412
 invalidate_bdev+0x51/0x80 block/bdev.c:85
 invalidate_disk+0x25/0xb0 block/genhd.c:673
 __loop_clr_fd+0x176/0x3c0 drivers/block/loop.c:1164
 loop_clr_fd drivers/block/loop.c:1257 [inline]
 lo_ioctl+0xd8c/0x1290 drivers/block/loop.c:1563
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:614
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888237c28438 of 8 bytes by task 2293 on cpu 1:
 has_bh_in_lru+0x31/0x1c0 fs/buffer.c:1403
 smp_call_function_many_cond+0x2e3/0x650 kernel/smp.c:935
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1155
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1412
 kill_bdev block/bdev.c:75 [inline]
 set_blocksize+0x242/0x270 block/bdev.c:152
 sb_set_blocksize block/bdev.c:161 [inline]
 sb_min_blocksize+0x92/0x110 block/bdev.c:177
 ext4_load_super fs/ext4/super.c:4936 [inline]
 __ext4_fill_super fs/ext4/super.c:5061 [inline]
 ext4_fill_super+0x35c/0x4560 fs/ext4/super.c:5648
 get_tree_bdev+0x2b4/0x3b0 fs/super.c:1323
 ext4_get_tree+0x18/0x20 fs/ext4/super.c:5678
 vfs_get_tree+0x49/0x190 fs/super.c:1530
 do_new_mount+0x200/0x650 fs/namespace.c:3040
 path_mount+0x4aa/0xb70 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x281/0x2d0 fs/namespace.c:3568
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0xffff88810b3b30d0 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 2293 Comm: syz-executor.5 Not tainted 6.0.0-syzkaller-10822-g60bb8154d1d7-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
==================================================================
EXT4-fs (loop5): inodes count not valid: 194848 vs 32