loop5: detected capacity change from 0 to 4
==================================================================
BUG: KCSAN: data-race in has_bh_in_lru / invalidate_bh_lrus_cpu

write to 0xffff888237c42f10 of 8 bytes by task 6432 on cpu 0:
 __invalidate_bh_lrus fs/buffer.c:1393 [inline]
 invalidate_bh_lrus_cpu+0xad/0xe0 fs/buffer.c:1434
 lru_add_drain_cpu+0x243/0x270 mm/swap.c:645
 lru_add_drain mm/swap.c:724 [inline]
 __pagevec_release+0x57/0xa0 mm/swap.c:989
 pagevec_release include/linux/pagevec.h:81 [inline]
 shmem_undo_range+0x32f/0xe20 mm/shmem.c:931
 shmem_truncate_range mm/shmem.c:1030 [inline]
 shmem_evict_inode+0x11b/0x5a0 mm/shmem.c:1132
 evict+0x1c8/0x3c0 fs/inode.c:586
 iput_final fs/inode.c:1662 [inline]
 iput+0x430/0x580 fs/inode.c:1688
 dentry_unlink_inode+0x273/0x290 fs/dcache.c:376
 __dentry_kill+0x2af/0x4e0 fs/dcache.c:582
 dentry_kill fs/dcache.c:695 [inline]
 dput+0xc6/0x360 fs/dcache.c:888
 do_renameat2+0x59b/0x990 fs/namei.c:4744
 __do_sys_rename fs/namei.c:4788 [inline]
 __se_sys_rename fs/namei.c:4786 [inline]
 __x64_sys_rename+0x58/0x60 fs/namei.c:4786
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888237c42f10 of 8 bytes by task 6429 on cpu 1:
 has_bh_in_lru+0x31/0x1c0 fs/buffer.c:1415
 smp_call_function_many_cond+0x226/0x620 kernel/smp.c:917
 on_each_cpu_cond_mask+0x31/0x40 kernel/smp.c:1135
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1424
 kill_bdev fs/block_dev.c:86 [inline]
 set_blocksize+0x242/0x270 fs/block_dev.c:167
 sb_set_blocksize fs/block_dev.c:176 [inline]
 sb_min_blocksize+0x9d/0x120 fs/block_dev.c:192
 ext4_fill_super+0x3a5/0x7ff0 fs/ext4/super.c:4065
 mount_bdev+0x1e8/0x290 fs/super.c:1368
 ext4_mount+0x2d/0x40 fs/ext4/super.c:6635
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1498
 do_new_mount fs/namespace.c:2915 [inline]
 path_mount+0x11ca/0x1d00 fs/namespace.c:3245
 do_mount fs/namespace.c:3258 [inline]
 __do_sys_mount fs/namespace.c:3466 [inline]
 __se_sys_mount+0x23d/0x2e0 fs/namespace.c:3443
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3443
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0xffff888101ba7138 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 6429 Comm: syz-executor.5 Tainted: G        W         5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
EXT4-fs warning (device loop5): ext4_fill_super:4103: metadata_csum and uninit_bg are redundant flags; please run fsck.
EXT4-fs (loop5): VFS: Found ext4 filesystem with unknown checksum algorithm.