loop0: detected capacity change from 0 to 512
EXT4-fs: Ignoring removed mblk_io_submit option
==================================================================
BUG: KCSAN: data-race in __lru_add_drain_all / folios_put_refs

write to 0xffff888237d26528 of 1 bytes by task 16777 on cpu 1:
 folios_put_refs+0x266/0x2d0 mm/swap.c:1006
 folios_put include/linux/mm.h:2149 [inline]
 folio_batch_move_lru+0x258/0x280 mm/swap.c:179
 lru_add_drain_cpu+0x66/0x210 mm/swap.c:654
 lru_add_drain mm/swap.c:743 [inline]
 __folio_batch_release+0x44/0xb0 mm/swap.c:1065
 folio_batch_release include/linux/folio_batch.h:101 [inline]
 shmem_undo_range+0x346/0xb60 mm/shmem.c:1149
 shmem_truncate_range mm/shmem.c:1277 [inline]
 shmem_evict_inode+0x132/0x520 mm/shmem.c:1407
 evict+0x2a5/0x510 fs/inode.c:828
 iput_final fs/inode.c:2022 [inline]
 iput+0x430/0x5a0 fs/inode.c:2071
 dentry_unlink_inode+0x24a/0x260 fs/dcache.c:479
 dentry_kill+0x184/0x500 fs/dcache.c:826
 finish_dput+0x16/0x1d0 fs/dcache.c:1001
 dput+0x48/0x50 fs/dcache.c:1042
 end_renaming fs/namei.c:4122 [inline]
 filename_renameat2+0x478/0x6a0 fs/namei.c:6190
 __do_sys_rename fs/namei.c:6232 [inline]
 __se_sys_rename+0x4a/0x1c0 fs/namei.c:6228
 __x64_sys_rename+0x31/0x40 fs/namei.c:6228
 x64_sys_call+0x2b3/0x3020 arch/x86/include/generated/asm/syscalls_64.h:83
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x136/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888237d26528 of 1 bytes by task 26125 on cpu 0:
 folio_batch_count include/linux/folio_batch.h:56 [inline]
 cpu_needs_drain mm/swap.c:786 [inline]
 __lru_add_drain_all+0x17e/0x450 mm/swap.c:883
 lru_add_drain_all+0x10/0x20 mm/swap.c:899
 invalidate_bdev+0x47/0x70 block/bdev.c:101
 __ext4_fill_super fs/ext4/super.c:5803 [inline]
 ext4_fill_super+0x2c9e/0x3780 fs/ext4/super.c:5828
 get_tree_bdev_flags+0x291/0x300 fs/super.c:1634
 get_tree_bdev+0x1f/0x30 fs/super.c:1657
 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5860
 vfs_get_tree+0x57/0x1d0 fs/super.c:1694
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount+0x288/0x8d0 fs/namespace.c:3841
 path_mount+0x4ad/0xb90 fs/namespace.c:4161
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x28c/0x2e0 fs/namespace.c:4367
 __x64_sys_mount+0x67/0x80 fs/namespace.c:4367
 x64_sys_call+0x2d61/0x3020 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x136/0x3c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x05 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 26125 Comm: syz.0.5159 Tainted: G        W           syzkaller #0 PREEMPT(lazy) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
==================================================================
vlan0: entered promiscuous mode
vlan0: entered allmulticast mode
veth0_vlan: entered allmulticast mode
netlink: 24 bytes leftover after parsing attributes in process `syz.0.5159'.