loop5: detected capacity change from 0 to 2048 ================================================ WARNING: lock held when returning to user space! 6.18.0-rc7-next-20251128 #1 Not tainted ------------------------------------------------ syz-executor.3/14885 is leaving the kernel with locks still held! 1 lock held by syz-executor.3/14885: #0: ffff88800b2ea348 (&sb->s_type->i_mutex_key EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. #28/1){+.+.}-{4:4}, at: start_creating_noperm+0x84/0xd0 Quota error (device loop5): find_block_dqentry: Quota for id 0 referenced but not present Quota error (device loop5): qtree_read_dquot: Can't read quota structure for id 0 EXT4-fs error (device loop5): ext4_acquire_dquot:6984: comm syz-executor.5: Failed to acquire dquot type 1 EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.