================================================================== BUG: KCSAN: data-race in ext4_mark_iloc_dirty / find_inode_bit write to 0xffff8881195d4314 of 4 bytes by task 10992 on cpu 0: ext4_do_update_inode fs/ext4/inode.c:5081 [inline] ext4_mark_iloc_dirty+0x896/0x16f0 fs/ext4/inode.c:5724 __ext4_mark_inode_dirty+0x4db/0x5e0 fs/ext4/inode.c:5918 ext4_ext_tree_init+0x7e/0x90 fs/ext4/extents.c:828 __ext4_new_inode+0x29ff/0x2fe0 fs/ext4/ialloc.c:1327 ext4_symlink+0x2d1/0x780 fs/ext4/namei.c:3347 vfs_symlink+0xbe/0x170 fs/namei.c:4176 do_symlinkat+0x11e/0x2b0 fs/namei.c:4206 __do_sys_symlink fs/namei.c:4227 [inline] __se_sys_symlink fs/namei.c:4225 [inline] __x64_sys_symlink+0x32/0x40 fs/namei.c:4225 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881195d4314 of 4 bytes by task 10991 on cpu 1: recently_deleted fs/ext4/ialloc.c:702 [inline] find_inode_bit+0x227/0x3a0 fs/ext4/ialloc.c:728 __ext4_new_inode+0xb6c/0x2fe0 fs/ext4/ialloc.c:1063 ext4_symlink+0x2d1/0x780 fs/ext4/namei.c:3347 vfs_symlink+0xbe/0x170 fs/namei.c:4176 do_symlinkat+0x11e/0x2b0 fs/namei.c:4206 __do_sys_symlink fs/namei.c:4227 [inline] __se_sys_symlink fs/namei.c:4225 [inline] __x64_sys_symlink+0x32/0x40 fs/namei.c:4225 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 10991 Comm: syz-executor.1 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================